54 Rockwell Automation Publication 440R-UM013G-EN-P - December 2022
Chapter 11 Troubleshooting
Figure 58 - Troubleshooting Flowchart
View the PWR/Fault Status
Indicator (Step 1)
The first troubleshooting step is to examine the PWR/Fault status indicator on the front of your
GSR safety relay module. See Figure 59
for status indicator location.
Figure 59 - PWR/Fault Status Indicator
The PWR/Fault status indicator has five possible states.
Start
OUT status indicator is steady green
The safety relay is functioning properly
PWR/Fault indicator
steady green?
Flashing
Go to Step 1
(page 54
)
Go to Step 3
(page 58
)
Go to Step 4
(page 64
)
OUT indicator
flashing green?
Output devices
energized?
Go to Step 5
(page 66
)
No
No
No
Yes
Yes
Yes
No
Yes
Go to Step 6
(page 67
)
IN indicator steady
green?
LOGIC IN indicator
steady green?
Off
Go to Step 2
(page 56
)
No
B1/B2 inputs of EMD
relay used?
No
Go to Step 7
(page 74
)
Yes
Yes
The PWR/Fault status indicator is in the same position on all GSR safety relay
modules.
Status Description Action
Off No power to the safety relay Apply power
Steady green The safety relay is in the run state None
Steady red The safety relay is in a nonrecoverable faulted state See Table 11 on page 55
Flashing red A nonrecoverable/recoverable faulted state See Table 12 on page 55
Green and flashing red A recoverable faulted state See Table 13 on page 56
IMPORTANT For accurate diagnostics, always start counting the flashes after the
first pause. The first cycle can be inaccurate.
PWR/Fault status indicator
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