24 VDC coil — control circuit fit
The G9SR-EX031-T90-RC runs on a 24 VDC coil, which means it drops straight into a standard 24 VDC control bus without a separate power supply tap. No transformer or AC-to-DC conversion needed — just pull from the same rail that feeds the PLC output cards and fieldbus slices.
Safety Relays category — guarding circuit context
This part sits in the Safety Relays category, which means it is designed for machine-guarding circuits that must meet SIL 3 or PL e per IEC 62061 / ISO 13849. The forced-guided contacts inside the G9SR-EX031-T90-RC mechanically link the N/O and N/C sets so a welded N/O contact prevents the N/C from closing — a requirement for redundant safety paths. In a typical swap scenario, the 24 VDC coil means the relay can be replaced without pulling a separate control transformer fuse. Confirm the terminal numbering matches the existing socket wiring before the old relay comes off the DIN rail.