Flush-mounted DCS switching actuator Features: Flush-mounted switching actuator for controlling an external gong or other device via the Gira door communication bus. Control of a zero-voltage switching contact (24 V SELV 50 A to 1.6 A AC DC) via the 2-wire bus. The flush-mounted switching actuator can be controlled via: the buttons "Door" and "Light" on the home station, the floor-call button of the home station, the call button on the door station, the call button on the home station, a zero-voltage button (in conjunction with the 2-gang door communication button interface). The flush-mounted switching actuator can be used in four different operating modes: switching, timer sec., timer min., and pulse. Impulse function for controlling existing automatic staircase mechanisms. Switching time can be adjusted continuously from 1 to 10 s or 1 to 10 min., depending on the function set. LED display for programming, function selection, and time setting. Notes : The flush-mounted switching actuator is intended for installation in a deep device box (60 mm deep) behind a door communication bus coupler.