The PSRswitch safety switch is designed for smart door safety and position monitoring in machines and assembly lines. Machine builders can combine the switch with the PSR-MC42 PSRmini safety relay to take advantage of IO-Link diagnostics to adapt their safety system for an IIoT-enabled future. The device can connect as many as 30 sensors in a series while achieving SIL 3/PL e. The switch provides an RFID noncontact safety door switch system with M12 connections. It can be connected in a series with Y distributors, bridge plugs and SAC cabling.