What this part is and where it fits
The Siemens 3SF5813-4DF05 is an AS-Interface enclosure with three command points, designed for direct integration into an AS-i bus network. It carries a rated voltage of 26.5... 31.5 V DC, which is the standard AS-Interface power range, so it connects straight to the yellow flat cable without an additional power supply. The housing is IP65-rated, meaning the unit withstands washdown and dust ingress — suitable for food-and-bev or wet-area deployment on a conveyor line.
Integration notes for the panel
The enclosure measures 64 mm deep by 85 mm wide by 154 mm tall — a compact footprint that mounts vertically on a flat panel surface via the round 22 mm installation opening. It is pre-wired on strip terminals, which simplifies field wiring and reduces termination time. The actuating element is a dummy plug / pushbutton combination with a black front ring; material is plastic throughout.