66 Rockwell Automation Publication 440R-UM013F-EN-P - July 2021
Chapter 11 Troubleshooting
Figure 73 - Momentary Interruption of SWS Input
Check the Reset/Monitoring
Circuit (Step 5)
The OUT status indicator blinks green when the inputs to the GSR safety relay
are satisfied and the GSR safety relay is ready to turn on its outputs. The OUT
status indicator flashes green at a 1 Hz rate. The GSR safety relay is waiting for
the appropriate reset signal at terminal S34.
If the OUT status indicator is flashing green, but the relay does not turn on its
outputs when the reset button is pressed, measure the voltage at terminal S34
(point 1) as shown in Figure 74
. If 24V is not present when the reset button is
pushed, then check the other connections (points 2...7) in the circuit. If 24V is
present at terminal S34, then you must consider the reset configuration:
• Automatic/Manual: The GSR safety relay must be replaced as the output
indicator must turn steady green as soon as the voltage was present at
terminal S34.
• Monitored/Manual: If the output indicator does not turn steady green
when voltage at S34 is present between 0.25…3 seconds, then GSR safety
relay must be replaced.
Figure 74 - Measure Reset/Monitoring Circuit Voltage
Command to open SWS
SWS opens
SW closes in 5.7 ms
The Downstream unit
turns off its Output
The Downstream unit
turns its Output back
on auto-reset
+24V DC
24V DC Com
S34
OUT
A1
A2
1
2
3
4
5
6
7
24
Volts
DMM
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