Emerson PACSystems RSTi-EP - Page 514

User Manual Section 12
GFK-2958L May 2021
LED Indicators and Troubleshooting 500
Module
LED
Status
Recommended action
—
Error in the supply voltage
—
Channel error
—
Check the supply voltage
—
check +24 V input current path
—
Check voltage on plug 4.3; in case
of cascading 0 V might be
properly, therefore this is not an
error
—
Check channel error
—
Overload at the OSSD output level
—
Remove cross connection at OSSD
—
External feed-in recognized from field
side
—
Measure voltage at OSSD pin (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.
—
Internal error detected
—
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 Emerson for a
technical examination.
—
Interruption in one of the two safety
loops of a safety circuit for at least 3
seconds.
—
Check safety circuit for
interruptions if an interruption of
the safety channel is not part of
the application.
—
Cross connection between the safety
loops for at least 3 seconds.
—
Check safety circuit for cross
connections.
1.1
Off: Safety circuit 1 interrupted
Yellow: Safety circuit 1 OK
—
Check safety circuit 1
4.2
Off: OSSD not active
Yellow: OSSD active, 24Vdc at output
—
4.3
Green: Feed-in voltage in valid range
—
EP-1902
EP-1922
Status LED
—
Red:
—
Module has not been snapped properly
—
Error in the supply voltage
—
Channel error
—
Check that the module has been
snapped into place properly
—
Check the supply voltage
—
check +24 V input current path
—
Check voltage on plug 4.3; in case
of cascading 0 V might be
properly, therefore this is not an
error