The Siemens 3SF7844-8MS50-0ST0 is a Type 4 safety light curtain — a standard transceiver with a 500 mm protective height and a 0 to 6.5 m operating range, integrating muting and a PROFIsafe bus connection for the SIMATIC FS420I safety controller family.
Deployment context
Rated Type 4 per IEC 61496-1, so it is suitable for guarding hazardous zones where a hand or body part reaching into the detection field must stop the machine — the 500 mm protective height and up to 6.5 m range cover typical access points on assembly lines or robotic cells.
Integration notes
The PROFIsafe bus connection ties directly into the SIMATIC FS420I safety controller, so no separate safety relay is needed for the logic interface. Muting function is built in, allowing temporary suspension of the light curtain during material pass-through without a separate external muting module.