Allen-Bradley Guardmaster, User Manual

Page: 74 / 100

74 Rockwell Automation Publication 440R-UM013E-EN-P - March 2017
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 relays have a
100 ms recovery time specification ( 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 nuisance trips.
Figure 70 - Recovery Time
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.
SWS Connections L11 and L12
CI and SI safety relays only have SWS outputs (terminal L11); they do not
have SWS inputs.
DI and DIS safety relays have both SWS input and output signals. If you have a
DI or DIS safety relay and the SWS input signal is not used, then the Logic IN
indicator is always OFF. If no wire is connected to terminal L12, then make
sure that the LOGIC switch is set is to either 1, 2, 5, or 6 (switch positions with
OR logic).
Open
Channel 1
Channel 2
Closed
Open
0 100
Closed
Time (ms)
0 15 100
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 76 .
Off L12 input is inactive (open) See SWS Connections L11 and L12 .