Safety light curtain for guarded access
The Siemens 3SF7844-8BB08-1SS1 is a Type 4 host receiver light curtain from the SIMATIC FS420I family, with 14 mm resolution and a 600 mm protective height. The 14 mm detection capability means it catches fingers reaching into the hazard zone — finger-protection class per IEC 61496-1 — making it suitable for point-of-operation guarding where small gaps matter. Range covers 0 to 6 m, and the PROFIsafe bus connection integrates directly into a safety-rated PROFINET network without a separate interface module.
Deployment context
The host receiver mounts in the standard SIMATIC FS420I column profile, aligned with the matching emitter. PROFIsafe connection runs over a standard M12 bus cable back to a failsafe CPU (e.g., S7-1200F or S7-1500F). The 14 mm resolution and Type 4 SIL 3 / PL e rating suit it for guarding robot cells, assembly stations, and packaging lines where operator access to the hazard zone must be detected at finger level.