Weidmuller UR20-4DI-4DO-PN-FSOE Manual page 90

8 LED displays and troubleshooting | Safe I/O modules
UR20-8DI-PN-FSOE, UR20-8DI-PN-FSOE-V2, UR20-8DI-PN-FSPS, UR20-8DI-PN-FSPS-V2
LED Status
Status LED Red:
– Module has not been snapped properly
– Error in the supply voltage
– Internal error detected
– Safety address is not set properly
– PROFIsafe communication failure
Flashes alternating red and green.
– 3 s green / 1 s red: Module is waiting for parameters from the safety
control (e. g. after the power up) or safety address is not set according
to the project plan
– 1 s green / 1 s red: Error pending
1.1 / 1.4 Yellow: Input 0 / 1 active
2.1 / 2.4 Yellow: Input 2 / 3 active
3.1 / 3.4 Yellow: Input 4 / 5 active
4.1 / 4.4 Yellow: Input 6 / 7 active
1.3 Red: Error input 0 / 1
2.3 Red: Error input 2 / 3
3.3 Red: Error input 4 / 5
4.3 Red: Error input 6 / 7
– At least one AUX-O is overloaded or short circuit with the supply voltage
– Readback error on the test pulses of at least one input (e.g. caused by
external short circuit)
– The parameterised discrepancy time of this pair of inouts has been
exceeded
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Recommended action
– Check that the module has been snapped into place properly
– Check supply voltage
– Module might have switched off caused by overtemperature; check the
If the error has not been fixed, send the module to Weidmüller for a technical
examination.
– Check the safety address (e.g. via the web server)
– If no address is displayed in the web server set the safety address again
– Check wiring
– Restart the coupler
– Intervention via the safety control is needed
– Check wiring
– Check parameterisation
If the error has not been fixed, send the module to Weidmüller for a technical
examination.
u-remote IP20 modules for functional safety manual
temperature inside the switch cabinet
as described in section 3.5
1484600000/04/06.2017