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Safety Series Isolator and SplitterSSX/SST

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The rugged metal DIN housing of the SSX/SST Safety Series Isolator and Splitter snaps securely onto G-type and Top Hat rails.

April 2015

Features• exida certified IEC 61508:2010. exida has certifiedtheSSX/SSTforuseinanSISuptoSIL3inmonitormode,whereonlytheinputcircuitispartofthesafetyfunction.Forsingleusemode,theSSX/SSTisapprovedforuseinanSISuptoSIL2.

• Comprehensive FMEDA certified safety data.Uponrequest,exida-certifiedFMEDAdataisprovidedtobeusedbyafunctionalsafetypractitionertodeterminetheSST’sandSSX’sapplicabilityinspecificsafety-relatedapplications.

• Valuable HART data not lost . BoththeSSXandSSTpasscriticalHARTdatatoassetmanagementsystems,programmingdevicesorhostsystems.

• Split signals between two locations. The4-WireSSTtakesinonesignalandgivesyoutwofullyisolatedoutputsthatcanbetakentotwoseparatereceivingdevices.Thisfacilitatesmaintenanceoneitheroutputloopwithoutlosingthesignalontheotheroutputloop.

• RFI/EMI Protection. Standard20V/mprotectionofferedtoprotectagainstharmfuleffectsofradiofrequencyandelectromagneticinterference.

• Transmitter excitation.The4-wireSSTiscapableofprovidinglooppowertoa2-wiretransmitterthatisconnectedtoitsinput.

2015MooreIndustries-International,Inc.

Description PartofMooreIndustries’FS Functional Safety Series,theexida® approved, SIL3capable2-wire(looppowered)SSXand4-wire(line/mainspowered)SSTSafetyIsolatorsandSplittersprovideisolationandsignalconversionforyourSIS(SafetyInstrumentedSystem)needs.TheseunitsprotectandenhanceloopsandalsopassvaluableHART® datafromthefieldtransmittertohostsystemsandvice-versa. Isolate your SIS fromyourBasicProcessControlSystemormonitoringsystemsodisconnectionsorfailurestothesesecondarysystemsdon’taffectyoursafetysystem.FMEDA(FailureModeEffectsandDiagnosticAnalysis)reportsareavailablewiththerequiredsafetydatatoensurethatriskreductionrequirementsaremet(SeeFigure1).

Protect your safety systemfromsurges,spikesandtransientsinthefield.With1500Vrmsisolatingcapability,theSSX/SSTprotectsyoursafetyI/Ocardsandsystemfromtherigorsofplantenvironments.

With built-in HART pass-through technology youcanrestassuredthatwhenyourloopsuseHARTtransmittersthatcriticalandvaluableHARTdiagnostic,process,andcalibrationinformationcanbereadoneithersideoftheSSX/SST.Mostallotherisolatorsblockand“stripoff”theHART signal.

Figure 1. The 2-wire SSX provides safety system isolation while still allowing valuable HART data to pass.

206-792-04D

HARTisaregisteredtrademarkoftheHARTCommunicationFoundation.

opto isolation

SSX

Logic Solver(e.g. Safety System

or DCS)

Monitor/Control System(e.g. DCS, or

Asset Management System)

24V

Certifications (See Page 2 for details)

Safety Series Isolator and Splitter SSX/SST

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2-Wire, Loop Powered SSXTheSSXisa2-wireisolator,drawingpowerfromtheoutputsideoftheloop.Typically,thisisfromasecondaryreceivingdevicesuchasaDCSorPLC.

Isolation for Safety Systems UsetheSSXtoisolateyourSISfromyourbasicprocesscontrolsystem.WhilepowerfortheSSXisderivedfromtheoutputsideoftheloop,disconnectionorlossofpowerwillnotaffecttheinputloop’ssignalintegrity.Thisallowsmaintenancetobeperformedonthenon-criticalsideoftheloop(SeeFigure2).

Isolate and Pass Critical HART Data WhenHARTdataisrequiredfordiagnostics,maintenanceorcalibrationtheSSXisabletoisolateandpassHARTdatafromthetransmittertothehostsystem(SeeFigure3).

Stop Ground Loop Noise and Convert Signals Differenceinpotentialbetweenagroundedtransmitterandagroundedreceivingdevicemayresultinunpredictablegroundloopproblemsthatcanleadtosignaldrift.TheSSXbreaksthegalvanicpathbetweenthefieldinstrumentandreceivingdeviceandevenconvertssignalswhenrequired(SeeFigure4).

Solve “Bucking” Power Supplies and Filter HART Whentwodevices(suchasa4-wireHARTtransmitterandaDCS)aretryingtosourcepowertothesameloop,theresultisanon-functioningloop.Whenneitherofthedevicescanbeeliminated,thesolutionisanSSX.Itcanoperatewithpoweredinputsfrombothsides,thusrestoringnormaloperationstotheloopwhilealsopassinganyHARTsignals.SometimesolderDCSandPLCinputcardshavetroublewithHARTsignals.WhenthisproblemarisesyoucanordertheSSXwithoptioncode-0HARTandtheSSXwillfiltertheHARTsignal(SeeFigure5).

Figure 3. The SSX passes HART data to asset management systems or other host control and monitoring systems.

Figure 2. The SSX provides isolation for your safety system and still allows maintenance on the output side of the loop.

Figure 5. The SSX solves bucking power supplies. Also, when used with the -0HART option, the SSX acts as a current isolator that stops a HART signal from reaching a PLC, DCS or other receiving device.

Figure 4. The SSX can also serve as a signal converter.

opto isolation

SSX

Logic Solver(e.g. Safety System

or DCS)

Monitor/Control System(e.g. DCS or Asset

Management System)

24V

24V

IN

IN

NON-ISOLATED TRANSMITTERRECEIVER

NON-ISOLATED4-WIRE

TRANSMITTERRECEIVERRECEIVER

+ +

– –

+24V+

– +IN

1-5VIsolated4-20mA

opto isolation

SSX

LOOPPOWERED

NON-ISOLATED TRANSMITTERRECEIVER

4-WIREHART

TRANSMITTERRECEIVERSIS or PLC

+

– –

+24V+

– +IN

Isolated4-20mA

opto isolation

SSX

4-20mA + HART

+24V

NON-ISOLATED TRANSMITTERRECEIVER

4-WIREHART

TRANSMITTERRECEIVERDCS orAsset

ManagementSystem

+ +

– –

+24V+

– +IN

4-20mA + HART 4-20mA + HART

opto isolation

LOOPPOWERED

SSX

Certifications

CE Conformant -EMCDirective2004/108/ECEN61326;LowVoltageDirective-2006/95/ECEN61010

exida Certified - IEC615082010FunctionalSafetyofElectrical/Electronic/ProgrammableElectronicSafety-RelatedSystems

FM Approvals (FM Global): Non-Incendive ClassI,Division2,GroupsA,B,CandDTemperatureClassT4,Tamb=-40°Cto+85°C

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4-Wire Line/Mains Powered SST and SST SplitterTheSSTisa4-wireunitpoweredby24DC,117ACor230AC.Itisdesignedforapplicationswhereline/mainspowerisreadilyavailable,suchasthebackofapanelorinsideofacontrolroom.

HART Splitter: “Sharing” or “Splitting” Process Signals TheSSTSplittertakestheinputfromoneofyourprocesssignalsandcreatestwoidentical,completelyisolatedoutputstotwoseparatemonitoringorcontroldevices.Additionally,theSSTfunctionsasaHARTsplitterthatpassesvaluableHARTdatatooneorbothoftheSST’sindependentoutputs.ThisisespeciallyimportantwhenassetmanagementsystemsneedtomaintainadigitalHARTconnectionwithcriticalvalvesorinstrumentsfordiagnosticmonitoringorcalibrationrecordkeeping.ThisalsomakesitveryconvenientwhenusingHARThandhelds,modemsorprogrammingdevicestoconfigureremotefieldtransmittersfromcontrolrooms(SeeFigure6).

Power a 2-Wire Transmitter Withtheincluded-TXoption,theSSTprovides24Vpowertoa2-wire,output-looppoweredinstrument.Thiseliminatestheneedforanadditionalpowersupply(SeeFigure7).

Single- and Multiple-Unit Instrument Enclosures DesignedtomeetNEMA4XandIP66ratings,theR-BOXistheperfectsolutionforprotectingtheSST/SSXinfieldandcontrolroomapplications.Ruggedandversatile,itdeliversahighimpactstructureandresistancetoultravioletraysandchemicals.TheR-BOXmountsonapipe,panelorsurface,andcomesinavarietyofwidthstoeconomicallyaccommodateseveralSSTsorSSXs.Itfeaturesapre-installedmountingrail;customizableconduitentryoptions;aclearcoverandasecurelockingmechanism.Formoreinformation,seetheR-BOXField-MountEnclosuredatasheet(SeeFigure8).

Figure 6. The SST Splitter takes one process signal and delivers two completely isolated signal outputs. HART data can be passed to one or both outputs.

Figure 7. The standard -TX Transmitter Excitation of the SST allows it to supply loop power to a 2-wire transmitter.

Figure 8. Available in a variety of widths, our R-BOX field-mount instrument enclosure is designed to protect DIN-rail instruments in even the most rugged environments

SSTSplitter

+A +OUT

+

–A – OUT

–

opto isolation

+IN

–IN

AC OR DCPOWER

ISOLATED4-20mA w/ HART

+

B +OUT

–

B –OUT

4-20mA w/ HART

ISOLATED4-20mA w/ HART

4-WIREHART

TRANSMITTER

SIS

PLC

NON-ISOLATED

2-WIRE XMITTER

RECEIVERSST

ISOLATED4-20mA

–

+ +TX +

+IN

+OUT

–OUT –

opto isolation

NON-ISOLATED4-20mA

AC or DCPower

SafetySeriesIsolatorandSplitterSSX/SST

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Accuracy:±0.1%ofspanStability:+/-0.2%ofreadingperyear Isolation: SSX:500VrmsbetweenInput,OutputandCase;SST:500VrmsBetweenInput,Output,CaseandPowerTested To: SSX:1500VrmsbetweenInput,OutputandCasefor1minute;SST:1500VrmsbetweenInput,Output,CaseandDCPowerfor1minute(2300VrmsfromACPowertoInput,OutputandCasefor1minute)Response Time (analog output):100msecmax.to99%ofoutput Input Resistance: 100 ohmsstandard;250ohmswith-IZ250optionInput Overrange Protection: 250%offullscaleRipple: <10mVmeasuredacrossa250ohmresistor

Performance

Adjustments

Weight

Burden:1Vmaximumforcurrent;1MohmminimumforvoltageLoad Effect:0.01%ofspanfrom0-100%ofratedoutput(currentonly)Power Supply: SST:24DC±10%;117AC50/60HZ,±10%;230AC50/60HZ,±10%;SSX:12-42DCPower Consumption:SST:Singlechannel:3wattsmax.;Dualoutputchannel:5wattsmax.Power Supply Rejection:Exceeds90dbforcurrentinputunits Load Capability: SSX: Vs–12Vdc

SST: 1000ohms SST-Splitter:600ohmsperchannel Output Current Limiting: 25mAtypical;30mAmax.Voltage Limit (for -EP only): 30Vdcmax.

Temperature Range: Operating:-40°Cto+85°C(-40°Fto+185°F);Storage:-40°Cto+85°C(-40°Fto+185°F)Temperature Effect: ±0.007%ofspan/°Ctypical;±0.015%ofspan/°Cmax Relative Humidity:5-95%non-condensing RFI/EMI Protection: Lessthan+/-0.1%ofspanerrorwhentestedat20V/m@20-1000MHzCommon Mode Rejection: Exceeds95dBat60Hzwithalimitof1500Vrms

Type:Frontpanelpots Span:±2% Zero:±2% SST:DC:12oz(340g),AC:17oz(482g) SST-Splitter: DC:15oz(425g),AC:20oz(567g) SSX: 8oz(227g)

Performance (continued)

Ambient Conditions

Specifications

Accessories: PartNumber700-702-36

FMEDA Report consistentwithIEC61508-2:2010providingtheinformationnecessarytodesignaSafetyInstrumentedSystem(OnecopyprovidedfreewitheachorderUponRequest)

Ordering Information

SST 4-wire, Line-(Mains)Powered, SafetyIsolatorandSplitter

Unit Input Output Power Options Housing

4-20MA4-20mAinto100ohmswithHARTdigitaldatasuperimposed1-5V* into1Mohm

4-20MA Isolated,4-20mAinto1000ohms(with24Vdc,117Vac, or230Vacpower); withHARTdigitaldatasuperimposed2X4-20MA into600ohmsperchannel(availablewith4-20mAinputonly);HARTdigitaldatasuperimposedonChannelAonly

24DC ±10%117AC 50/60HZ,±10%230AC 50/60HZ,±10%3wattsmaximumforsinglechannelmodels;5wattsmaximumfordualoutputchannelmodels

-IZ250**Increasestheinputresistanceto250ohms -EP***Externalpower,outputspoweredbyexternalsource(onlyavailableon2X4-20mAoutputmodels)-0HARTNoHARTsignalpass-through-2HART***HARTsignalpass-throughonbothchannels-RO***ReverseOutput(bothchannels)

DINUniversalDIN-stylehousingmountson32mmG-typerail(EN50035)oron35mmTopHatrail(EN50022FLBFlangebracketwithtop/bottommountingholes

*HART pass-through not available for 1-5V Input models**-IZ250 only available for 4-20mA Input models***-EP, -RO and -2HART only available for 2X4-20mA Output models

4-20MA4-20mAinto100ohmswithHARTdigitaldatasuperimposed1-5V*into1Mohm

4-20MA Isolated,4-20mAinto600ohms(with24Vdcpower);withHARTdigitaldatasuperimposed

12-42DC -IZ250**Increasestheinputresistanceto250ohms -0HARTNoHARTsignalpass-through

SSX 2-wire, Loop-Powered, SafetyIsolator

Unit Input Output Power Options Housing

When ordering, specify:Unit/Input/Output/Power/-Option[Housing]Model number examples:SST/4-20MA/2X4-20MA/24DC/-EP[DIN]SSX/4-20MA/4-20MA/12-42DC/-IZ250[DIN]

20mA

SafetySeriesIsolatorandSplitter SSX/SST

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Figure 10. Dimensions of the SST Isolator in its aluminum DIN-style housing

100mm(4.0 in)

119mm(4.7 in)

124mm(4.8 in)

131mm(5.1 in)

136mm(5.3 in)

CL

47mmREF.

53mm(2.1 in)REF.

(1.8 in)

REF.

REF.

35mm(1.4 in)

Figure 9. Dimensions of the SSX Isolator in its aluminum DIN-style housing

25mm(1.0 in)

100mm(3.9 in)

119mm(4.7 in)

124mm(4.8 in)

131mm(5.1 in)

136mm(5.3 in)

CL

47mmREF.

53mm(2.1 in)REF.

(1.8 in)

REF.

REF.

Safety Series Isolator and Splitter SSX/SST

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United States • info@miinet.comTel: (818) 894-7111 • FAX: (818) 891-2816

Australia • sales@mooreind.com.auTel: (02) 8536-7200 • FAX: (02) 9525-7296

Belgium • info@mooreind.beTel: 03/448.10.18 • FAX: 03/440.17.97The Netherlands • sales@mooreind.nl

Tel: (0)344-617971 • FAX: (0)344-615920

China • sales@mooreind.sh.cnTel: 86-21-62491499 • FAX: 86-21-62490635

United Kingdom • sales@mooreind.comTel: 01293 514488 • FAX: 01293 536852

Specificationsandinformationsubjecttochangewithoutnotice.

Figure 11. Dimensions of the SST Splitter in its aluminum DIN-style housing

100mm(3.9 in)

119mm(4.7 in)

124mm(4.8 in)

131mm(5.1 in)

136mm(5.3 in)

CL

47mmREF.

53mm(2.1 in)REF.

(1.8 in)

REF.

REF.

45mm(1.8in)

Figure 12. The SST Splitter and the SST and SSX Isolators mounted with the FLB flange bracket and the bracket’s dimensions.

23mm(0.9 in)

18mm(0.7 in)

9mm(0.4 in)

2 mm(0.1 in)

11mm(0.4 in)

143mm(5.6 in)

121mm(4.8in)

Ø6mm(Ø0.3 in)