What this AS-Interface emergency stop station delivers
The Siemens 3SF5816-2DA00 is an AS-Interface emergency stop station in a metal enclosure with IP67 protection, meaning it withstands washdown environments and outdoor exposure on conveyor lines, packaging machines, or material-handling cells. It carries both EMERGENCY OFF and EMERGENCY STOP functions, with a rotate-to-unlatch mechanism that requires a deliberate twist to reset after activation — no accidental re-energisation. Six command points are arranged on the rectangular front: illuminated pushbuttons, a knob, a standard pushbutton, an emergency-stop mushroom pushbutton, and a dummy plug. The front ring is silver metal; the enclosure top is grey. Eight switching elements handle the safety circuit logic, and the unit is pre-wired on a strip terminal for quick panel connection. Rated supply is 26.5... 31.5 V DC, which matches the standard AS-Interface bus voltage range. The integrated LED light source runs on AC/DC and is socketed for replacement. Vibration resistance per IEC 60068-2-6 covers 20... 200 Hz at 5g.
The enclosure mounts vertically and uses a 22 mm mounting diameter for the actuator elements. Dimensions are 85 mm wide, 65 mm deep, and 280 mm tall — sized for a standard AS-Interface drop station on a machine frame or enclosure door. Floor mounting is the intended installation method.