Type 4 light grid transmitter for access guarding
The Siemens 3SF7844-6SS50-0SS0 is a Type 4 safety light grid transmitter from the SIMATIC FS420I family, designed for finger and hand protection in hazardous zones. With a 500 mm protective height and a detection range of 0 to 18 m, it covers wide access openings on automated lines — press cells, robotic workcells, conveyor infeed stations. Type 4 per IEC 61496 means it tolerates a single fault without losing the safety function, so it suits SIL 3 / PL e applications.