Use the complete nameplate and ABB Procontic CS31 hardware documentation when assessing conformity. The host cabinet, field wiring, overcurrent protection and protective-earth arrangement determine the applicable installation requirements; no undocumented third-party certification is assumed.

Relay loads must remain within the published duty and isolation limits, and all work must follow the applicable local electrical-safety rules.

The unit is intended as a remote module on the CS31 system bus and mounts on the mechanically coded ECZ plug-in base. Confirm the FPR3312101R0024 reference, supply variant, bus address and controller configuration before replacement.

Verify the channel mapping, relay load category and isolation arrangement against the installed project before recommissioning. Retain the documented bus termination and station addressing.