64 Rockwell Automation Publication 440R-UM013F-EN-P - July 2021
Chapter 11 Troubleshooting
Recovery Time
Recovery time is a delay time that is required, measured from when the relay
outputs turned OFF until they can turn back ON again. GSR safety relays have
a 100 ms recovery time specification (see Figure 70).
The GSR family of safety relays has conservative recovery time specifications.
Actual measurements show the recovery time to be as fast as 20 ms. As a result,
recovery time is unlikely to cause spurious trips.
Figure 70 - Recovery Time
Fast input cycling, where both input channels are cycled simultaneously, has
three outcomes:
• Cycles shorter than 7 ms are ignored.
• Cycles of 7...20 ms: An input cycle causes the output to turn off. The IN1
or IN2 indicator is off and the output is off (even with automatic reset).
Repeated cycles of the input at less than 20 ms cause the output to be off
or on, but a true state is always present. An example in automatic reset: If
the inputs are green, the outputs are green, and if one of the inputs is off,
the output is off.
• Cycles longer than 20 ms are processed properly.
Check the Single Wire
Safety Circuit (Step 4)
The Logic IN status indicator represents the single-wire safety (SWS) signal at
terminal L12. The SWS output is terminal L11.
Check the Logic IN status indicator.
Channel 1
Channel 2
Open
Closed
Open
Closed
Time (ms)
Time (ms)
Table 17 - Logic IN Indicator
Logic IN Indicator Status Action
Green L12 input is active (closed)
Go to Check the Reset/Monitoring Circuit
(Step 5) on page 66.
Off L12 input is inactive (open) See SWS Connections L11 and L12
.
To Next Page
Loading...
Need help?
General
