The Siemens 3SF5814-0A. is an AS-Interface enclosure for command devices — a plastic, round 22 mm housing with 4 control points, designed to mount into a panel or machine frame and connect to an AS-i network. The enclosure fastens vertically or horizontally, giving layout flexibility on a control station or pendant.
This enclosure is not rated as an emergency stop device and does not provide positive opening operation. That means it is suited for standard command and indication functions — start/stop, selector switches, pilot lights — but not for safety-related stop circuits where a positively driven NC contact is required by IEC 60947-5-1. If your BOM calls for an emergency stop or safety gate function, this part will not meet the machinery directive requirements; you need a separate safety-rated actuator and contact block.