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SPEED MONITORING RELAYModel number : SMR-C03

YSL Electronics

DEVICE DESCRIPTION

SMR-C03 can indicate and monitor the speed of rotating shafts that occur in areas of automation and process control applications. The rpm is measured in accordance to the period of the input signal. The device can also measure actual rpm of slow processing applicationswhere signal sensors provide many pulses per revolution. The measured rpm is indicated by a 4-digit, 7-segment LED display on the front of the device, with up to two places after the decimal point. The device speed sensing range is 1 to 9999 rpm. High, low speed limit and other parameters can be set based on the nominal operating speed of the process that is monitored. A relay contact is switched depending on the operating condition of the monitored system(MS). Relay activation delay and by-pass/power-ON delay parameters can be set appropriately. The relay activation delay can totally obviate the requirement for the subsequent addition of a timer relay. After powering up the device, the by-pass/power-ON override delay is initiated, which prevents error signals during the running up of the MS.

FRONT VIEW AND TERMINAL ASSIGNMENT

Terminal Assignment/Electrical Connection

HIGH

LOW

SIG

Indications rpm > high speed limit rpm < low speed limit

sensor signal state

Function

1

Supply voltage 24V DC

Operating voltage range

Power consumption

TECHNICAL SPECIFICATION

Power supply for sensor

Outputs

+24V DC, 0V DC ; 50 mA

19-28V DC

< 2 W

Signal Input

Sensor

SET key

Relay

NPN NO / PNP NO

1 C/O Contact rating: 250V AC, 10A resistive load

INC key

DEC key

ESC key

Set key

Increment key

Escape key

Decrement key

Key Inputs

PNP

+24V, DC 1,11

2

3

4

13

12

14

15

16

5, 6, 7, 8, 9, 10

0V

NPN

+24V

0V

NO

NC

COM

Power supply for sensors

NPN sensor input

PNP sensor input

Device power supply connection

Normally open

Normally closed

Common

No connection

} Relay Contacts

www.yslelectronics.com YSL Electronics

YSL Electronics, No 42, KHB Industrial Area, Yelahanka, Bengaluru:560064 Tel:91-80-28461413 Fax: 41685423 [email protected]. . .

Front view

SET

INC

DEC

ESC

HIGH

LOW

SIG

YSL Electronics SMR- C03

Terminal side view

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

Figure 190mm

45

mm

Figure 2

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The device monitors the speed of MS. If the speed is within the specified range( within the high and low speed limits) the operating condition is normal. But if the speed is out of the specified range the operating condition is treated as abnormal and the relay is activated. The operation is graphically shown in figure 3. The high/low speed hysteresis value is calculated based on the current set , speed parameter respectively as shown in the table 1.01 below. For example if the high speed limit ( ) is set to 2000, the high hysteresis value will be 5% of high speed limit, which equals to 100 rpm. Similarly if low speed limit( ) is set to 1500, the low hysteresis value will be 5% of low speed limit, which equals to 75 rpm.

Display Messages

DEVICE OPERATION

YSL Electronics

Set low speed

Set high speed

High speed hysteresis

Low speed hysteresis

Time

Speed in rpm

0

Power ON delay

Relay state

Figure 3

If there is a discontinuous/abrupt decrease in current calculated rpm compared to previously calculated rpm or if there is no input signal after power ON

Message Description

Signal OverflowSignal Loss/Disconnection

Signal Underflow Input signal has fallen below the minimum measuring range, i.e. rpm < 1 Input signal is above the maximum measuring range, i.e. rpm > 9999

Symbol

Speed SettingError

Speed parameter setting error ( )The low speed( ) and high speed( ) parameters must always be set such that, low speed < high speed. If this is violated, error message is displayed and the user must press ESC key and again set proper values

1 < high/low < 10

10 < high/low < 20

20 < high/low < 60

high/low > 60

1 2

3

5% of high/low

High/Low hysteresis(rpm)/ (rpm)

-

Table 1.01

-

-

-

2



Speed Monitoring

SET

Menu Parameters Setting

SET

SET

SET

SET

SET

ESC

ESC

ESC

ESC

ESC

Sub Menu

ES

C

Main Menu

DEC

DEC

DEC

DEC

INC

INC

INC

INC

INC

Factory Preset XXX = 11 < XXX < 100

Number of pulses per revolution

1 < XXXX < 9500 Factory Preset: XXX = 500

Low Speed limit switching point

1 < XXXX < 9999 Factory Preset: XXXX = 1000

High speed limit switching point

1 < XXX < 999 Factory Preset: XXX = 1

Power ON / By-pass delay

0 < XXX < 999 Factory Preset: XXX = 1

Delay for relay activationXXX

XXX

XXX

XXX

XXX

XXX

XXX

XXXX

XXXX

SET

XXX

MENU PARAMETERS AND SETTINGS

YSL Electronics

To enter into menu, press SET key continuously for about 1.5s. The display shows confirming that the unit is now in menu mode. Press INC/DEC keys to scroll through/select main menu parameters.To edit the value of a parameter, first select the parameter from the main menu and then press SET key to enter into submenu. The LSD of the parameter value will be blinking. Now the LSD value can be set/edited using INC/DEC keys. To select the next digit position press SET key. In order to return to the main menu press ESC key. When ESC key is activated in the main menu all the set parameters are saved in internal memory and the device will enter into the monitoring mode. Refer figure 4 and menu parameters section below for more details.

Menu Parameter Setting Procedure

Figure 4

3



Menu Parameters

YSL Electronics

The relay output switching delay is set using parameter. Refer figure 4 for parameter settings.

Specifies the number of pulses obtained from sensor per revolution. This parameter is helpful while measuring rpm of slow moving targets.Example:The nominal speed of a MS is 2 rpm and sensor gives 1 signal/revolution, i.e. is set to 1. For this setup, the SMR-03 unit takes 30s to calculate rpm. If the setup is modified such that the sensor gives 5 signals/revolution, i.e. = 5, then the unit can calculate rpm in 6s. Refer figure 4 for parameter settings.

The by-pass/power ON delay is set using menu parameter. After device power ON, the bypass/power ON delay is activated.When the bypass time is active the device treats the MS to be operating well within the set limits, irrelevant to the actual operating state of the MS and the relay will be switched to normal state. After the expiry of bypass time, the relay state will be switched according to the actual operating state of MS. Refer figure 4 for parameter settings.

The operating low speed limit of MS is specified using parameter. Refer figure 4 for parameter setting. The general method to set the low speed parameter is < .

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The operating high speed limit of MS is specified using parameter. Refer figure 4 for parameter setting. The general method to set the high speed parameter is < .

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