What it is and where it fits
The Siemens 3SF7844-8TB11-1SS1 is a Type 4 safety light curtain host receiver with 14 mm resolution and 750 mm protective height. It covers a 0 to 6 m range and connects via PROFIsafe bus. The 14 mm resolution detects 14 mm diameter objects entering the field. The 750 mm protective height covers vertical access areas.
Lifecycle and sourcing reality
The current lifecycle stage allows specifying this into a new design or replacement order. Availability and pricing are confirmed at quote time.
Integration notes
The PROFIsafe bus connection on this host receiver reduces the safety circuit to a single cable back to the failsafe controller — no hardwired OSSD outputs, no external safety relay. That cuts commissioning time on a multi-zone line: the PLC handles the mute, blanking, and restart interlock logic in software. Just align the emitter and receiver, set the PROFIsafe address, and run the safety validation routine.