Type 4 receiver for the FS450I safety light curtain system
The Siemens 3SF7844-8MB13-0SS1 is a Type 4 standard receiver for the SIMATIC FS450I safety light curtain system, with 14 mm resolution and 900 mm protected height, communicating over PROFIsafe bus connection and supporting muting functions across a 0 to 6 m range.
Type 4 per IEC 61496-1/2 is the highest safety integrity for electro-sensitive protective equipment (ESPE) — it can detect a 14 mm object (finger protection) and is fault-tolerant against single failures. The 900 mm protected height and 0 to 6 m range define the guarding zone dimensions; the PROFIsafe bus connection integrates directly into a SIMATIC safety controller without a separate safety relay.
Deployment context
This receiver is the sensing half of a Type 4 light curtain pair guarding a hazard zone — typically a robot cell, press brake, or automated assembly station where finger detection is required. The PROFIsafe interface means it connects to a SIMATIC F-CPU over the standard PROFIBUS/PROFINET network, carrying safety data alongside standard I/O.