What this part is and where it fits
The Siemens 3SF5813-0DH20 is an AS-Interface enclosure for command devices — a 22 mm round plastic enclosure with three control points. Point C and B are illuminated pushbuttons (white, LED 24 V, 1 NO each). Point A is a 40 mm red emergency-stop mushroom pushbutton with two NC contacts. The enclosure connects to the AS-i bus via an M12 connector on top, and the slave is integrated. This is a phased-out product; the official successor is the SIRIUS ACT 3SU1 series.
Compliance note
Substance prohibitance date is 07/01/2006, which aligns with the EU RoHS compliance timeline for the original SIRIUS generation.