ba378e intrinsically safe two input timer and clock · 2.1 atex gas certification 2.2 zones, gas...

Issue: 228th September 2016

BA378EIntrinsically safe

Two inputTimer and Clock

Issue 2

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1. DESCRIPTION

2. INTRINSIC SAFETY CERTIFICATION2.1 ATEX gas certification2.2 Zones, gas groups and T rating2.3 Special conditions for safe use2.4 Power supply2.5 Input terminals

2.5.1 Sensors that do not requireenergising.

2.5.2 Sensors that require energising2.6 Remote reset terminals2.7 Status output2.8 Optional control outputs2.9 Certification label information

3. SYSTEM DESIGN FOR HAZARDOUS AREAS3.1 Use with Zener barriers

3.1.1 Power supply3.1.2 Sensor inputs3.1.3 Switch contact input3.1.4 Open collector input3.1.5 2-wire proximity detector input3.1.6 Magnetic pick-off input3.1.7 Voltage pulse input3.1.8 Remote reset3.1.9 Status output3.1.10 Control outputs - optional

3.2 Use with Galvanic Isolators3.2.1 Power supply3.2.2 Sensor inputs3.2.3 Switch contact input3.2.4 Open collector input3.2.5 2-wire proximity detector input3.2.6 Magnetic pick-off input3.2.7 Voltage input3.2.8 Remote reset3.2.9 Status output3.2.10 Control outputs – optional

4. INSTALLATION4.1 Location4.2 EMC4.3 Installation Procedure4.4 Scale card

5. ACCESSORIES5.1 Display backlight5.2 Control outputs5.3 Scale card5.4 Tag information

6. OPERATION AS A TIMER6.1 Initialisation6.2 Controls when configured as a Timer6.3 Displays when configured as a Timer6.4 Timer structure6.5 Configuration as a Timer

6.5.1 Accessing configuration functions6.5.2 Summary of Timer configuration

functions6.5.3 Instrument function: FunCtion

6.5.4 Input A: inPut-A

6.5.5 Input type: inP . TYPE

6.5.6 Debounce: debounce

6.5.7 Input b: inPut-b

6.4.8 Lower display: di5P-2

6.5.9 Starting & stopping the Timer: 5tAr5toP

6.5.10 Units of display: unit5

6.5.11 Set time: 5Et t

6.5.12 Repeat timing cycle: CYCLE5

6.5.13 Cycle function enable: EnbL

6.5.14 Cycle count: cycl cnt

6.5.15 Restart delay: r5t dela

6.5.16 Adjusting the set time 5Et t from the display mode: AC5Et t

6.5.17 Direction of count: uP or dn

6.5.18 Power fail: p-fail

6.5.19 Local reset: LoC rEt

6.5.20 Local total reset: rE5Et . enbl

6.5.21 Local grand total reset: Glr Gtot

6.5.22 External reset: e-r5et

6.5.23 Status output: 5tat

6.5.24 Status output enable: EnbL

6.5.25 Status output on at: 5tat on

6.5.26 Status output off at: 5tat oFF

6.5.27 Status on delay time: 5tatdELA

6.5.28 Control output 1: oP1

6.5.29 Control output enable: EnbL

6.5.30 Control output on at: oP1 on

6.5.31 Control output off at: oP1 oFF

6.5.32 Output on delay time: oP1 dELA


6.5.34 Reset grand total from within the configuration menu: Clr Gtot

6.5.35 Security code: CodE

6.5.36 Reset configuration to factory defaults r5Et dEF

7. TIMER APPLICATION EXAMPLES7.1 Measuring the time that a contact is closed7.2 Controlling an IS solenoid valve

The BA378E is CE marked to show compliance with the European Explosive Atmospheres Directive2014/34/EU and the European EMC Directive 2014/30/EU

CONTENTS

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8 MAINTENANCE when configured as a Timer8.1 Fault finding during commissioning8.2 Fault finding after commissioning8.3 Servicing8.4 Routine maintenance8.5 Guarantee8.6 Customer comments

9. OPERATION AS A CLOCK9.1 Initialisation and loss of power9.2 Controls when configured as a clock9.3 Displays when configured as a clock9.4 Configuration as a clock

9.4.1 Accessing configuration functions9.4.2 Summary of Clock configuration

functions9.4.3 Instrument function: FunCtion

9.4.4 Display format: di5PLAY

9.4.5 Set clock display time: 5et

9.4.6 Enter synchronising time: 5YnC t

9.4.7 Status output: 5tat

9.4.8 Enable status output: enbl

9.4.9 Status output on and off times:5tat: on 1; 5tat: off 1

5tat: on 2; 5tat: off 2


9.4.11 Enable Control output 1: EnbL

9.4.12 Control output 1 on and off times:oP 1 : on 1; oP 1 : off 1

oP 1 : on 2; oP 1 : off 2


9.4.14 Enable control output 2: EnbL9.4.15 Control output 2 on and off times:

oP2 : on 1; oP2 : off 1

oP2 : on 2; oP2 : off 2

9.4.16 Access on & off times from display mode: AC5P


9.4.18 Reset configuration to factory defaults r5Et dEF

10. CLOCK CONFIGRATION EXAMPLE10.1 Configuration procedure

11. MAINTENANCE when configured as a clock11.1 Fault finding during commissioning11.2 Fault finding after commissioning11.3 Servicing11.4 Routine maintenance11.5 Guarantee11.6 Customer comments

Appendix 1IECEx certification

Appendix 2ETL and cETL certification

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1. DESCRIPTIONThe BA378E is an intrinsically safe, panel mountinginstrument with two inputs that can be configuredon-site as a Timer or as a Clock.

As a Timer the BA378E can measure and displaythe elapsed time between external events, or controlexternal events via the status output or optionalcontrol outputs.

When configured as a Clock, the instrument candisplay time in a variety of formats and the optionalcontrol outputs may be configured to turn on and offat pre-set times.

This instruction manual is divided into threesections.

Common features2. Intrinsic safety certification3. System design for hazardous areas4. Installations5. Accessories

Timer6. Operation as a timer7. Configuration example8. Maintenance

Clock9. Operation as a clock

10. Configuration example11. Maintenance

The common features sections of this instructionmanual describe ATEX certification for use in gasatmospheres.

For international applications the BA378E hasIECEx gas certification which is described inAppendix 1.

This instruction manual supplements theabbreviated instruction sheet supplied with eachinstrument.

2. INTRINSIC SAFETY CERTIFICATIONThe BA378E has IECEx and ATEX gas certification.This section of the instruction manual describesATEX gas certification. IECEx and other approvalsare described in separate appendixes to thismanual. The intrinsic safety of the instrument isunaffected by whether the BA378E is configured asa Timer or as a Clock.

2.1 ATEX gas certificationNotified Body Intertek Testing and Certification Ltdhave issued the BA378E with an EC-TypeExamination Certificate number ITS16ATEX28408X.This confirms compliance with harmonisedEuropean standards and this certificate has beenused to confirm compliance with the European ATEXDirective for Group II, Category 1G equipment. Theinstrument carries the community mark and subjectto local codes of practice may be installed in any ofthe European Economic Area (EEA) membercountries. ATEX certificates are also acceptable forinstallations in other countries such as Switzerland.

This instruction manual describes ATEX installationsin explosive gas atmospheres conforming withEN60079-14 Electrical Installations design, selectionand erection. When designing systems forinstallation outside of the UK the local Code ofPractice should be consulted.

2.2 Zones, gas groups and T ratingThe BA378E has been certified Ex ia IIC T5 Ga-40°C ≤ Ta ≤ 70°C. When connected to a suitablesystem it may be installed in:

Zone 0 explosive gas air mixturecontinuously present.

Zone 1 explosive gas air mixture likelyto occur in normal operation.

Zone 2 explosive gas air mixture notlikely to occur, and if it doeswill only exist for a short time

Be used with gases in groups:Group A propaneGroup B ethyleneGroup C hydrogen

In gases that may be used with equipment having atemperature classification of:

T1 450°CT2 300°CT3 200°CT4 135°CT5 100°C

At ambient temperatures between -40 and +70°C.

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The specified operating temperature of the BA378Eis -40 to +70°C. At temperatures below -20°C thedisplay digits will change more slowly and thecontrast will be reduced, but the instrument willcontinue to function

This allows the BA378E to be installed in all gasZones and to be used with most common industrialgases except carbon disulphide and ethyl nitritewhich have an ignition temperature of 95°C.

2.3 Special conditions for safe useThe ATEX certificate has an 'X' suffix indicating thatspecial conditions apply to prevent an electrostaticcharge developing on the outside of the instrumentenclosure.

CAUTIONTo avoid an electrostatic charge being

generated instrument enclosure shouldonly be cleaned with a damp cloth.

2.4 Power supplyWhen installed in a hazardous area the BA378Emust be powered via a certified Zener barrier orgalvanic isolator from a dc supply located in the safearea, or from certified associated apparatus with anintrinsically safe output.

The BA378E power supply terminals 1 and 2 inputsafety parameters are:

Ui = 28V dcIi = 200mA dcPi = 0.84W

Any certified Zener barrier or galvanic isolator withoutput safety parameters equal to or less than theselimits may be used to power the BA378E.

The maximum equivalent capacitance andinductance between terminals 1 and 2 is:

Ci = 2nFLi = 4µH

To determine the maximum permissible powersupply cable parameters the above figures, whichare small and may be ignored for many applications,should be subtracted from the maximum permittedparameters, Co and Lo, specified for the Zenerbarrier or galvanic isolator powering the BA378E.

2.5 Input terminalsWhen configured as a Timer the BA378E iscontrolled via input A and input b which may beindividually configured for use with different type ofsensors. Each of the two inputs is a separateintrinsically safe circuit, although the negative side ofeach input is internally connected to the negativeside of the power supply and the reset terminal RS2.See Fig 11. The two inputs should not be connectedin parallel.

Some types of sensor that may be connected to theBA378E inputs, such as a switch contact or a 2-wireproximity detector, require energising to determinetheir state. For sensors requiring energising fittingan external link between terminals 3 & 4 of theBA378E for input A and between terminals 7 & 8 forinput b, connects an internal 7V, 6mA supply to therespective input. Energising is not required when aBA378E input is connected to a voltage source.

Fitting an energising link changes the output safetyparameters of each BA378E input as shown in thefollowing table which also shows the types of sensorrequiring energising (link fitting).

Output safety parameters of each

input.Type of input Link* Uo Io Po

Switch contact Yes 10.5V 9.2mA 24mWProximity detector Yes 10.5V 9.2mA 24mWOpen collector Yes 10.5V 9.2mA 24mWMagnetic pick-off No 1.1V 0.5mA 0.2mWVoltage input (low) No 1.1V 0.5mA 0.2mWVoltage input (high) No 1.1V 0.5mA 0.2mW

*For input A link terminals 3 and 4*For input b link terminals 7 and 8

2.5.1 Sensors that do not require energisingSensors with a voltage output do not requireenergising, therefore terminals 3 & 4 for input A andterminals 7 & 8 for input b should not be linked.

When not energised i.e. without a link each BA378Einput complies with the requirements for simpleapparatus. For intrinsic safety purposes, sources ofenergy with output parameters less than 1.5V;100mA and 25mW are considered to be simpleapparatus (Clause 5.7 of EN60079-11), which allowsthem not to be considered or documented whenassessing the safety of an intrinsically safe system,thus simplifying loop assessment.

This allows almost any voltage output sensor to bedirectly connected to one of the BA378E inputs in ahazardous area providing that:

a. The sensor is a certified intrinsically safe devicehaving output parameters equal to or less than:

Uo ≤ 28V dcIo ≤ 200mA dcPo ≤ 0.84W

or complies with requirements for simple apparatus.

b. The sensor and associated wiring canwithstand a 500V rms insulation test to earth.

c. The sensor is located in the same hazardousarea as the BA378E.

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The BA378E EC-Type Examination Certificatespecifies that the equivalent capacitance andinductance of each BA378E input is:

Ci = 2nFLi = 4µH

To determine the maximum permissible cableparameters these figures should be subtracted fromthe maximum permitted output parameters Lo andCo specified by the certificate for the sensorconnected to the BA378E input terminals. TheBA378E input parameters are small and thereforeunlikely to make a significant difference to theallowable cable parameters.

2.5.2 Sensors that require energisingSwitch contacts, proximity detectors and opencollector sensors require energising which isachieved by linking two BA378E terminals togetherfor each input as described in section 2.5. Whenenergised, the output parameters of each BA378Einput are:

Uo = 10.5V dcIo = 9.2mA dcPo = 24mW

These parameters do not comply with therequirements for simple apparatus and should beconsidered when assessing the safety of the sensorconnected to a BA378E input.

Any certified intrinsically safe sensor may beconnected to a BA378E energised input providingthat the sensor's input safety parameters are equalto, or greater than, the output safety parameters ofthe BA378E input shown above. This is notrestrictive and most intrinsically safe sensors willcomply. A simple apparatus sensor, such as aswitch contact, may also be connected.

This allows most mechanically operated switches,open collector transistors and certified intrinsicallysafe NAMUR proximity detectors to be directlyconnected to a BA378E energised input. Thesensor and wiring should be able to withstand a500V rms insulation test to earth and the sensorshould be located in the same hazardous area asthe BA378E.

The maximum capacitance and inductance that maybe safely connected to each energised input(link connected) is:

Co = 2.4µFLo = 200mH

Again this is not restrictive as the combinedcapacitance and inductance of most sensors andconnecting cable will be less than this.

2.6 Remote reset terminalsConnecting the external reset terminals RS1 andRS2 together will reset the BA378E when configuredas a Timer and synchronises the displayed timewhen configured as a Clock. The two resetterminals have the following input and output safetyparameters:

Uo = 3.8V Io = 1mA Po = 1mW

Ui = 28V dcIi = 200mA dcPi = 0.84W

The equivalent capacitance and inductance betweenthem is:

Ci = 0nFLi = 0µH

The maximum cable capacitance and inductancethat may be safely connected between the resetterminals RS1 and RS2 is:

Co = 40µFLo = 1H

The reset terminals may be directly connected toany mechanically operated switch located within thesame hazardous area as the BA378E. The switchand associated wiring should be able to withstand a500V rms insulation test to earth.

If the reset switch is required in the safe area aZener barrier or intrinsically safe relay is required totransfer the contact closure into the hazardous area.Almost any intrinsically safe relay with certificationpermitting the contacts to be connected toequipment in the hazardous area may be used. Adiode return Zener barrier is not suitable for thisapplication.

When used as a Timer the BA378E may also bereset from the display mode by operating the & and* push buttons simultaneously for more than twoseconds. See 6.5.20

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2.7 Status outputAll BA378E models have an intrinsically safeoptically isolated open collector output which haszero output safety parameters and complies with therequirements for simple apparatus. This allows thestatus output terminals P1 and P2 to be connectedto any intrinsically safe circuit protected by a certifiedZener barrier or galvanic isolator providing theoutput parameters do not exceed:


The equivalent capacitance and inductance of thestatus output are both zero which allows themaximum permissible cable parameters specified bythe certificate for the Zener barrier or galvanicisolator powering the pulse output circuit to be used.

2.8 Optional control outputsEach of the two factory fitted optional control outputsis a separate galvanically isolated intrinsically safecircuit with output safety parameters complying withthe requirements for simple apparatus. This allowsthe control output terminals A1 & A2 and A3 & A4 tobe connected to almost any intrinsically safe circuitprotected by a Zener barrier or galvanic isolatorproviding the output safety parameters of the circuitdo not exceed:


The maximum equivalent capacitance andinductance between each set of control outputterminals is:

Ci = 22nFLi = 4µH

To determine the maximum permissible cablecapacitance Ci should be subtracted from themaximum permitted external capacitance Cospecified by the certificate for the intrinsically safeinterface powering the circuit being switched by thecontrol output. See figs 4 & 9.

2.9 Certification label informationThe BA378E product certification label is fitted in arecess on the top outer surface of the enclosure. Itshows the ATEX and IECEx certification informationplus BEKA associates name and location and theinstrument serial number. Certification informationfrom other authorities may also be included.

BA378E Certification information label

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3. SYSTEM DESIGN FOR HAZARDOUS AREAS

3.1 Use with Zener barriersZener barriers are the least expensive intrinsicallysafe interface between a safe and hazardous area.However, they require a high integrity earthconnection that may be expensive to install and theydo not provide isolation. When a high integrity earthconnection is not already available, it may be lessexpensive and complicated to use galvanic isolatorsfor the installation of a single BA378E.

Terminals 2, 6, 10 and RS2 of the BA378E areinternally connected together as shown in Fig 11. Ifany of these terminals are earthed, as shown inFigs 1 & 2, the other common terminals should onlybe connected to the same earth, i.e. the barrierbusbar, or to circuits that have at least 500V rmsinsulation to earth.

Any Zener barrier certified for the gas group in whichthe BA378E is installed may be used providing theoutput parameters do not exceed the inputparameters of the BA378E terminals to which it isconnected. Only one polarity of Zener barrier i.e.positive or negative may be used in each system.

Fig 1 illustrates the basic circuit that is used for allBA378E Timer installations protected by Zenerbarriers. BA378E Clock installations are the same,except that the two input terminals are not used. Forsimplicity the status output and the optional controloutputs are described separately in sections 3.1.9and 3.1.10 of this manual.

Fig 1 BA378E Timer protected by Zener barriers

Alternatively the sensors may be located in the safearea. Fig 2 shows how additional Zener barriers areused to transfer signals to the Timer in thehazardous area. When more than one Zener barrieris used in a system all must have the same polarity.i.e. all positive or all negative barriers.

When designing a Timer system it is important toremember that terminals 2, 6, 10 and RS2 of theBA378E are connected together within theinstrument. Similarly, terminals 2 and RS2 areinternally connected together when the BA378E isconfigured as Clock. See Fig 19.

Fig 2 BA378E Timer protected with Zener barriers sensors in the safe area.

3.1.1 Power supplyThe BA378E requires a minimum of 10V betweenterminal 1 & 2 and consumes:

10mA BA378E without optionsplus 6mA when terminals 3 & 4 are linkedplus 6mA when terminals 7 & 8 are linkedplus 16mA for optional backlight

Any Zener barrier certified for the Zone and gasgroup in which the BA378E is installed may be usedto power the instrument providing the output safetyparameters of the barrier are equal to or less thanthe input safety parameters of terminals 1 & 2.

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Although this allows a wide variety of barriers to beused, a positive polarity 28V; 93mA; 300Ω Zenerbarrier, which has an end-to-end resistance of about340Ω, is an industry standard device which isfrequently used. With this barrier the supply voltagein the safe area must be between the minimumvalue shown below and the maximum workingvoltage of the Zener barrier which, depending uponmanufacturer, will be approximately 26V.

13.5V min BA378E without options18.9V min BA378E with optional backlight

plus 2.1V when terminals 3 & 4 are linkedplus 2.1V when terminals 7 & 8 are linked

3.1.2 Sensor inputsWhen configured as a Timer both inputs may beconnected to a wide variety of hazardous areasensors as shown in Fig 1, or to safe area sensorsas shown in Fig 2. The two BA378E inputs are notused when the instrument is configured as a Clock.

No Zener barrier is required in series with each inputif the intrinsically safe sensor is located within thesame hazardous area as the BA378E. The followingtable shows the instrument's input switchingthresholds when configured to operate with varioussensors. For reliable operation the BA378E inputmust fall below the lower threshold and rise abovethe upper threshold.

SensorSwitching thresholds

Lower Upper

Switch 100Ω 1000Ω

Proximity detector 1.2mA 2.1mA

Open collector 2kΩ 10kΩ

Magnetic pick-off 0mV 40mV peak

Voltage pulse low 1.0V 3.0V

Voltage pulse high 3.0V 10.0V

Switch contacts, proximity detectors and opencollector sensors require energising which isachieved by linking two BA378E terminals togetherfor each input as described in section 2.5.

3.1.3 Switch contact inputAny mechanically activated switch contact may bedirectly connected to input terminals 5 & 6 or 9 &10providing the switch is located in the samehazardous area as the BA378E, and the switch andassociated wiring can withstand a 500V rmsinsulation test to earth. Most industrial push buttonsand magnetically activated reed relays comply withthis requirement.

The BA378E contains a configurable debouncecircuit to prevent false triggering of the instrument.Three levels of debounce protection areindependently available for each input. See section6.5.6.

3.1.4 Open collector inputAny open collector sensor located in the samehazardous area as the BA378E, such as amechanically activated opto-isolator may be directlyconnected to input terminals 5 & 6 or 9 &10. Thesensor and the associated wiring must be able towithstand a 500V rms insulation test to earth.

The BA378E contains a configurable debouncecircuit to prevent false triggering. Three levels ofdebounce protection are available See section 6.5.6.

3.1.5 2-wire proximity detector inputMost intrinsically safe NAMUR 2-wire proximitydetectors may be connected to a BA378E input,providing the input safety parameters of theproximity detector are equal to or greater than theoutput safety parameters of a BA378E input. i.e.

Ui ≥ 10.5V dcIi ≥ 9.2mA dcPi ≥ 24mW

and the minimum operating voltage of the proximitydetector is less than 7.5V. The proximity detectormust be located in the same hazardous area as theBA378E.

The BA378E contains a configurable debouncecircuit to prevent false triggering of the instrument.Three levels of debounce protection areindependently available for each input, See section6.5.6.

3.1.6 Magnetic pick-off input CoiL in the input configuration menu is a low levelvoltage pulse input intended for use with anintrinsically safe magnetic pick-off sensor. Whenconfigured for 'CoiL' input, the BA378E inputcomplies with the requirements for simple apparatusallowing connection to any certified intrinsically safemagnetic sensor having output parameters equal toor less than:


The maximum permitted cable parameters will be bethe sensor's Co and Lo specified on it's intrinsicsafety certificate, less the BA378E input parametersCi and Li which are small and can often be ignored.

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The magnetic pick-off must be located within thesame hazardous area as the BA378E and with theassociated wiring be able to withstand a 500V rmsinsulation test to earth.


3.1.7 Voltage pulse inputTwo voltage pulse input ranges are independentlyselectable in the BA378E Timer configuration menu,VoLt5 L and VoLt5 H. When configured for either ofthe voltage pulse ranges, the input terminals 5 & 6or 9 & 10 comply with the requirements for simpleapparatus. This allows the inputs to be connected toany certified intrinsically safe voltage source withinthe same hazardous area as the BA378E havingoutput parameters equal to or less than:


The BA378E Timer may therefore be directlyconnected to and controlled by most certifiedintrinsically safe high level voltage signals.

The maximum permitted cable parameters will bedefined by the intrinsic safety certification of thevoltage source less the BA378E input parameterswhich are small and can often be ignored.


3.1.8 Remote resetConnecting the external reset terminals RS1 andRS2 together will reset the BA378E when configuredas a Timer and synchronise the displayed time to apreset time when configured as a Clock.

Remote resetting may be accomplished by anymechanically operated switch located in the samehazardous area as the instrument providing theswitch and the associated wiring can withstand a500V rms insulation test to earth. No Zener barrieris required.

A BA378E may also be remotely reset from the safearea. Any switch may be used but a Zener barrieris required to transfer the contact closure into thehazardous area. A diode return barrier is notsuitable for this application.

Fig 1 illustrates how a BA378E may be reset fromboth the safe and the hazardous area.

Note: When used as a Timer the BA378E may alsobe reset from the display mode by operating the &and * push buttons simultaneously for more thantwo seconds. See 6.5.20

3.1.9 Status outputAll BA378E instruments have an opto-isolated opencollector output which can be configured to indicatethe status of the instrument, or to perform simplecontrol functions. The output has the followingelectrical parameters:

Ron = 60Ω + 3VRoff = 1MΩImax = 10mA

The status output is an optically isolated separateintrinsically safe circuit that has zero output safetyparameters and complies with the requirements forsimple apparatus. This allows the status outputterminals P1 and P2 to be connected to anyintrinsically safe circuit protected by a certified Zenerbarrier or galvanic isolator providing the outputparameters do not exceed:


The equivalent capacitance and inductance of thestatus output are both zero which allows themaximum permissible cable parameters specified bythe certificate for the Zener barrier or galvanicisolator powering the status output circuit to be used.The status output is a passive circuit i.e. un-poweredopen collector, but it is totally isolated from all othercircuits. Subject to complying with intrinsic safetyinterconnection requirements the terminals P1 andP2 may be connected to another instrument that canaccept an open collector input. The output mayalso be transferred to the safe area via a galvanicisolator or a Zener barrier.

Fig 3 shows how a 2-channel Zener barrier may beused to transfer the status output to the safe area.The positive terminal of the status output P1 isconnected to the instrument’s positive supplyterminal 1. When the status open collector output isactivated, the voltage on terminal P2 rises to thesupply voltage less 3V and a current flows throughthe diode return barrier and resistor R1 in the safearea. This current is defined by R1 which should bechosen to limit the current to less than 10mA. For a24V supply R1 should be great er than 2,200Ω.

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Fig 3 Transferring status output to safe area using Zener barriers.

3.1.10 Control outputs (optional)Each of the two factory fitted optional control outputsis a galvanically isolated single pole solid stateswitch as shown in Fig 4. The outputs are polarisedand current will only flow in one direction. TerminalsA1 and A3 should be connected to the positive sideof the supply.

Ron = less than 5Ω + 0.7VRoff = greater than 1MΩ

Note: Because of the series protection diode sometest meters may not detect a closed alarm output.

Fig 4 Equivalent circuit of each control output

Each control output is a separate galvanicallyisolated intrinsically safe circuit with output safetyparameters complying with the requirements forsimple apparatus. This allows the control outputterminals A1 & A2 and A3 & A4 to be connected toalmost any intrinsically safe circuit protected by aZener barrier providing the output parameters of thecircuit do not exceed:


The maximum equivalent capacitance andinductance between each set of alarm terminals is:

Ci = 22nFLi = 4µH

Fig 5 Typical control output application

To determine the maximum permissible cableparameters Ci and Li should be subtracted from themaximum permitted external capacitance Co andinductance Lo specified by the certificate for theZener barrier powering the circuit as shown in Fig 5.

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3.2 Use with Galvanic IsolatorsGalvanic isolators are probably the simplestintrinsically safe interface to install as they provideisolation and do not require a high integrity earthconnection.

Any galvanic isolator certified for the gas group inwhich the BA378E is installed, with outputparameters less than the input parameters of theBA378E having the correct function may be used.

Fig 6 BA378E used with galvanic isolators

Fig 6 illustrates the basic circuit that is used for allBA378E installations protected by galvanic isolators.

Alternatively sensors may be located in the safearea. Fig 7 shows how additional galvanic isolatorsare used to transfer the sensor output to theBA378E in the hazardous area, although it may bedifficult to find isolators for some sensors. For thisapplication the two BA378E external inputconditioning links should be positioned to suite theoutput of the galvanic isolator not the sensor.

Fig 7 BA378E Timer used with galvanic isolators with sensors in safe area.

3.2.1 Power supplyThe BA378E requires a minimum of 10V betweenterminal 1 & 2 and consumes:

10mA BA378E without optionsplus 6mA when terminals 3 & 4 are linkedplus 6mA when terminals 7 & 8 are linkedplus 16mA for optional backlight

Any galvanic isolator certified for the Zone and gasgroup in which the BA378E is installed may be usedto power the instrument. The output safetyparameters of the isolator must be equal to or lessthan the input safety parameters of terminals 1 & 2and the voltage at terminals 1 & 2 must be greaterthan 10V. These requirements are not restrictiveand allow a wide range of galvanic isolators, such assolenoid drivers, to be used.

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3.2.2 Sensor inputsAs shown in Fig 6 both BA378E inputs can bedirectly connected to hazardous area sensors, or tosafe area sensors via isolators as shown in Fig 7.Galvanic isolators are not required in series with theinputs if the intrinsically safe sensors are locatedwithin the same hazardous area as the BA378E.

The BA378E may be used with a wide variety ofsensors, the following table shows the switchingthresholds for each type. For reliable operation theinput signal must fall below the lower threshold andrise above the upper threshold.

SensorSwitching thresholds

Lower Upper

Switch 100Ω 1000Ω

Proximity detector 1.2mA 2.1mA

Open collector 2kΩ 10kΩ

Magnetic pick-off 0mV 40mV peak

Voltage pulse low 1.0V 3.0V

Voltage pulse high 3.0V 10.0V

Switch contacts, proximity detectors and opencollector sensors require energising which isachieved by linking two BA378E terminals togetherfor each input as described in section 2.5.

3.2.3 Switch contact inputAny mechanically activated switch contact may bedirectly connected to input terminals 5 & 6 and 9&10 providing the switch is located in the samehazardous area as the BA378E, and the switch andassociated wiring can withstand a 500V rmsinsulation test to earth. Most magnetically activatedindustrial push buttons and reed relays comply withthese requirements. The BA378E contains aconfigurable debounce circuit to prevent falsetriggering of the instrument. Three levels ofdebounce protection are independently available foreach input, See section 6.5.6

3.2.4 Open collector inputAny open collector sensor located in the samehazardous area as the BA378E, such as amechanically activated opto-isolator may be directlyconnected to input terminals 5 & 6 and 9 &10. Thesensor and the associated wiring must be able towithstand a 500V rms insulation test to earth.

The BA378E contains a configurable debouncecircuit to prevent false triggering. Three levels ofdebounce protection are available See section 6.5.6

3.2.5 2-wire proximity detector inputMost intrinsically safe NAMUR 2-wire proximitydetectors may be connected to a BA378E input,providing the input safety parameters of theproximity detector are equal to or greater than theoutput safety parameters of a BA378E input. i.e.

Ui ≥ 10.5V dcIi ≥ 9.2mA dcPi ≥ 24mW

and the minimum operating voltage of the proximitydetector is less than 7.5V. The proximity detectormust be located in the same hazardous area as theBA378E.

The BA378E contains a configurable debouncecircuit to prevent false triggering of the instrument.Three levels of debounce protection areindependently available for each input, See section6.5.6

3.2.6 Magnetic pick-off inputCoiL in the input configuration menu is a low levelvoltage pulse input intended for use with anintrinsically safe magnetic pick-off sensor. Whenconfigured for CoiL input, the BA378E inputcomplies with the requirements for simple apparatusallowing connection to any certified intrinsically safemagnetic sensor having output parameters equal toor less than:


The maximum permitted cable parameters will be bethe sensor's Co and Lo specified on it's intrinsicsafety certificate, less the BA378E input parametersCi and Li which are small and can often be ignored.

The magnetic pick-off must be located within thesame hazardous area as the BA378E and with theassociated wiring be able to withstand a 500V rmsinsulation test to earth.


15

3.2.7 Voltage inputTwo voltage input ranges are independentlyselectable in the BA378E configuration menu,VoLt5 L and VoLt5 H. When configured for either ofthe voltage pulse ranges, the input terminals 5 & 6and 9 & 10 comply with the requirements for simpleapparatus. This allows the inputs to be connected toany certified intrinsically safe voltage source withinthe same hazardous area as the BA378E havingoutput parameters equal to or less than:


The BA378E Timer may therefore be directlyconnected to and controlled by most certifiedintrinsically safe high level outputs.

The maximum permitted cable parameters will bedefined by the intrinsic safety certification of thevoltage source less the BA378E input parameterswhich are small and can often be ignored,

The BA378E contains a configurable debouncecircuit to prevent false triggering of the instrument.Three levels of debounce protection areindependently available for each input, See section6.5.6

3.2.8 Remote resetWhen configured as a Timer the BA378E totaldisplay may be remotely reset, depending uponconfiguration, to zero or to 5et t by connectingterminals RS1 & RS2 together. Permanentinterconnection inhibits totalisation. Whenconfigured as a Clock connecting terminals RS1 &RS2 together can synchronise the displayed time toa preset time.

Remote resetting or synchronisation may beaccomplished by any mechanically operated switchlocated in the same hazardous area as the BA378Eproviding it and the associated wiring can withstanda 500V rms insulation test to earth. No galvanicisolator is required.

A BA378E may also be remotely reset orsynchronised from the safe area. Any switch maybe used but a galvanic isolator or IS relay is requiredto transfer the contact closure into the hazardousarea. Fig 6 illustrates how a BA378E Timer may bereset from both the safe and the hazardous area.

Note: The BA378E can also be configured to resetwhen the & and * push buttons are operatedsimultaneously in the display mode for more thantwo seconds - see 6.5.20.

3.2.9 Status outputAll BA378E instruments have an opto-isolated opencollector output. This output has the followingelectrical parameters:

Ron = 60Ω + 3VRoff = 1MΩImax = 10mA

The status output is an optically isolated separateintrinsically safe circuit that has zero output safetyparameters. The output therefore complies with therequirements for simple apparatus. This allowsstatus output terminals P1 and P2 to be connectedto any intrinsically safe circuit protected by a certifiedgalvanic isolator providing the output parameters donot exceed:


The equivalent capacitance and inductance of thestatus output are both zero which allows themaximum permissible cable parameters specified bythe certificate for the galvanic isolator powering thestatus output circuit to be used. The status output isan open collector, but it is totally isolated from allother circuits. Subject to complying with theintrinsic safety interconnection requirements,terminals P1 and P2 may be connected to anotherinstrument that can accept an open collector input.The status output may also be transferred to thesafe area via a galvanic isolator as shown in Fig 8.

Some galvanic isolators intended for use with aNAMUR proximity detector are suitable fortransferring the status signal to the safe area.

Fig 8 Galvanic isolator used to transfer status output to the safe area.

16

3.2.10 Control outputs - optionalEach of the two factory fitted optional control outputsis a galvanically isolated single pole solid stateswitch as shown in Fig 9. The outputs are polarisedand current will only flow in one direction. TerminalsA1 and A3 should be connected to the positive sideof the supply.

Ron = less than 5Ω + 0.7VRoff = greater than 1MΩ

Note: Because of the series protection diode sometest meters may not detect a closed alarm output

Fig 9 Equivalent circuit of each control output

Each control output is a separate galvanicallyisolated intrinsically safe circuit with output safetyparameters complying with the requirements forsimple apparatus. This allows the control outputterminals A1 & A2 and A3 & A4 to be connected toalmost any certified intrinsically safe circuit protectedby a galvanic isolator providing the isolator has thecorrect function and the output parameters do notexceed:


The maximum equivalent capacitance andinductance between each set of alarm terminals is:

Ci = 22nFLi = 4µH (Effectively 0)

To determine the maximum permissible cableparameters Ci and Li should be subtracted from themaximum permitted external capacitance Co andinductance Lo specified by the certificate for thegalvanic isolator powering the circuit as shown inFig 10.

Fig 10 Typical control output application

17

4. INSTALLATION

4.1 LocationThe BA378E has a robust glass reinforced Norylenclosure with a toughened glass window. The fronthas IP66 ingress protection and a gasket seals thejoint between the instrument enclosure and thepanel, the rear of the instrument has IP20 ingressprotection.

The BA378E may be installed in any panel providingthat the operating temperature is between -40°C and+70°C and the intrinsic safety requirements arecomplied with. At temperatures below -20°C thedisplay digits will change more slowly and thecontrast will be reduced, but the instrument willcontinue to function

Fig 11 shows the overall dimensions of theinstrument together with the recommended panelcut-out dimensions. To achieve an IP66 sealbetween the instrument enclosure and theinstrument panel the smaller tolerance aperturemust be used, and the instrument must be securedwith four panel mounting clamps.

Although the front of the BA378E has IP66protection it should be shielded from continuousdirect sunlight and severe weather conditions.

CAUTIONElectrostatic hazard only clean instrument

with a damp cloth

4.2 EMCThe BA378E complies with the requirements of theEuropean EMC Directive 2014/30/EU. For specifiedimmunity all wiring should be in screened twistedpairs, with the screens earthed at one point withinthe safe area.

Recommended panel cut-outdimensions for all installations

Mandatory to achieve an IP66 sealbetween instrument and panel

136 +0.5/-0.0 x 66.2 +0.5/-0.0

DIN 43700138.0 +1.0/ -0.0 x 68 +0.7 -0.0

Support panel wiring to prevent vibration damage

Note: Optional backlight is internally powered

Fig 11 BA378E dimensions & terminals

18

4.3 Installation Procedure

a. Cut the specified aperture in the panel. Toachieve an IP66 seal between the instrumentenclosure and the instrument panel theaperture must have the tighter tolerancesspecified in Fig 11.

b. Slide the gasket over the body of the BA378Ebefore inserting the instrument into the panelaperture.

c. Firstly ensure that all the panel mountingclamps are closed by turning the knurledscrews fully anti clockwise until the two pips inthe clamp foot align with holes in the clampbody.

d. Place a clamp in the recess on each side of theinstrument, pulling gently to slide it onto thedovetail as shown in Fig 12. Push the knurledscrew slightly forward to engage the thread andtighten by turning clockwise until it is just fingertight. When the clamps are fitted ensure thatthe gasket behind the front panel bezel iscorrectly positioned before fully tightening theclamps to secure the instrument. The maximumrecommended clamp tightening torque is22cNm (1.95 lbf in) which is approximatelyequivalent to finger-tight plus one half turn.Do not over tighten.

e. Four panel mounting clamps are required toachieve an IP66 seal between a BA378E andthe instrument panel.

f. Connect the panel wiring to the rear terminalblock(s) as shown in Fig 11. To simplifyinstallation, the terminals are removable so thatthe panel wiring can be completed before theinstrument is installed. In areas subject tovibration wiring should be secured to preventdamage to the connectors.

Fig 12 Fitting panel mounting clamps

4.4 Scale cardThe BA378E's units of measurement are shown on aprinted scale card in a window at the right hand sideof the display. The scale card is mounted on aflexible strip that is inserted into a slot at the rear ofthe instrument as shown in Fig 13. Thus the scalecard can easily be changed without removing theBA378E from the panel or opening the instrumentenclosure.

New instruments are supplied with a printed scalecard showing the requested units of measurement, ifthis information is not supplied when the instrumentis ordered a blank card will be fitted.

A pack of self-adhesive scale cards printed withcommon units of measurement is available as anaccessory from BEKA associates. Custom printedscale cards can also be supplied - see 5.3

To change a scale card, unclip the tapered end ofthe flexible strip at the rear of the instrument bygently pushing it upwards and pulling it out of theenclosure. Peel the existing scale card from theflexible strip and replace it with a new printed card,which should be aligned as shown below. Do not fita new scale card on top of an existing card.

Install the new scale card by gently pushing theflexible strip into the slot at the rear of theinstrument, when it reaches the internal end-stopsecure it by pushing the end of the flexible stripdownwards so that the tapered section is held by therear panel.

Align the self-adhesiveprinted scale card ontothe flexible strip andinsert the strip into theinstrument as shownbelow.

Fig 13 Inserting the flexible strip carrying the scalecard into slot at the rear of the instrument.

19

5. ACCESSORIES

5.1 Display backlightThe BA378E Timer or Clock can be supplied with afactory fitted backlight that produce greenillumination enhancing display contrast and enablingit to be read at night or in poor lighting conditions.The backlight is internally powered from theinstrument power supply so no additional wiring orintrinsically safe interface is required, but the supplycurrent increases as shown below.

BA378E configured as Timer

currentconsumption

BA378E Timer or Clock 10mAAdditional for backlight 16mA

Addition with terminals 3 & 4 linked 6mAAddition with terminals 7 & 8 linked 6mA

---------------Total current 38mA max

BA378E configured as Clock

currentconsumption

BA378E Timer or Clock 10mAAdditional for backlight 16mA

---------------Total current 26mA max

5.2 Control outputsAlthough the dual isolated control outputs are factoryfitted options, they are described in the main body ofthis instruction manual as they will be used for themajority of applications. If control outputs arerequired they should be specified when theinstrument is ordered.

5.3 Scale cardThe BA378E has a window on the right hand side ofthe display through which a scale card showing theunits of measurement such as hours can be seen.New instruments are fitted with a scale card showingthe units of measurement specified when theinstrument was ordered, if the units are not specifieda blank scale card will be fitted. A pack of scalecards pre-printed with common units ofmeasurement is available as an accessory. Thesecan easily be fitted on-site to the BA378E withoutopening the instrument enclosure or removing itfrom the panel. See section 4.4 of this instructionmanual.

Custom scale cards for applications requiring lesscommon units of measurement are also available.

5.4 Tag informationNew instruments can be supplied with a tag numberor application information printed onto the rear paneladjacent to the terminals. This information is notvisible from the front of the instrument afterinstallation.

20

6. OPERATION AS A TIMERWhen configured as a Timer the BA378E canmeasure and display the elapsed time betweenexternal events. The Timer can be started andstopped by remote sensors, or from the front panelpush buttons.

The addition of optional factory fitted isolated controloutputs allows the Timer to control external eventssuch as opening a valve for a predetermined time.Again the Timer can be started and stopped byremote sensors, or from the front panel pushbuttons. Timed events can be repeated using theCYCLE function which enables the BA378E Timer torepeat the timing period up to 99 times, orcontinuously, with a configurable delay betweentimed periods of up to 100 hours.

The BA378E may be configured to time-up fromzero to the set time 5Et t, or to time-down from theset time to zero. Times may be entered anddisplayed in hours, minutes or in seconds, or in acombination of units. Elapsed or remaining time iscontinuously displayed and a separate display maybe activated to show the target set time 5Et t.Throughout the timing cycle the instrument can bepaused and restarted without changing the cycletime. Resetting is accomplished via the front panelpush buttons or a remote contact.

A grand total time is maintained by the instrumentwhich can be viewed by operating the front panelpush buttons and reset from the display mode orfrom within the configuration menu.

Fig 14 shows a simplified block diagram of theBA378E when configured as a Timer. The twoseparate inputs A and b can be individuallyconfigured to accept inputs from a wide variety ofsensors. When the sensor requires energising todetect its state, such as a switch contact, opencollector or a two wire proximity detector, a linkconnected between external terminals of theBA378E supplies power to the sensor inputterminals.

The optically isolated status control output is acurrent sink intended for monitoring the Timer'sstatus, but may also be used for simple controlapplications.

The instrument can be supplied with the followingfactory fitted accessories:

Internally powered Backlight

Dual isolated Control Outputs

The optional factory fitted dual isolated solid statecontrol outputs may be independently configured tobe activated in any of the timer's state allowing theBA378E Timer to perform a wide variety of tasks.

6.1 InitialisationEach time power is applied to a BA378Einitialisation is performed. After a short delay thefollowing display sequence occurs:

All segments of the display are activated

BA378E is ready to start functioning usingthe configuration information stored in theinstrument's permanent memory.

Fig 14 BA378E block diagram with Timerconfiguration.

21

6.2 Controls when configured as a TimerThe BA378E is controlled and configured via fourfront panel push buttons. In the display mode i.e.when the instrument is timing the push buttonfunctions are:

Push Button Functions

& When local control is enabled startsthe Timer. See 6.5.9

* When local control is enables stopsthe Timer. See 6.5.9

) + * Shows the grand total (run time) inhours and tenths of an hourirrespective of Timer configuration.If buttons are held for longer thanten seconds the grand total may bereset to zero if the grand total resetsub-function Glr gtot is enabled inthe LoC r5Et configuration function.See 6.5.21

To reset the grand total to zero fromthe display mode press the) + * buttons for ten secondsuntil CLr. no is displayed. Using the& or * button change the displayto CLr. YE5 and press ).

& + * Resets the Timer to zero or to theset time 5Et t depending onwhether the Timer is configured totime-up or time-down when the twobuttons are operatedsimultaneously for more than threeseconds. This is a configurablefunction. See 6.5.20

( + * When enabled in the configurationmenu, operating these two buttonssimultaneously provides directaccess from the display mode to theset time 5Et t and, if the repeattiming cycle is enabled, to therestart delay r5t dela See 6.5.16

( + & Shows firmware version

( + ) Accesses the configuration menu

6.3 Displays when configured as a TimerThe BA378E has two digital displays and associatedannunciators as shown on front cover of thismanual.

Elapsed time The upper display shows theelapsed time since the Timerwas started when timing-up fromzero and the remaining timewhen timing-down from the settime. Display may be formattedas hh:mm:ss; hh:mm; mm:ss orss.

Lower display The display options available onthe lower display depend onwhether the Timer repeat cyclefunction CYCLE5, which canrepeat the timing period up to 99times with a configurable delaybetween periods, is enabled.

CYCLE5 disabledThe lower display shows the settime 5ET t or the lower displaymay be disabled if not required.See 6.5.8

CYCLE5 enabledThe lower display shows thetotal number of repeat cyclesrequested together with thenumber of the current cycle.Each operation may be brieflynamed at it's start or periodicallythroughout the cycle.Alternatively the lower displaymay be disabled if not required.See 6.5.8

Reset Activated while elapsed time isannunciator being reset to zero or to the set

time 5ET t.

Status output RTX shown while status outputannunciator is activated.

Grand total Activated when the grand totalannunciator time is being shown on the

upper display.

Control output Show status of both optionalannunciators control outputs.

22

6.4 Timer structureFig 15 illustrates the Timer structure and function. Itapplies when the instrument is measuring the timebetween events or is controlling external events.

The circles in Fig 15 represent the five Timer states,Reset, Running, Restart-delay, Paused andComplete. The lines between the circles representthe event required to move the Timer betweenstates. e.g. to initiate timing the Timer is movedfrom the Reset state to the Running state by a startevent. This could be an input signal at input A oroperation of the & button. Similarly, to pause theTimer while it is timing, the Timer must be movedfrom the Running state to the Pause state by a stopevent which could be an input on input b oroperation of the * button.

ResetIn this state the Timer is readied for operation.The Timer is stopped and loaded with zero fortiming-up or 5Et t for timing-down.

RunningEntered by a start event from the Reset orPaused states. The Timer times-up to 5et t

or times-down to zero depending upon it'sconfiguration.

PauseEntered by a stop event from Running orRestart-delay. Timer is stopped, a start eventreturns the timer to it's previous state.

Restart-delayEntered automatically from Running. At theend of the delay time automatically returns toRunning.

CompleteEntered automatically from Running whenthere are no more timing cycles to perform.

When the CYCLE5 function is enabled the timingcycle can be specified to repeat up to 99 times, orcan be configured to repeat continuously.

6.5 Configuration as a TimerThe BA378E is configured via the four front panelpush buttons. All the configuration functions arecontained in an easy to use intuitive menu that isshown diagrammatically in Fig 16.

Each menu function is summarised in section 6.5.2of this manual and each summary includes areference to more detailed information.

All new BA378E instruments are supplied configuredas requested at the time of ordering. If configurationis not requested, the BA378E will be supplied withdefault Timer configuration as shown below, but theinstrument can easily be re-configured on-site.

Function Display DefaultAccess code CodE 0000

Function FunCtion ELAP5E

Input A inPut-A oP . CoL

Input b inPut-b oP . CoL

Debounce (each input) dEbounCE dEFAuLt

Display 2 di5P-2 5td

Start stop 5tAr5toP LoCAL

Units unit5 12 : 00 : 00

Set time 5Et t 00 : 00 : 00

Enable repeat cycle CYCLE5 oFF

Access set time from AC5Et t oFF

display mode.Direction of count uP or dn dn

Recovery from power p-fail idle

supply failure.Local total reset t-rE5Et on

Local grand total reset Gt-rE5Et oFF

External reset E-r5et 5td

Enable status output enbl off

Enable control output 1 EnbL oFF

Enable control output 2 EnbL oFF

24

6.5.1 Accessing configuration functionsThroughout this manual front panel push buttons areshown as &, *, ( and ). Legends displayedby the instrument are shown in a seven segmentfont just as they appear on the instrument e.g.inPut-A and Clr Gtot.

Access to the configuration menu is obtained byoperating the ( and ) push buttonssimultaneously. If the instrument is not protected byan access security code the first parameterFunCtion will be displayed. If a security code otherthan the default code 0000 has already beenentered, the instrument will display CodE. Press( to clear this prompt and enter the security codefor the instrument using the & or * push button toadjust the flashing digit and the ( push button totransfer control to the next digit. If the correct codehas been entered pressing ) will cause the firstparameter FunCtion to be displayed. If an incorrectcode is entered, or a push button is not operatedwithin ten seconds, the instrument will automaticallyreturn to the display mode.

All configuration functions and prompts are shownon the upper eight digit display.

Once within the main configuration menu therequired parameter can be selected by scrollingthrough the menu using the & or * push buttons.The Timer configuration menu is showndiagrammatically in Fig 16.

When returning to the display mode followingreconfiguration, the Timer will display dAtA followedby 5AVE while the new information is stored inpermanent memory.

6.5.2 Summary of Timer configuration functions

This section summarises all the Timer configurationfunctions. When read in conjunction with Fig 16 itprovides a quick aid for configuring the Timer. Ifmore detail is required, each section of thissummary contains a reference to a full description ofthe function.

Display Summary of function

FunCtion Instrument functionDefines the function of the instrument.May be set to:

ELAP5E Timer configurationCloC Clock configuration

All the entries in this Timer summaryassume that the BA378E is configuredas a Timer by selecting ELAP5E.See section 6.5.3

inPut-A Configuration of Input AContains a sub-menu with two sub-functions:

inP.tYPE Selects input sensor typedEbounCE Defines input debounce

See section 6.5.4

inP . tYPE

Configures the Timer sensor Input A toaccept one of six types of input:

VoLt5 L Voltage pulse <1 >3VVoLt5 H Voltage pulse <3 >10VCoiL Magnetic pick-off Pr . dEt Proximity detector *ContACt Switch contact *oP . CoL Open collector *

* Energise input by linking terminals 3& 4 for Input A.See section 6.5.5

dEbounCE

Defines the level of input debounceapplied to the input A to prevent falsecounting:

dEFAuLt

HEAVY

LiGHt

See section 6.5.6

25


inPut b Configuration of input-bAs configuration of inPut A

* Energise input by linking terminalsterminals 7 & 8 for Input b.See section 6.5.7

di5P-2 Lower displayConfigures the lower display to showset time 5Et t or, when the CYCLE5

repeat function is activated, the restartdelay count-down plus the cycle countnumber.

With CYCLE5 not enabled:

Select Lower display shows5td Set time 5et t

oFF Disables lower display.See section 6.5.8

With CYCLE5 enabled:

Select Lower display shows5td Cycle counts requested

and counts performedwith time-down shownduring requested delayperiod. Brief notificationof timer status i.e. CYCLE

or dELAY at start of eachperiod.

LAbEL Exactly as 5td but with periodic notification of timer status i.e. CYCLE or dELAY.

oFF Disables lower display.See section 6.5.8

5tAr5toP Starting and stopping the timerDefines how the Timer is started andstopped.

Start StopControL 1 A input high b input highControL 2 A input low b input lowControL 3 A input high A input lowControL 4 A input low A input highLoCAL & button * button

High and low inputs are specified for avoltage input. For other types ofsensor input, see section 6.5.9


unit5 Units of displayEnables the format of the displayedtime to be selected.

12 : 00 : 00 Hours, minutes & seconds12 : 00 Hours & minutes 30 : 00 Minutes & seconds 30 Seconds

Excludes delay of optional controloutputs which is always shown inseconds and the grand total which isalways shown in hours.See section 6.5.10

5Et t Set timeThis is the BA378E Timer's setpoint.When controlling an external event viathe optional control outputs theBA378E will time-down from the settime to zero or time-up from zero to theset time.Note: Timer will only start if a non zerovalue is entered for set time 5et t.See section 6.5.11

CYCLE5 Repeat timing cycleContains a sub-menu with threesub-functions, EnbL, CYCL Cnt andr5t dELA.See section 6.5.12

Cycle function enable EnbL

Enables or disables the cycles functionwithout changing the parameters.See section 6.5.13

Cycle count CYCL Cnt

Defines the number of times that thetimer cycle is repeated.See section 6.5.14

Restart delay r5t dELA

Defines the time delay between timercycles.See section 6.5.15

AC5Et t Access 5Et t from display modeContains two sub-functions, EnbL

which when activated allows the settime 5Et t and restart delay r5t dela

to be adjusted from the display mode.The second sub-function ACCd definesa separate access code to protectaccess to 5Et t from the display mode.See section 6.5.16

26


uP or dn Direction of countDefines whether the Timer times-upfrom zero to the set time 5Et t, ortimes-down from 5Et t to zero.See section 6.5.17

P-FAiL Power FailureDefines how the Timer functions whenpower is restored after a power failure.Contains three alternative optionsidle, Pau5E and continue.

Idle Idle

Timer returns in stopped state as ifhaving completed single timing cycledisplaying Timer value when powerwas lost. Timing resumes when resetfollowed by start instructions arereceived.

Pause pau5e

Timer returns in paused statedisplaying Timer value when powerwas lost. Timing resumes when startinstruction is received.

Continue continue

Timer will continue without any manualintervention.See section 6.5.18

LoC r5Et Local resetContains two sub-functions whichwhen enabled allow the Timer and thegrand total, which represents totalTimer run-time, to be reset to zero viathe front panel push buttons while theTimer is in the display mode.See section 6.5.19

Local total reset r5Et . EnbL

When on is selected, Timer is reset tozero, or 5et t if timing-down, when the& and * buttons are operatedsimultaneously for more than threeseconds in the display mode.See section 6.5.20

Local grand total reset CLr Gtot

When on is selected the grand total,which represents total run-time, maybe reset to zero by operating the) and * buttons simultaneously formore than 10 seconds in the displaymode.See section 6.5.21


e-r5et External resetDefines the time taken for closure ofexternal contacts connected toterminals RS1 & RS2 to reset theTimer.

5td 1sfa5t 2ms

See section 6.5.22

5tat op Status output Contains sub-menu with four sub-functions, EnbL, 5tat on, 5tat oFF and5tat.dELA

Note: Output is a current sink.See section 6.5.23

Status output enable EnbL

Enables or disables the status outputwithout changing any of theparameters.See section 6.5.24

Status output on 5tat on

Selects one of the five Timer stateswhen the status output comes on.Alternatively, selects one of the fivetimer states when the status outputdoes not comes on, but will be on inthe other four Timer states.See section 6.5.25

Status output off 5tat oFF

Selects one of the five Timer stateswhen the status output goes off.Alternatively, selects one of the fivetimer states when the status outputdoes not go off, but will be off in theother four Timer states.See section 6.5.26

Status on delay 5tat.dELA

Introduces a specified delay betweenthe on condition occurring and thestatus output being activated.See section 6.5.27

oP1 Control output 1 (Optional) Contains sub-menu with four sub-functions, EnbL, oP1 on, oP1 oFF andoP1 dELA.See section 6.5.28

Control output enable EnbL

Enables or disables control output 1without changing the parameters.See section 6.5.29

27


Control output 1 on oP1 on

Selects one of the five Timer stateswhen Control output 1 comes on.Alternatively, selects one of the fivetimer states when Control output 1does not come on, but will be on in theother four Timer states.See section 6.5.30

Control output 1 off oP1 oFF

Selects one of the five Timer stateswhen Control output 1 goes off.Alternatively, selects one of the fivetimer states when Control output 1does not go off, but will be off in theother four Timer states.See section 6.5.31

Control output on delay oP1 dELA

Introduces a specified delay betweenthe on condition occurring and controloutput 1 closing.See section 6.5.32

oP2 Control output 2 (Optional) op2

Functions as control output 1.See section 6.5.28 to 6.5.33

CLr Gtot Resets grand total to zeroThis function resets the grand total,which represents the total Timer run-time, from within the configurationmenu when CLr YE5 is selected and5urE is entered to confirm theinstruction.Note: Once reset, the grand total cannot be recovered.See section 6.5.34

CodE Security codeDefines a four digit alphanumeric codethat must be entered to gain access tothe instrument's configuration menu.Default code 0000 disables the securityfunction and allows unrestricted accessto all configuration functions when the( and ) buttons are operatedsimultaneously in the display mode.See section 6.5.35

r5Et dEF Reset to factory defaultsResets the BA378E to the Timerfactory default configuration shown insection 6.4 Instruction confirmed byentering 5urE.See section 6.5.36

6.5.3 Instrument function: FunCtion

The BA378E may be configured as a Timer or as aClock. This section of the instruction manualdescribes the Timer, for details of Clockconfiguration see section 9.

To reveal the existing function of the instrumentselect FunCtion from the configuration menu andpress (. If ELAP5E is displayed, the instrument isalready configured as a Timer therefore press ) toreturn to the FunCtion prompt in the configurationmenu. If CloC is displayed, press the * or &button to change the setting to ELAP5E followed bythe ( button which will result in a 0000 promptbeing displayed with the first digit flashing. This is arequest for the instruction to be confirmed byentering 5urE using the & or * button to adjustthe flashing digit and the ( button to move controlto the next digit. When 5urE has been entered,pressing ) will change the instrument to a Timerand return the instrument to the display mode. Toconfigure the Timer enter the configuration menu bypressing the ( and ) buttons simultaneously untilfunction is displayed.

6.5.4 Input A: inPut-A

The inPut-A function contains two sub-functionsinP . tYPE which defines the type of sensor that maybe connected to the input and dEbounCE whichadjust the amount of input noise rejection.

6.5.5 Input type: inP . tYPE

inP . tYPE is a sub-menu in the inPut-A functionwhich defines the type of input sensor that may beconnected to input A. To check or change the typeof input, select inPut-A in the configuration menuand press ( which will reveal the inP.tYPE prompt,pressing ( again will show the existing input. If setas required press ) twice to return to theconfiguration menu, or repeatedly press the * or& button until the required type of input isdisplayed, then press ) twice to return to theconfiguration menu.

One of following six types of input may be selected:

Display Input type Switchingthresholds

Low HighoPCoL Open collector² 2 10kΩVoLt5 L Voltage pulse low¹ 1 3VVoLt5 H Voltage pulse high¹ 3 10VCoiL Magnetic pick-off 0 40mVPr . dEt Proximity detector² 1.2 2.1mAContACt Switch contact² 100 1000Ω

28

Notes:1. Maximum voltage input +28V.

2. For sensors connected to input A thatrequire energising i.e. a proximity detector,a switch contact or an open collector,terminals 3 & 4 of the BA378E Timer shouldbe linked together.

3. To function correctly, the input signal mustfall below the lower switching threshold andrise above the higher switching threshold.

6.5.6 De-bounce: dEbouncE

dEbouncE is an adjustable sub-menu in theinPut-A' function which prevents the Timer mis-functioning when the input has noisy edges, such asthose resulting from a mechanical contact closingand bouncing. Three levels of protection may beselected and the amount of debounce applieddepends upon the type of Timer input that has beenselected in the inP . tYPE function.

The following table shows the minimum time that theinput signal must be continuously above the upperinput switching threshold and continuously below thelower switching threshold to ensure that the Timerprocesses the input signal. Input switchingthresholds are shown in section 6.5.5.

De-bouncelevel

Min input pulse width

Type of Input

Contact All others

Default 1600µs 40µs

Heavy 3200µs 350µs

Light 400µs 5µs

6.5.7 Input b: inPut-b

The input-b function and sub-functions are identicalto the input-A function & sub-functions described insections 6.5.4, 6.5.5 and 6.5.6.

Notes:1. Maximum voltage input +28V.

2. For sensors connected to input b thatrequire energising i.e. a proximity detector,a switch contact or an open collector,terminals 7 & 8 of the BA378E Timer shouldbe linked together.

3. To function correctly, the input signal mustfall below the lower switching threshold andrise above the higher switching threshold.

6.5.8 Lower display: di5P-2

The configuration options for the lower display varydepending upon whether the repeat timer functioncycle5 is enabled.

CYCLE5 disabledWhen the lower display is enabled it shows theset time 5ET t

CYCLE5 enabledWhen the lower display is enabled it shows thetotal number of repeat cycles requested togetherwith the number of cycles performed. During thedelay time between cycles the display shows thetime until the next cycle starts. Menu options allow each part of the cycle to bebriefly identified at the start of each part, orperiodically throughout the cycle.

To check or change the configuration of the lowerdisplay select di5P-2 from the configuration menuand press ( which will reveal the existing settingwhich can be changed by pressing the * or &button followed by the ) button to enter theselection and return to the configuration menu.

If the CYCLE5 function is not enabled thefollowing two options are available:

5td Lower display shows the Timer's set time5Et t, to which the BA378E will time-up to,or time-down from, depending upon thedirection of count selected in the uP or dn

function.

oFF Lower display disabled – see 6.5.17.

If the CYCLE5 function is enabled the followingthree options are available:

5td Lower display shows the number of cyclesrequested together with the current cyclenumber. During the configurable delayperiod between cycles the display times-down from the requested delay to zero. Abrief notification of timer status i.e. CYCLE

or dELAY is shown at the start of eachperiod.

02 -11Current Number of cycles

cycle number. requested, notshown when cycle is

continuously repeated.

LabEL Exactly the same as 5td, but timer statusi.e. CYCLE or dELAY is shown periodically.

oFF Lower display disabled.

29

6.5.9 Starting & stopping the Timer: 5tAr5toP

The Timer may be started and stopped by signals onInput A and Input b, or by operation of the front panel* or & push buttons.

To check or change the control of the Timer, select5tAr5toP from the configuration menu and press (which will reveal the existing setting which can bechanged by pressing the * or & button followedby the ) button to enter the selection and return tothe configuration menu. The options available areshown in the following tables.

Voltage inputs and control from front panelDisplay Start Stop

ControL 1 A input high b input highControL 2 A input low b input lowControL 3 A input high A input lowControL 4 A input low A input highLoCAL & button * button

Contact and open collector inputsDisplay Start Stop

ControL 1 A open b openControL 2 A closed b closedControL 3 A open A closedControL 4 A closed A open

Proximity detector inputDisplay Start Stop

ControL 1 A low current b low currentControL 2 A high current b high currentControL 3 A low current A high currentControL 4 A high current A low current

6.5.10 Units of display: unit5

Defines the format of all displayed times, except thedelay time of the status output and optional controloutputs which are always shown in seconds and thegrand total which is always shown in hours andtenths of an hour.

To check or change the units of display, select unit5

from the configuration menu and press ( whichwill reveal the existing setting which can be changedby pressing the * or & button followed by the )button to enter the selection and return to theconfiguration menu. The options available areshown in the following tables:

Display12 : 00 : 00 Hours, minutes & seconds12 : 00 Hours & minutes* 30 : 00 Minutes & seconds 30 Seconds

* Only available when time specified in seconds for5et t and r5t dela are zero or exactly divisible by60.

The Timer's maximum elapsed time in any format isequivalent to 99hours, 59 minutes & 59 seconds.

32

6.5.11 Set time: 5Et t

Set time is the Timer's setpoint. When controlling anexternal event via the optional control outputs theBA378E will time-down from the set time to zero ortime-up from zero to the set time.

To check or change the set time, select 5Et t fromthe configuration menu and press ( which willreveal the existing setting displayed in the unitsdefined by the unit5 function with the mostsignificant digit flashing. The flashing digit may beadjusted by pressing the * or & button followedby the ( button to transfer control to the next digit.When set as required, enter the selection and returnto the 5Et t prompt in the configuration menu byoperating the ) button.

Can also be adjusted from Timer display mode, see6.5.16.

Note: If 5Et t is zero the Timer will not functionwhen an external start input is received or the &button is operated.

6.5.12 Repeat timing cycle: CYCLE5

This a powerful function which allows the BA378Etiming cycle to be repeated up to 99 times orcontinuously with a configurable delay betweencycles of up to 99hours, 59 minutes & 59 seconds.

To check or adjust the repeat timing cycle, selectcycle5 from the configuration menu and press( which will enter a sub-menu containing threesub-functions, EnbL, CYCL Cnt and r5t dELA whichare described in the following sections.

6.5.13 Cycle function enable: EnbL

This sub-function allows the repeat timing cycle tobe enabled or disabled without altering any of therepeat timing cycle parameters. To check or changethe function select EnbL from the repeat timing cyclesub-menu cycle5s and press ( which will reveal ifthe repeat cycle function is on or oFF. The settingcan be changed by pressing the & or * buttonfollowed by the ) button to return to the repeattiming cycle sub-menu.

6.5.14 Cycle count: cycl cnt

This sub-function defines the number of times thetimer cycle is repeated. It may be set to any numberbetween 1 and 99, or to 00 for continuous repetition.To check or change the function select cycl cnt

from the repeat timing cycle sub-menu cycle5 andpress ( which will reveal the number of times thetimer cycle is to be repeated with the mostsignificant flashing. The flashing digit may beadjusted by pressing the * or & button followedby the ( button to transfer control to the next digit.

When set as required, enter the selection and returnto the cycl cnt prompt in the sub-menu by operatingthe ) button.

6.5.15 Restart delay: r5t dela

This sub-function defines the time delay betweenrepeat timing periods. It is shown in the formatselected in the units function and may be set to anytime between zero and the maximum time allowed inthe selected format.

Time format Maximum delay selected in

unit5

12 : 00 : 00 99 : 59 : 59

12 : 00 99 : 59

30 : 00 5999 : 59

30 359999

To check or change the restart delay time selectr5t dela from the repeat timing cycle sub-menucycle5 and press ( which will reveal the delaytime in the selected format with the most significantdigit flashing. The flashing digit may be adjusted bypressing the * or & button followed by the( button to transfer control to the next digit. Whenset as required, enter the selection and return to ther5t dela prompt in the sub-menu by operating the) button.

Can also be adjusted from Timer display mode, see6.5.16.

6.5.16 Adjusting the set time 5Et t and restart delay r5t dela from the display mode: AC5Et t

When this function is enabled the Timer's set time5Et t and restart delay r5t dela can be adjustedfrom the display mode by simultaneously operatingthe ( and * push buttons. Thus allowing anoperator to adjust these parameters without havingaccess to the instrument's configuration menu. Thefunction contains two sub-functions, EnbL whichactivates the function and ACCd which defines aseparate code for access to 5Et t with the Timer inthe display mode.

To check or change the function, select AC5Et t inthe configuration menu and press ( which willreveal the EnbL prompt, pressing ( again will showif the function is on or oFF. If adjustment of the settime from the display mode is not required press the* or & button to select no and then press )twice to return to the configuration menu. If thefunction is required, select YE5 and press ) toreturn to the EnbL prompt from which ACCd, whichallows a separate access code to be entered, can beselected by pressing the * or & button.

33

Access to 5Et t from the display mode may beprotected by a four digit alphanumeric security codewhich must be entered to gain access. Defaultsecurity code 0000 allows unrestricted access. WithACCd displayed, press ( to enter a new accesscode. The Timer will display 0000 with one digitflashing. The flashing digit may be adjusted usingthe * or & push button, when set as requiredoperating the ( button will transfer control to thenext digit. When all the digits have been enteredpress ) twice to return to the AC5Et t prompt in theconfiguration menu. The revised access code will beactivated when the BA378E is returned to thedisplay mode.Please contact BEKA associates sales department ifthe access code is lost.

6.5.17 Direction of count: uP or dn

The Timer may be configured to time-up from zero tothe set time 5Et t while displaying elapsed time, orto time-down from the set time 5Et t to zero whiledisplaying the remaining time.

When the repeat timing cycle function CYCLE5 isenabled, it is recommended that a down count isselected so that the progress of the timer can beobserved with a known completion time i.e. zero. Ifset as an up counter, elapsed time will be displayed,but the set time 5et t at which the timer will stop isnot shown.

To check the direction of count, select uP or dn fromthe configuration menu and press ( which willreveal the existing setting. This can be changed bypressing the * or & button followed by the )button to enter the selection and return to theconfiguration menu.

6.5.18 Power Fail: P-FAiL

Defines how the Timer powers-up and functionswhen power is restored after a power supplyinterruption. Three options are available, idle,Pau5e and continue.

idle The Timer is stopped in the state it achieveswhen it has timed-up to 5et t or timed-downto zero, with the elapsed or remaining timewhen power was lost shown on the upperdisplay. The Timer must be reset before itcan be restarted. If the repeat timing cycleis in use the number of cycles completedwill be lost when the Timer is reset.

Pau5e The Timer is stopped in the state it achievesfollowing receipt of a stop input to pausetiming – see Fig 15. The elapsed orremaining time when power was lost isshown on the upper display. Timingresumes when a start instruction isreceived. If a start input exists when poweris restored timing will start immediately.

Continue When power is restored the Timer willcontinue from where it stopped without anymanual intervention.

To check or change the function, select P-fail fromthe configuration menu and press ( which willreveal the existing setting which can be changed bypressing the * or & button followed by the )button to enter the selection and return to theconfiguration menu.

6.5.19 Local reset: LoC r5Et

The Local reset function contains two separate sub-functions rE5Et . Enbl and Glr Gtot which whenenabled allow the Timer and the grand total to bereset via the instrument's front panel push buttonswhile the Timer is in the display mode.

6.5.20 Local total reset: rE5Et . enbl

rE5Et . enbl is a sub-function in the Loc r5Et functionwhich when activated allows an operator to reset theTimer from the display mode by operating the *

and & push buttons simultaneously for more thanthree seconds.

To check or change the local total reset selectLoC r5Et in the configuration menu and press( which will reveal the rE5Et . enbl prompt, press( again to show if the local total reset is on or oFF.If set as required operate the ) button twice toreturn to the configuration menu, or the * or &button to change the setting followed by the )button twice to enter the change and return to theLoC . r5Et prompt in the configuration menu.

Note:The Timer may also be reset remotely byconnecting terminals RS1 and RS2 together.See section 3.2.8

6.5.21 Local grand total reset: Clr Gtot

The grand total is the total run-time of the Timer thatmay be viewed by operating the ) and * pushbuttons simultaneously in the display mode. Whenactivated clr Gtot allows an operator to reset thegrand total display to zero from the display mode byoperating the ) and * push buttonssimultaneously for more than ten seconds.

clr Gtot is a sub-function in the LoC r5Et menu. Tocheck or change the setting select LoC r5Et in theconfiguration menu and press ( which will revealrE5Et . enbl. Using the & or * button selectclr Gtot and press ( to show if local grand totalreset is on or oFF. If set as required operate the )button twice to return to the configuration menu, orthe & or * button to change the setting followedby the ) button twice to enter the change andreturn to the LoC r5Et prompt in the configurationmenu.

34

6.5.22 External resetThe Timer may be reset by connecting terminalsRS1 and RS2 together. This function defines howlong the connection must exist before resettingoccurs. When resetting is performed by a manuallyoperated external push button switch, 5td should bechosen. This requires the contact to be closed forone second before resetting occurs which preventsfalse resetting.

If the Timer is being reset by the a control output orsimilar apparatus Fa5t should be selected.

Select Resetting time5td 1sfa5t 2ms

6.5.23 Status output: 5tat oP

The status output of the Timer is an opto isolatedcurrent sink that can be used for transmitting thestatus of the Timer to other instruments. It may alsobe used for simple control applications. The function contains four sub-functions, EnbL,5tat on, 5tat oFF and 5tat.dELA. To gain access tothe sub-menu select 5tat op in the configurationmenu and press ( which will show the EnbL promptfrom which the other sub-functions can be accessedusing the & or * button.

There are ten independent status output on and offconditions. If the Status Output is only required tobe active in one Timer state configure as follows:

5tat on state required e.g. run

5tat off n state required e.g. n run

If the status output is required to be active in allTimer states except one configure as follows:

5tat on n state required e.g. n run

5tat off state required e.g. run

The Status Output can also be configured to beactive in three Timer states. e.g. when configuredas shown below the status output is on in thepau5ed, delay and done states, but off in the othertwo Timer states.

5tat on n run

5tat off re5et

6.5.24 Status output enable: EnbL

This function allows the status output to be enabledor disabled without altering any other status outputparameters. To check or change the function selectEnbL from the status output sub-menu and press( to reveal if the status output is on or oFF. Thesetting can be changed by pressing the & or *button followed by the ) button to return to thestatus output sub-menu.

6.5.25 Status output on : 5tat on

The status output is very versatile and may beconfigured to turn on (current sink activated) in anyone of the five Timer states, or to turn on whenTimer is not in one of the states. Status output on isshown by the RTX display annunciator. Timerstates are shown in Fig 15.

To define when the status output is on select 5tat on

from the sub-menu and press ( to show theexisting setting. Pressing the & or * button willscroll through the options:

Display Status output on when Timer is inre5et Reset state run Run statepau5e Pause statedelay Delay statedone Complete state

Status output on when Timer is NOT inn re5et Reset state n run Run staten pau5e Pause staten delay Delay staten done Complete state

When the required setting has been selected press) to enter the selection and return to the statusoutput sub-menu.

6.5.26 Status output off : 5tat off

The status output may be configured to turn off(current sink not activated) in any one of the fiveTimer states, or to turn off when not in one of the fiveTimer states. Timer states are shown in Fig 15.

To define when the status output is off select5tatoff from the sub-menu and press ( to showthe existing setting. Pressing the & or * buttonwill scroll through the options:

Display Status output off when Timer is inre5et Reset state run Run statepau5e Pause statedelay Delay statedone Complete state

Status output off when Timer is NOT inn re5et Reset state n run Run staten pau5e Pause staten delay Delay staten done Complete state


35

6.5.27 Status output on delay time: 5tat.dELA

The status output may be delayed from turning on

(current sink activated) for a fixed time following theselected condition occurring. e.g. when the timerenters the Run state. This delay can be adjusted in1 second increments up to 32,400 seconds, which is9 hours. If a delay is not required zero should beentered. To adjust the delay select 5tat.dELA fromthe status output sub-menu and press ( which willreveal the existing delay time with one digit flashing.The flashing digit can be adjusted using the & or* button and the ( button to move to the nextdigit. When the required delay has been entered,press ) to return to the status output sub-menu.

Timer configuration examples in section 7.2. and 7.3of this manual illustrate how to configure the statusoutput.

6.5.28 Control output 1 (optional): op1

Control output 1 is an optional factory fitted,galvanically isolated solid state switch contact whichcan be configured to turn on and off when the Timeris any of it's five states. The control output status isshown by the 1 control output display annunciator.

The function contains four sub-functions, EnbL,op1 on, op1 oFF and op1 dELA. To gain access to thesub-menu select op1 in the configuration menu andpress ( which will show the EnbL prompt fromwhich the other sub-functions can be accessedusing the & or * button.

There are ten independent Control Outpu 1 on andoff conditions. If Control Output 1 is only required tobe active in one Timer state configure as follows:

op1 on state required e.g. run

op1 off n state required e.g. n run

If Control Output 1 is required to be active in allTimer states except one configure as follows:

5tat on n state required e.g. n run

5tat off state required e.g. run

Control Output 1 can also be configured to be activein three Timer states. e.g. when configured asshown below Control Output 1 is on in the pau5ed,delay and done states, but off in the other two Timerstates.

5tat on n run

5tat off re5et

6.5.29 Control output 1 enable: EnbL

This function allows control output 1 to be enabledor disabled without altering any other control outputparameters. To check or change the function selectEnbL from the control output 1 sub-menu and press( to reveal if control output 1 is on or oFF. Thesetting can be changed by pressing the & or *button followed by the ) button to return to thecontrol output 1 output sub-menu.

6.5.30 Control output 1 on : op1 on

Control output 1 is very versatile and may beconfigured to turn on (output closed) in any one ofthe five Timer states, or to turn on when the Timer isnot in one of the Timer states. Timer states areshown in Fig 15.

To define when output 1 is on select op1 on from thecontrol output 1 sub-menu and press ( to show theexisting setting. Pressing the & or * button willscroll through the options:

Display Output 1 on when Timer is in

re5et Reset state run Run statepau5e Pause statedelay Delay statedone Complete state

Output 1 on when Timer is NOT in

n re5et Reset state n run Run staten pau5e Pause staten delay Delay staten done Complete state


36

6.5.31 Control output 1 off : op1 off

Control output 1 may be configured to turn off(output open) in any one of the five Timer states, orto turn off when the timer is not in one of the fiveTimer states. Timer states are shown in Fig 15.

To define when the output 1 is off select op1 off

from the sub-menu and press ( to show theexisting setting. Pressing the & or * button willscroll through the options:

Display Output 1 off when Timer is in

re5et Reset staterun Run statepau5e Pause statedelay Delay statedone Complete state

Output 1 off when Timer is NOT inn re5et Reset state n run Run staten pau5e Pause staten delay Delay staten done Complete state

When the required setting has been selected press) to enter the selection and return to the controloutput 1 sub-menu.

6.5.32 Control output 1 on delay time: op1 dELA

Control output 1 may be delayed from turning on

(output closed) for a fixed time following the selectedcondition occurring. e.g. when the Timer enters theRun state. This delay can be adjusted in 1 secondincrements up to 32,400 seconds, which is 9 hours.If a delay is not required zero should be entered. Toadjust the delay select op1 dELA from the controloutput 1 sub-menu and press ( which will revealthe existing delay time with one digit flashing. Theflashing digit can be adjusted using the & or *button and the ( button to move to the next digit.When the required delay has been entered, press) to return to the control output 1 output sub-menu.

Timer configuration examples in section 7.2. and 7.3of this manual illustrate how to configure the optionalcontrol outputs.

6.5.33 Control output 2 (optional): op2

Control output 2 is an optional, galvanically isolatedsolid state switch contact which can beindependently configured to turn on and off when theTimer is any of it's five states. It's functions andconfiguration are identical to control output 1described in sections 6.5.28 to 6.5.32

The control output status is shown by the 2 controloutput display annunciator.

6.5.34 Reset grand total from within the configuration menu: Clr Gtot

The grand total is the total run-time of the Timer thatmay be viewed by operating the ) and * pushbuttons simultaneously in the display mode.

The grand total can be reset to zero from within theconfiguration menu using this Clr Gtot function, orfrom the display mode if Clr Gtot is activated in thelocal grand total clear function - see 6.5.21

To zero the Timer grand total from within theconfiguration menu select Clr Gtot and press (which will cause the instrument to display Clr. no

with no flashing. Operate the & or * pushbutton until Clr . YE5 is displayed and then press( which will result in a 0000 prompt beingdisplayed with the first digit flashing. This is arequest for the instruction to be confirmed byentering 5urE using the & or * button to adjustthe flashing digit and the ( button to move controlto the next digit. Pressing ) will then reset thegrand total to zero and return the Timer to theconfiguration menu.

Note:Once reset, the grand total can not be recovered.


Access to the instrument configuration menu may beprotected by a four digit alphanumeric security codewhich must be entered to gain access. Newinstruments are configured with the default securitycode 0000 which allows unrestricted access to allconfiguration functions.

To enter a new security code select CodE from theconfiguration menu and press ( which will causethe Timer to display 0000 with one digit flashing.The flashing digit may be adjusted using the * or& push button, when set as required operating the( button will transfer control to the next digit.When the new security code has been entered press) to return to the CodE prompt. The revised securitycode will be activated when the Timer is returned tothe display mode.

Please contact BEKA associates sales department ifthe security code is lost.

37

6.5.36 Reset configuration to factory defaultsr5Et dEF

When the BA378E is configured as a Timer thisfunction resets the instrument to the Timer factorydefaults shown in sections 6.4

To reset the configuration select r5Et dEF from theconfiguration menu and press (. The BA378E willdisplay 0000 with the first digit flashing which is arequest to confirm the instruction by entering 5urE.Using the * or & button set the first flashing digitto 5 and press ( to transfer control to the seconddigit which should be set to u. When 5urE has beenentered pressing the ) button will reset all theconfiguration functions and return the instrument tothe display mode.

Note:r5Et dEF does not reset the grand total to zero.

7. TIMER APPLICATION EXAMPLESThis section illustrates three applications for theBA378E when configured as a Timer.

7.1 Measuring the time that a contact is closed.

In this example a BA378E is required to display thetime that a hazardous area contact is closed. Thedisplay is required in hours and minutes within thehazardous area and is to be reset to zero by a pushbutton located in the same hazardous area, not bythe instrument front panel push buttons. Theoperator is required to zero the grand total byoperating the ) + * buttons simultaneously. Nosecurity codes are required to protect access to theconfiguration menu or to the grand total reset.

Figure 17 shows the wiring for the BA378E whenpowered by a single channel Zener barrier. Thisexample illustrates how the Timer may be startedand stopped by one input, the second input is notused in this application.

Fig 17 Starting & stopping timer with one input

The required instrument configurations for thisexample are shown below.

Function Display SettingAccess code CodE 0000


Input A inPut-A ContACt

De-bounce Input A dEbounCE dEFAuLt

Display 2 di5P-2 oFF

Start stop 5tAr5toP ControL 4

Units unit5 12 : 00

Set time 5Et t 9999 : 99 : 99

Local total reset rE5E EnbL oFF

Local grand total reset Clr Gtot on

38

7.2 Controlling an IS solenoid valveThis example illustrates how a BA378E Timer canopen an intrinsically safe solenoid valve for 5minutes each time a start button is operated. Theoperator needs to pause the process withoutaffecting the total time that the valve is open. At theend of the process the Timer is required toautomatically reset within 10 seconds ready for thenext timing cycle to be started.

For this application the BA378E Timer requires dualcontrol outputs which are a factory fitted option andshould be specified when the instrument is ordered.

Control output 1 is used to switch the intrinsicallysafe solenoid valve, and control output 2 is wired tothe Timer's reset terminals to perform the automaticresetting at the end of the timing cycle, see Fig 18.

The Timer is configured to perform one timing cyclecycl cnt with a restart delay r5t dela of 5s and Settime 5et t is adjusted to 5 minutes the required timethat that the valve is to be open.

Control outputs are configured so that control outputone is only closed when the timer is in the Run state.Control output 2 is configured to only close when theTimer is in the Done state which occurs after it hasbeen in the Restart-delay state for 5 seconds. Thesequence of events is shown in Fig 18 and theTimer's configuration at the end of this section.

This valve opening process is to be linked to otherprocesses, therefore the status output is required toindicate when the 5 minute valve open period hasbeen completed and when the Timer has been resetand is ready for the next cycle.

When the start button is operated the Timer entersthe Running state and control output 1 closes for 5minutes opening the solenoid valve. At the end ofthe 5 minute period control output 1 opens whichcloses the solenoid valve and the Timer enters theRestart-delay state for 5 seconds followed by theDone state. Control output 2 is configured to closewhen the Timer is in the Done state. Control output2 is externally connected to the Timer's resetterminals which causes the Timer to automaticallyreset ready to start another cycle when the startbutton is operated.

If at any time during the cycle the stop button isoperated the Timer will enter the Pause state whichwill stop the process until the start button is operatedwhen it will resume without shortening the total valveopen time.

Fig 18 Control of valve in a hazardous area.

39

The required instrument configurations for thisexample are shown below.

Function Display SettingAccess code CodE 0000


Input A inPut-A ContACt

Input b inPut-b ContaCt

De-bounce (both inputs) dEbounCE dEFAuLt

Display 2 di5P-2 5td

Start stop 5tAr5toP ControL 2

Units unit5 12 : 00 : 00

Set time 5Et t 00 : 05 : 00

Timer repeat cycle CYCLE5

Enable repeat cycle EnbL on

Cycle count cycl cnt 01

Reset delay r5t dela 0000.05

Access set time from AC5Et - t oFF

display mode.Direction of count uP or dn dn

Power failure p-fail idle

Local total reset rE5Et . EnbL oFF

Local grand total reset CLr Gtot oFF

External reset e r5et fa5t

Enable control output 1 EnbL on

Control output 1 on at oP1 on run

Control output 1 off at oP1 oFF n run

Control output 1 delay oP1 dELA 00000

Enable control output 2 EnbL on

Control output 2 on at oP2 on done

Control output 2 off at oP2 oFF n done

Control output 2 delay oP2 dELA 00005

Enable status output EnbL on

Status output on at 5tat on re5et

Status output off at 5tat oFF n re5et

Statuss output delay 5tatdELA 00000

40

8. MAINTENANCE when configured as a Timer

8.1 Fault finding during commissioningIf a BA378E fails to function as a Timer duringcommissioning the following procedure should befollowed:

Symptom Cause Check:

No display No powersupply, or

incorrect wiring.Note: Terminals2, 6, 10 & RS2

areinterconnected

within theinstrument.

That there isbetween 10 and

28V onterminals 1 & 2with terminal 1

positive.

Instrumentconfiguration

menu does notcorrespond withTimer section of

this manual.

BA378E may beconfigured as a

clock.

That FunCtion

in configurationmenu is set toELAP5E not to

CloC.

Timer will notstart.

Timer not reset

Set time 5Et t

has not beenentered.

Reset timer viaexternal contactor by operating

* and &buttons

simultaneouslyif the local totalreset r5Et enbL

function hasbeen activated.

Enter time otherthan zero for

5Et t'.

Timer will notrespond to

sensor inputs.

Input A and/orInput b

incorrectlyconfigured, or

sensorincorrectlyconnected.

Input A andinput b

configurationand that inputenergising link

is correctly fittedfor selected

sensor.

Controloutput(s) do not

function.

Control outputshave not been

enabled.

Enable ControlOutput(s) in the

configurationmenu.

Unable to enterconfiguration

menu.

Incorrectsecurity code

That the correctsecurity code is

being used.

Contact BEKA ifcode is lost.

8.2 Fault finding after commissioning

ENSURE PLANT SAFETY BEFORESTARTING MAINTENANCE

Live maintenance is permitted onintrinsically safe equipment installed ina hazardous area, but only certified testequipment should be used unless a gasclearance certificate is available.

If a BA378E fails after it has been functioningcorrectly, the following table may help to identify thecause of the failure.


No display No powersupply


28V onterminals 1 & 2with terminal 1

positive.

Timer will notstart.

Timer not reset Reset timer viaexternal contactor by operating

* and &buttons

simultaneously iflocal total resetrE5Et . EnbL hasbeen activated.

Controloutput(s) do not

function.

Control Outputshave not been

enabled.


configurationmenu.

Unable to enterconfiguration

menu.

Incorrectsecurity code


being used.Contact BEKA if

code is lost.

If this procedure does not reveal the cause of thefault, it is recommended that the instrument isreplaced.

Note:If configuration changes are made to any ofthe following functions the Timer will beforced into a fail safe idle condition. Thisstops the Timer in the state it achieves whenit has timed-up to 5et t or timed-down to0000. The Timer must be reset before it canbe restarted.

Input A, Input b, 5tart5top, cycle5,up or dn, op1 and op2.

41

8.3 ServicingWe recommend that faulty BA378E Timers arereturned to BEKA associates or to our local agent forrepair. It is helpful if a brief description of the faultsymptoms is provided.

8.4 Routine maintenanceThe mechanical and electrical condition of theinstrument should be regularly checked. Inspectionfrequency should be chosen to suit theenvironmental conditions.

8.5 GuaranteeInstruments which fail within the guarantee periodshould be returned to BEKA associates or our localagent. It is helpful if a brief description of the faultsymptoms is provided.

8.6 Customer commentsBEKA is always pleased to receive comments fromcustomers about our products and services. Allcommunications are acknowledged and wheneverpossible, suggestions are implemented.

42

9. OPERATION AS A CLOCKWhen configured as a clock the BA378E can displaylocal time in a variety of twelve or twenty four hourformats. The displayed time can be adjusted via thefront panel push buttons which may be protected bya user definable four digit security code to preventunauthorised or accidental adjustment.

The clock may be synchronised to an external timestandard via the instrument's reset terminals. Whenthese two terminals are connected together by anexternal switch contact, the clock display will bereset to a preconfigured time and will resumerunning from this time when the contacts areopened.

The optically isolated status open collector outputcan be used to monitor the clock or to performsimple control functions.

When fitted with the optional galvanically isolatedcontrol outputs the clock can be configured to turneach solid state output on and off twice during eachtwenty four hour period.

Fig 19 shows a simplified block diagram of theBA378E configured as a clock.

The instrument can be supplied with the followingfactory fitted accessories:

Backlight Internally powered

Dual isolated control outputs

Fig 19 BA378E block diagram with clock configuration.

9.1 Initialisation and loss of powerEach time power is applied to a BA378Einitialisation is performed. After a short delay thefollowing display sequence occurs:

All segments of the display are activated

Instrument starts functioning, using the configuration information stored in the instrument's permanent memory.

Following initialisation, the instrument will display aflashing display which is a request for the local timeto be entered. The clock will not start to functionuntil a display time has been entered, or the remotereset contacts are closed and opened tosynchronise the clock to a preconfigured time.

If during normal operation the power supply isinterrupted for more than 30ms, the display willreturn to the flashing condition and the display timewill have to be re-entered. This time may beincreased by powering the Clock from a lightlyloaded galvanic isolator or via a Zener barrier froman instrument supply with large output capacitance.

9.2 Controls when configured as a clock The BA378E clock is configured and adjusted viafour front panel push buttons. In the display modei.e. when the instrument is displaying time, the pushbutton functions are:

Push Button Functions

( + & Shows firmware version

( + ) Access to configuration menu

Note: When optional control outputs are fitted, theBA378E clock may be configured to provide directaccess to the control outputs from the display modewhen the ( + * push buttons are operated. - seesection 9.4.16

9.3 Displays when configured as a clockThe BA378E clock has a single digital display plusannunciators.

Time Shows time in selected 12 ordisplay 24 hour format.

Reset Activated while clock is beingannunciator synchronised and external

reset contacts are closed.

Status output RTX shown while status annunciator output is activated.

Control output Show status of both optionalannunciators control outputs.

43

9.4 Configration as a ClockThe BA378E is configured and calibrated via fourfront panel push buttons. All the configurationfunctions are contained in an easy to use intuitivemenu that is shown diagrammatically in Fig 20.

Each menu function is summarised in section 9.4.2of this manual and each includes a reference tomore detailed information.

All new BA378E instruments are supplied configuredas requested at the time of ordering. If configurationis not requested, the BA378E will be supplied withdefault Timer configuration as shown in section 6.5.

If a BA378E Clock is requested without detailedconfiguration information, the instrument willsupplied with default Clock configuration as shownbelow, but can easily be re-configured on-site.

Function Display DefaultAccess code CodE 0000

Function FunCtion CLoC

Display di5PLAY 12 : 00

Set display time 5Et A 12 : 00 : 00

Syncronise time 5YnC t A 12 : 00 : 00

Enable status output enbl off

Enable control output 1* EnbL oFF

Enable control output 2* EnbL oFF

Enable access alarm AC5P oFF

times from display mode.Access code for alarm ACCd 0000

times from display mode.

Note: * Control outputs are a factory fitted option.

9.4.1 Accessing configuration functionsThroughout this manual push buttons are shown as&, *, ( and ) and legends displayed by theClock are shown in a seven segment font just asthey appear on the instrument e.g. di5PLAY andCodE.

Access to the configuration menu is obtained byoperating the ( and ) push buttonssimultaneously. If the instrument is not protected byan access security code the first parameterFunCtion will be displayed. If a security code otherthan the default code 0000 has already beenentered, the instrument will display CodE. Press( to clear this prompt and enter the security codefor the instrument using the & or * push button toadjust the flashing digit, and the ( push button totransfer control to the next digit. If the correct codehas been entered pressing ) will cause the firstparameter FunCtion to be displayed. If an incorrectcode is entered, or a push button is not operatedwithin ten seconds, the instrument will automaticallyreturn to the display mode.

All configuration functions and prompts are shownon the upper eight digit display.

Once within the main configuration menu therequired parameter can be selected by scrollingthrough the menu using the & or * push button.The Clock configuration menu is showndiagrammatically in Fig 20.

When returning to the display mode followingreconfiguration, the Clock will display dAtA followedby 5AVE while the new information is stored inpermanent memory.

46

9.4.2 Summary of Clock configuration functions.

This section summarises all the Clock configurationfunctions. When read in conjunction with Fig 17 itprovides a quick aid for configuring the Clock. Ifmore detail is required, each section of thissummary contains a reference to a full description ofthe function.


FunCtion Instrument functionDefines the function of theinstrument.May be set to:

ELAP5E TimerCloC Clock

All the entries in this Clockconfiguration summary assume thatthe BA378E is configured as a Clockby selecting CLoC.See section 9.4.3

di5PLAY Display formatDefines the clock display format,four alternatives are available.Select:

12 : 00 Twelve hours without seconds12 : 00 : 00 Twelve hours with seconds24 : 00 Twenty four hours without seconds24 : 00 : 00 Twenty four hours with secondsSee section 9.4.4

5Et Set clock display timeEnables the clock displayed time tobe adjusted, the clock resumesoperation when the instrument isreturned to the display mode.See section 9.4.5

5YnC t Synchronising timeDefines the time to which the clockdisplay is set when the resetterminals RS1 and RS2 areconnected together. The Clockrestarts from the synchronising timewhen terminals RS1 and RS2 aredisconnected.See section 9.4.6


5tat op Status output Status output can turn on (opencollector on) and off (open collectoroff) once or twice in each twenty-fourhour period. This function containsfive sub-function:

EnbL Enables Status output and defines if it turns on and off once or twice in each 24 hours.

5tat : on 1 Time when oP 1 turns on 1st time5tat : oFF 1 Time when oP 1 turns off 1st time5tat : on 2 Time when oP 1 turns on 2nd time5tat : oFF 2 Time when oP 1 turns off 2nd time

Note: Output is a current sink.See sections 9.4.7 to 9.4.9

oP1 Control output 1 (Optional)Control output 1 can turn on (outputclosed) and off (output open) once ortwice in each twenty-four hour period.This function contains five sub-function:

EnbL Enables output 1 and defines if it turns on and off once or twice in each 24 hours.

oP 1 : on 1 Time when oP 1 turns on 1st timeoP 1 : oFF 1 Time when oP 1 turns off 1st timeoP 1 : on 2 Time when oP 1 turns on 2nd timeoP 1 : oFF 2 Time when oP 1 turns off 2nd timeSee sections 9.4.10 to 9.4.12

oP2 Control output 2 (Optional)As control output 1 described above.See section 9.4.13 to 9.4.15

AC5P Access control output alarm-times from display mode.Contains two sub-functions, EnbL

which when activated allows thecontrol output times to be adjustedfrom the display mode (displayingtime). The second sub-function ACCd

defines a four digit alphanumericaccess code which may be used toprotect access to the control outputtimes from the display mode. Defaultcode 0000 disables this securityfeature and allows unrestrictedaccess.See section 9.4.16

47


CodE Security codeDefines a four digit alphanumeric codethat may be used to protect access tothe Clock configuration menu. Defaultcode 0000 disables this securityfunction and allows unrestrictedaccess to all configuration functionswhen the ( and ) buttons areoperated simultaneously in the displaymode.See section 9.4.17

r5Et dEF Reset to factory defaultsResets the BA378E to the Clockfactory default configuration shown insection 9.4 Instruction confirmed byentering 5urE.See section 9.4.18

9.4.3 Instrument function: FunCtion

The BA378E may be configured as a Timer or as aClock. This section of the instruction manualdescribes the Clock, for details of Timerconfiguration see section 6.4.

To reveal the existing function of the instrumentselect FunCtion from the configuration menu andpress (. If CLoC is displayed, the instrument isalready configured as a Clock therefore press ) toreturn to the FunCtion prompt in the configurationmenu. If ELAP5E is displayed, press the * or &

button to change the setting to CLoC followed by the( button which will result in a 0000 prompt beingdisplayed with the first digit flashing. This is arequest for the instruction to be confirmed byentering 5urE using the * or & button to adjust theflashing digit and the ( button to move control tothe next digit. When 5urE has been entered,pressing ) will change the instrument to a Clockand return the instrument to the display mode. Toconfigure the Clock enter the configuration menu bypressing the ( and ) buttons simultaneously untilfunction is displayed.

9.4.4 Display format: di5PLAY

The BA378E Clock may be configured to displaytime in a 12 or 24 hour format with or withoutseconds. When a 12 hour format is selected, AM isdenoted by an A prefix at the left hand side of thedisplay, similarly a P is displayed to denote PM.

To check or change the display format of the Clock,select di5PLAY from the configuration menu andpress ( which will reveal the existing setting whichcan be changed by pressing the * or & buttonfollowed by the ) button to enter the selection andreturn to the configuration menu. The optionsavailable are shown below:

12 : 00 Twelve hour format without seconds12 : 00 : 00 Twelve hour format with seconds24 : 00 Twenty four hour format without seconds24 : 00 : 00 Twenty four hour format with seconds

9.4.5 Set clock display time: 5Et

This function sets the time displayed by the Clockwhich must be entered each time the BA378E Clockis powered. Until a set time is entered the Clock willdisplay a flashing 00 : 00 : 00 or 00 : 00 depending uponhow it has been configured.

To adjust the clock set time, select 5Et from theconfiguration menu and press ( that will show00 : 00 : 00 or the existing set time with the hoursflashing. When setting the clock display timeseconds are always shown. Using the * or &

button adjust the flashing hours and then press (

to transfer control to the minutes display, pressing( again will transfer control to the seconds display.When adjustment is complete press ) to start theClock and return to the 5Et prompt.

48

9.4.6 Enter synchronising time: 5YnC t

When the external reset terminals RS1 and RS2 areconnected together the clock is stopped and thedisplayed time is set to the synchronising time.When the connection between the reset terminals isremoved, the clock restarts from the synchronisingtime.

To enter the synchronising time, select 5YnC t fromthe configuration menu and press ( which willreveal the existing synchronising time with the hoursflashing. Using the * or & button adjust thehours and then press ( to transfer control to theminutes display, pressing ( again will transfercontrol to the seconds display. When thesynchronising time has been set as required, press) to return to the configuration menu.

9.4.7 Status output: 5tat op

The status output is an optically isolated opencollector that can be used for transmitting the statusof the Clock to other instruments. It may also beused for simple control applications. Status on isindicated by the RTX display annunciator.The function contains five sub-functions allowingthe Status output open collector to be turned on andoff once or twice in each twenty-four hour period.

EnbL Number of times status outputturns on & off in 24 hours.

5tat : on 1 First time Status oP turns on 5tat : oFF 1 First time Status oP turns off 5tat : on 2 Second time Status oP turns on5tat : oFF 2 Second time Status oP turns off

To check or change the function of the status outputselect 5tat op from the configuration menu andpress ( which will reveal the first sub-functionEnbL.

9.4.8 Enable Status output: EnbL

This is a sub-function in the Status output function5tat which allows the status output open collector tobe enabled or disabled without changing any of theon or off times and also determines whether thestatus output turns on and off once or twice in eachtwenty four hour period.

Select 5tat in the configuration menu and press (which will result in the EnbL prompt being displayed.Pressing ( again will enter the sub-function fromwhich one of the three options may be selectedusing the * or & button:

Display Status outputoFF Status output disabledon : 1 Turns on & off once per 24 hourson : 2 Turns on & off twice per 24 hours

When the required option is displayed operating )will enter the selection and return to the EnbL promptfrom which another sub-function may be selected.

9.4.9 On and off times: 5tat:on 1; 5tat:off 1

5tat:on 2; 5tat:off 2

The status output will have one or two on and offtimes depending upon whether it has beenconfigured to turn on and off once or twice in each24 hour period. - see 9.4.8.

All of the times are adjusted in the same way. Toadjust any of them select 5tat from the configurationmenu and press ( which will result in the EnbLprompt being displayed. The * or & button willscroll through the sub-functions. Only 5tat:on 1 and5tat:off1 will be present if the status output hasbeen configured to switch on and off once in a 24hour period in the EnbL sub-function.

Select the required sub-function

5tat : on1 Time status output turns on first time5tat : oFF1 Time status output turns off first time5tat : on 2 Time status output turns on second time5tat : oFF2 Time status output turns off second time

When selected, pressing ( will show the existingtime with the hours flashing. Using the * or &

button adjust the hours and then press ( totransfer control to the minutes display, pressing (

again will transfer control to the seconds display.When the time has been set as required press ) toreturn to the sub-menu from which another on / offtime may be selected for adjustment. When all theon / off times have been entered, return to theconfiguration menu by pressing the ) button twice.

9.4.10 Control output 1: oP1Control output 1 is an optional factory fittedgalvanically isolated solid state switch contact outputwhich can be configured to turn on (output closed)and off (output open) twice in each twenty-four hourperiod. The control output status is shown by the 1control output display annunciator.

Function oP1 contains a sub-menu with five sub-functions:

EnbL Number of times output 1turns on & off in 24 hours.

oP 1 : on 1 First time oP 1 turns on (closes)oP 1 : oFF 1 First time oP 1 turns off (opens)oP 1 : on 2 Second time oP 1 turns on (closes)oP 1 : oFF 2 Second time oP 1 turns off (opens)

To check or change the function of Control output 1select oP1 from the configuration menu and press( which will reveal the first sub-function EnbL.

49

9.4.11 Enable Control output 1: EnbL

This is a sub-function in the Control output 1 functionoP1 which allows output 1 to be enabled or disabledwithout changing any of the on or off times and alsodetermines whether output 1 turns on and off onceor twice in each twenty four hour period.

Select oP1 in the configuration menu and press (

which will result in the EnbL prompt being displayed.Pressing ( again will enter the sub-function fromwhich one of the three options may be selectedusing the * or & button:

Display Control output 1oFF Control output 1 disabledon : 1 Turns on & off once per 24 hourson : 2 Turns on & off twice per 24 hours

When the required option is displayed operating )will enter the selection and return to the EnbL promptfrom which another sub-function may be selected ifcontrol output 1 has not been disabled.

9.4.12 On and off times: oP 1 : on 1; oP 1 : off 1

oP 1 : on 2; oP 1 : off 2

The control output will have one or two on and offtimes depending upon whether control output 1 hasbeen configured to turn on and off once or twice ineach 24 hour period. - see 9.4.11.

All of the times are adjusted in the same way. Toadjust any of them select oP1 from the configurationmenu and press ( which will result in the EnbLprompt being displayed. The * or & button willscroll through the sub-functions. Only oP 1 : on 1 andoP1 : oFF1 will be present if control output 1 has beenconfigured to switch on and off once in a 24 hourperiod in the EnbL sub-function.


oP1 : on1 Time oP1 turns on first timeoP1 : oFF1 Time oP1 turns off first timeoP1 : on2 Time oP1 turns on second timeoP1 : oFF2 Time oP1 turns off second time

When selected, pressing ( will show the existingtime with the hours flashing. Using the * or &



9.4.13 Control output 2: oP2Control output 2 is an optional factory fitted outputwhich can be configured to turn on (output closed)and off (output open) twice in each twenty-four hourperiod. The control output status is shown by the 2control output display annunciator.

Function oP2 contains a sub-menu with five sub-functions:

EnbL Number of times output 2turns on & off in 24 hours.

oP 2 : on 1 First time when oP 2 turns on (closes)oP 2 : oFF 1 First time when oP 2 turns off (opens)oP 2 : on 2 Second time when oP 2 turns on (closes)oP 2 : oFF 2 Second time when oP 2 turns off (opens)

To check or change the function of Control output 2select oP2 from the configuration menu and press( which will reveal the first sub-funtion EnbL.

9.4.14 Enable control output 2: EnbL

This is a sub-function in the Control output 2 functionoP2 which allows output 2 to be enabled or disabledwithout changing any of the on or off times and alsodetermines whether output 2 turns on and off onceor twice in each twenty four hour period.Select oP2 inthe configuration menu and press ( which willresult in the EnbL prompt being displayed. Pressing( again will enter the sub-function from which oneof the three options may be selected using the * or& button:

Display Control output 2oFF Control output 2 disabledon : 1 Turns on & off once per 24 hourson : 2 Turns on & off twice per 24 hours

When the required option is displayed operating )will enter the selection and return to the EnbL promptfrom which another sub-function may be selected ifcontrol output 2 has not been disabled.

9.4.15 On and off times: oP2 : on 1; oP2 : off 1

oP2 : on 2; oP2 : off 2

The control output will have one or two on and offtimes depending upon whether control output 2 hasbeen configured to turn on and off once or twice ineach 24 hour period. - see 9.4.14.

All of the times are adjusted in the same way. Toadjust any of them select oP2 from the configurationmenu and press ( which will result in the EnbLprompt being displayed. The * or & button willscroll through the sub-functions. Only oP21 : on 1

and oP2 : oFF1 will be present if control output 2 hasbeen configured to switch on and off once in a 24hour period in the EnbL sub-function.

50


oP2 : on1 Time oP2 turns on first timeoP2 : oFF1 Time oP2 turns off first timeoP2 : on2 Time oP2 turns on second timeoP2 : oFF2 Time oP2 turns off second time

When selected pressing ( will show the existingtime with the hours flashing. Using the * or &



9.4.16 Access control output on and off times from display mode: AC5P

This function activates a separate menu thatprovides direct access to the control output's on andoff times when the Clock is is the display mode(displaying time). An operator may therefore adjustthe on and off times without having access to theinstrument configuration menu. Further protection isprovided by a separate security code. When thisfunction is enabled the on and off times of the twocontrol outputs may be adjusted from the displaymode by simultaneously operating the ( and *

push buttons. The function contains two sub-functions, EnbL which activates the function and ACCd

which defines a separate access code that may beused to prevent the on and off times beingaccidentally adjusted from the display mode.

To check or change the function, select AC5P in theconfiguration menu and press ( which will revealthe EnbL prompt, pressing ( again will show if thefunction is on or oFF. If adjustment of the controloutput times from the display mode is not requiredpress the * or & button to select off and thenpress ) twice to return to the configuration menu.If the function is required, select on and press ) toreturn to the EnbL prompt from which ACCd, whichallows a separate access code to be entered, can beselected by pressing the * or & button.

Access to the control output times from the displaymode may be protected by a four digit alphanumericsecurity code which must be entered to gain access.Default security code 0000 allows unrestrictedaccess. With ACCd displayed, press ( to enter anew access code. The BA378E Clock will display0000 with one digit flashing. The flashing digit maybe adjusted using the * or & push button, whenset as required operating the ( button will transfercontrol to the next digit. When all the digits havebeen adjusted press ) twice to return to the AC5P

prompt in the configuration menu. The revisedsecurity code will be activated when the BA378E isreturned to the display mode.


Access to the instrument's configuration menu maybe protected by a four digit alphanumeric securitycode which must be entered to gain access. Newinstruments are configured with the default securitycode 0000 which allows unrestricted access to allconfiguration functions.

To enter a new security code select CodE from theconfiguration menu and press ( which will causethe Clock to display 0000 with one digit flashing. Theflashing digit may be adjusted using the * or &

push button, when set as required operating the (button will transfer control to the next digit. Whenall the digits have been adjusted press ) to returnto the CodE prompt. The revised security code will beactivated when the Clock is returned to the displaymode.

Please contact BEKA associates sales department ifthe security code is lost.

9.4.18 Reset configuration to factory defaults:r5Et dEF

When the BA378E is configured as a Clock, thisfunction resets the configuration to the Clock factorydefaults shown in sections 9.4 of this manual.

To reset the instrument configuration selectr5Et dEF from the configuration menu and press (.The Clock will display 0000 with the first digit flashingwhich is a request to confirm the instruction byentering 5urE. Using the * or & button set thefirst flashing digit to 5 and press ( to transfercontrol to the second digit which should be set to u.When 5urE has been entered pressing the ) buttonwill reset all the configuration functions to the factorydefaults and return the instrument to the displaymode as a Clock with default configuration.

51

10. CLOCK CONFIGRATION EXAMPLEIn this example a BA378E is required to function asa Clock. Time is to be displayed in a 24 hour formatincluding seconds. For external synchronisation thedisplayed time is required to change to 12 : 00 : 00

when the external reset terminals are connectedtogether.

Both control outputs are required to close and openonce in each 24 hour period. Control output 1 (oP1)is to turn on (close) at 07 : 30 : 00 and off (open) at09 : 30 : 00, control output 2 (oP2) is to turn on (close)at 18 : 00 : 00 and off (open) at 22 : 30 : 00.

For this application the operator needs to adjust thecontrol output on and off times from the displaymode via an access code of 1111. To preventtampering the instrument configuration menu is to beprotected by security code of 1209

10.1 Configuration procedureThe BA378E may be configured as a Clock on-sitewithout disconnection from external wiring.

Step 1 Enter the configuration menuEnter the configuration menu bysimultaneously pressing ( and ).Assuming a security code has not alreadybeen entered the instrument will respond bydisplaying FunCtion which is the first item inthe configuration menu. See Fig 20.

Step 2 Configure instrument as a ClockWith FunCtion displayed press ( to revealthe existing function of the instrument. IfCloc is displayed no change is required,therefore return to the FunCtion prompt bypressing the ) button.If ELAP5E is displayed, press the * or &button to change the setting to CLoC

followed by the ( button which will result ina 0000 prompt being displayed with the firstdigit flashing. This is a request for theinstruction to be confirmed by entering 5urE

using the & or * button to adjust theflashing digit and the ( button to movecontrol to the next digit. Pressing ) willthen change the instrument to a Clock andreturn the display to FunCtion in theconfiguration menu.See 9.4.3

Step 3 Select display formatUsing the * or & button select di5PLAY inthe configuration menu and press ( whichwill reveal the current display format. Usingthe * or & button select 24 : 00 : 00 which isthe required 24 hour format with secondsand press ) to enter the selection andreturn to the configuration menu.See 9.4.4

Step 4 Enter the synchronisation timeUsing the * or & button select 5YnC t inthe configuration menu and press ( toreveal the current synchronisation time withthe hours flashing. Using the * or &

push button adjust the hours to 12 and press( to transfer control to the minutes. Usingthe * or & push button adjust the minutesto 00 and press ( to transfer control to theseconds which should be adjusted to 00, inthe same way. When the seconds are setenter the selection and return to the r5Et

prompt in the configuration menu bypressing the ) button.See 9.4.6

Step 5 Enable control output 1 and enter the onand off times.Using the * or & button select oP1 in theconfiguration menu and press ( to revealthe EnbL prompt in the control output 1 sub-menu.

In this application control output 1 isrequired to turn on and off once every 24hours. With EnbL displayed press ( andusing the * or & button select on 1

followed by the ) button to return to theEnbL prompt.

The control outputs on time should now beentered by selecting oP1 : on1 in the controloutput 1 sub-menu using the * or &

button. Pressing ( will reveal the existingon time which should be adjusted to07 : 30 : 00 using the * or & button and the( button to transfer control to the followingdigits. When entered return to the oP1 : on1

prompt by pressing the ) button.

The off time should now be entered byselecting oP1 : oFF1 from the sub-menu andadjusting the time to 09 : 30 : 00. Finally press) to return to the oP1 : oFF1 prompt inthe sub-menu and press ) again to returnto oP1 in the configuration menu.

52

Step 6 Enable control output 2 and enter the onand off times.Using the * or & button select oP2 in theconfiguration menu and press ( to revealthe EnbL prompt in the control output 2 sub-menu. Follow the procedure described instep 5 above, but set control output 2 to turnon at 18 : 00 : 00 and off at 22 : 30 : 00.

Step 7 Allow control outputs times to beadjusted from the display mode & enterseparate security code.Using the * or & button select AC5P in theconfiguration menu and press ( to revealthe EnbL prompt, pressing ( again willshow if this function is on or oFF. Using the* or & button select on followed by ) toreturn to the EnbL prompt. A separatesecurity code which must be entered to gainaccess to the alarm times in the displaymode, is entered in the ACCd function whichmay be selected by operating the * or &button once. Pressing ) will reveal theexisting access code with one digit flashing.This should be changed to the requiredcode of 1111 by adjusting the flashing digitusing using the * or & button and the (button to transfer control to the next digit.When 1111 has been entered press )

twice to return to the configuration menu.See 9.4.16

Step 8 Define the configuration menu securitycode.Defining a security code preventsunauthorised access to the configurationmenu. Using the & and * buttons selectCodE from the configuration menu and press( which will reveal 0000 with the first digitflashing. This example requires the securitycode to be 1209, using the & and *

buttons set the flashing digit to 1 and press( to transfer control to the second digit.When all have been entered press ) toreturn to the main configuration menu.See 9.4.17.

Step 9 Return to the display modeThe BA378E is now configured as requiredfor this example. Pressing the ) buttonwill save the configuration and return theBA378E to the display mode with all thedigits flashing indicating that the set timehas to be entered.

Step 10Enter the set timeFinally the current time to be displayed bythe Clock should be entered. Re-enter theconfiguration menu by pressing the ( and) buttons simultaneously which will resultin code being displayed. Pressing ( willallow the access code 1209 to be enteredusing the & or * button to adjust theflashing digit and the ( button to transfercontrol to the next digit. When all four digitshave been adjusted, press ( to enter theconfiguration menu and using the & or *button select 5Et and press ) which willreveal 00 : 00 : 00 with the hours flashing.Using the & or * button adjust theflashing hours digit and press ( to transfercontrol to the minutes and then to theseconds. When all have been set asrequired, press ) to start the clock fromthe entered time and return to the displaymode.

53

11. MAINTENANCE when configured as a clock

11.1 Fault finding during commissioningIf a BA378E fails to function as a Clock duringcommissioning the following procedure should befollowed:


No display No power supply, orincorrect wiring.

Note: Terminals 2 &RS2 are

interconnectedwithin the

instrument.


28V on terminals 1& 2 with terminal 1

positive.

That there are noconnections to

terminals3, 4, 5, 6, 7, 8, 9 &

10.

Configuration menudoes not

correspond with theClock section of this

manual.

BA378E isconfigured as a

Timer.

That FunCtion inconfiguration menuis set to CLoC not to

ELAP5E.

Clock displayflashes

'00 : 00 : 00'

Local time has notbeen entered.

Enter the local timein the 5Et functionof the instrument

configuration menu.

Control output(s) donot function.


enabled.


configuration menu.

Clock will not start Reset terminalsRS1 and RS2 are

connected togetherand the Clock is

continuouslysynchronising.

If reset annunciatoron display isactivated, disconnect

connection betweenRS1 and RS2.

Unable to enterconfiguration menu.

Incorrect securitycode


being used.


11.2 Fault finding after commissioning

ENSURE PLANT SAFETY BEFORESTARTING MAINTENANCE

Live maintenance is permitted onintrinsically safe equipment installedin a hazardous area, but only certifiedtest equipment should be used unlessa gas clearance certificate is available.

If a BA378E fails after it has been functioningcorrectly as a Clock, the following table may help toidentify the cause of the failure.


No display No power supply That there isbetween 10 and

28V on terminals 1& 2 with terminal 1

positive.

Clock displayflashes 00 : 00 : 00

Instrument powersupply has beeninterrupted and

local time has beenlost.

Enter the local timein the 5Et functionof the instrument

configuration menu.

Control output(s) donot function.


enabled.


configuration menu.

Clock will not start Reset terminalsRS1 and RS2 are

connected togetherand the Clock is

continuouslysynchronising.

If reset annunciatoron display is

activated, if it isdisconnect

connection betweenRS1 and RS2.

Unable to enterconfiguration menu.

Incorrect securitycode


being used.


If this procedure does not reveal the cause of thefault, it is recommended that the instrument isreplaced.

11.3 ServicingWe recommend that faulty BA378E Clocks arereturned to BEKA associates or to our local agent forrepair.

11.4 Routine maintenanceThe mechanical and electrical condition of theinstrument should be regularly checked. Inspectionfrequency should be chosen to suit theenvironmental conditions.

11.5 GuaranteeInstruments which fail within the guarantee periodshould be returned to BEKA associates or our localagent. It is helpful if a brief description of the faultsymptoms is provided.

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11.6 Customer commentsBEKA is always pleased to receive comments fromcustomers about our products and services. Allcommunications are acknowledged and wheneverpossible, suggestions are implemented.

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Appendix 1 IECEx certification

A1.0 The IECEx Certification SchemeIECEx is a global certification scheme for explosionprotected products which aims to harmoniseinternational certification standards. For additionalinformation about the IECEx certification schemeand to view the BEKA associate certificates, pleasevisit www.iecex.com

A1.1 IECEx Certificate of ConformityThe BA378E Two input Timer or Clock has beenissued with an IECEx Certificate of Conformitynumber IECEx ITS 16.0004X which specifies thefollowing certification code:

Ex ia IIC T5 Ga -40ºC ≤ Ta ≤ +70ºC.

The IECEx certificate may be downloaded fromwww.beka.co.uk, www.iecex.com or requested fromthe BEKA sales office.

A1.2 InstallationThe IECEx intrinsic safety parameters are identicalto the ATEX safety parameters described in the mainsection of this manual and both refer to the samestandards. Therefore the ATEX installationrequirements specified in sections 2 and 3 of thismanual may be used for IECEx installations, but thelocal code of practice should also be consulted.

A1.3 Special conditions for safe useThe IECEx certificate has an ‘X’ suffix indicating thatspecial conditions apply to prevent an electrostaticcharge developing on the outside of the instrumentenclosure.

WARNINGTo avoid an electrostatic charge being

generated instrument enclosure shouldonly be cleaned with a damp cloth.

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Appendix 2 ETL & cETL certification forinstallations in USA and Canada

A2.0 cETL MarkFor installations in the USA and Canada, theBA378E Two input Timer or Clock has ETL andcETL intrinsic safety and nonincendive approval,Control Number 4008610. Copies of theAuthorisation to Mark are available from the BEKAassociates sales office and www.beka.co.uk

A2.1 Intrinsic safety approvalThe US and Canadian standards used forassessment and certification of the BA378E arelisted on the cETL Authorisation to Mark.

Installations must comply with BEKA associatesControl Drawing CI330-52, which is attached to thisappendix.

The ETL safety parameters are the same as theATEX and IECEx parameters, the systems shown insections 2 and 3 of this manual may therefore alsobe used for US and Canadian installations subject tocompliance with the local codes of practice.

ETL and cETL intrinsic safety codes

CL I Div 1 Groups A, B, C, D T5 (US IS gas, Div cert) CL II Div 1 Groups E, F, G. CL III (US IS dust, Div cert)

CL I Zone 0 AEx ia IIC T5 Ga (US IS gas, Zone cert)Ex ia IIC T5 Ga (Canadian IS gas, Zone cert)

-40ºC Ta 70ºC

A2.2 Nonincendive approvalThe BA378E Two input Timer or Clock also has ETLand cETL nonincendive approval allowinginstallation in Division 2 hazardous (classified)locations without the need for Zener barriers orgalvanic isolators.

Installations must comply with BEKA associatesControl Drawing CI330-53, which is attached to thisappendix, and with the local codes of practice.

ETL and cETL nonincendive codes US & Canada

CL I Div 2 Groups A, B, C, D T5CL II Div 2 Groups F, G CL III Div 2-40ºC Ta 70ºC

ba378e intrinsically safe two input timer and clock · 2.1 atex gas certification 2.2 zones, gas...

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