Diagnostic description
102597_en_03 PHOENIX CONTACT 127 / 136
The table is valid for the following safety relays:
1 PSR-URM4/5x1/2x2/B
2 PSR-URM4/4NO/2NC
Table 8-6 Diagnostic description for PSR-URM4/5x1/2x2/B and PSR-URM4/4NO/2NC safety relays
K1/K2
Fault Remedy Valid for
Connection/
voltage error
Supply voltage not present. Apply supply voltage.
All
Supply voltage too low. Adjust supply voltage.
The input circuit is connected incor-
rectly or not connected at all.
Check the input circuit connection
Short circuit
Between contact points A1 and A2. Remove short circuit.
Fault with
internal cause
Checkback contacts 11 and 12
faulty.
Replace safety relays.
Perform a voltage reset.
Enable contact(s) of K1 and K2
faulty.
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