Safety light curtain, Type 4 host receiver
The Siemens 3SF7844-8BB06-1SS1 is a Type 4 safety light curtain host receiver from the SIMATIC FS420I family, with 14 mm resolution and a 450 mm protected height covering a 0 to 6 m range. The 14 mm detection means it catches fingers reaching into the hazard zone (finger-protection class per IEC 61496-1). PROFIsafe bus connection integrates directly into a safety-rated fieldbus network, keeping the safety CPU separate from the standard automation controller.