4. Pull the device away from the device connector.
5. Separate the device connectors using a screwdriver.
6. Remove the cover.
Mounting
7.9 Removing 22.5 mm/17.5 mm devices with device connectors from a standard mounting rail
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
136 Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005