Safety Relays
Safety relay modules with forcibly guided contacts for e-stop, light curtain and door-lock circuits.
DA31 Emergency-Stop Safety Relay Module
Ultra-slim 22.6 mm Category 4/PL e/SIL 3 safety relay with dual-channel PNP/NPN input and a solid-state status output.
DQSRN Safety Relay Module
DIN-rail safety relay with DIP-switch selectable E-stop, OSSD, door interlock, two-hand inputs, Cat.4/PLe/SIL3.
Safety Relays in Action — 1 Demonstration Videos
Wiring, setup and live operation filmed on the actual modules. Each clip links back to the series it demonstrates, so you can go straight from footage to specification.
Safety Light Curtain + Guard-Locking Door Switch Interlock — Wiring Demo
Light curtain and safety door lock wired through one safety relay: the door stays locked while the hazard runs, and breaking the curtain drops the same safety circuit. Shows the interlock logic most inspectors ask to see documented.
Related: DA31 emergency-stop safety relay module · Safety door locks & switches
Selection Help & Related
📘 Not sure which series? How to Choose a Safety Door Switch / Interlock