The Siemens 3SF5814-2DB20 is a safety interlock switch in an AS-Interface enclosure with standard equipment, designed for machine guarding and emergency-stop applications. It integrates an A/B slave with 4 inputs and 3 outputs over the AS-i bus, a red/yellow mushroom pushbutton actuator, and a pull-to-unlatch mechanism for E-stop reset. The metal housing carries an IP67 rating, so it handles washdown zones and dusty floors without an extra enclosure.
Mounting and footprint
The enclosure measures 65 mm deep, 85 mm wide, and 194 mm tall. Vertical fastening method, 22 mm mounting diameter for the actuator. Four command points on the front — the E-stop mushroom button, an illuminated pushbutton, a dummy plug, and a blank position. The front ring is metal, silver; the enclosure top is grey. Four labels come fitted, black on the actuator.
Safety and compliance
Positive opening is confirmed. Both EMERGENCY OFF and EMERGENCY STOP functions are present with a pull-to-unlatch mechanism.