GE RSTi-EP Functional Safety Manual page 71

EP-1902, Status Red:
EP-1922 LED
– Module has not been snapped
– Error in the supply voltage
– Channel error
– Overload at the OSSD output level
– External feed-in recognised from
– Internal error detected
– Interruption in one of the two
– Cross connection between the
1.1 Off: Safety circuit 1 interrupted
Yellow: Safety circuit 1 OK
2.1 Off: Safety circuit 2 interrupted
Yellow: Safety circuit 2 OK
4.1 Off: SS1 not active
(DELAY
Yellow: SS1 active, 24 V DC at output
only)
4.2 Off: OSSD not active
Yellow: OSSD active, 24 V DC at output
4.3 Green: Feed-in voltage in valid range
GFK-2956A
properly
field side
safety loops of a safety circuit for
at least 3 seconds.
safety loops for at least 3 seconds.
November 2017
Chapter 7. LED Indicators and Troubleshooting
– Check that the module has been snapped into place
properly
– Check the supply voltage:
1. check +24 V input current path
2. check voltage on plug 4.3; in case of cascading 0
V might be properly, therefore this is not an error
– Check channel error
– Remove cross connection at OSSD
– Measure voltage at OSSD (4.3) vs. GND (4.4). If a
voltage is present, check the wiring.
Attention: safety hazard! Shut down the system and
prevent it from switching on again.
– Module might have switched off caused by
overtemperature; check the temperature inside the
switch cabinet
– Perform a cold start within 24 hours.
If the error has not been fixed, send the module to GE
for a technical examination.
– Check safety circuit for interruptions if an
interruption of the safety channel is not part of the
application
– Check safety circuit for cross connections
Check safety circuit 1
Check safety circuit 2
67