Binary input, 4-channel, flush-mounted. Conventional pushbuttons or auxiliary contacts can be connected to 4 channels. The contact query information can be used to control Busch-free home actuators or to acquire status information. The contact query voltage is provided by the binary input itself. Connection cables can be extended by a maximum of 10 m. Flush-mounted device for installation in a 60 mm device or junction box. The bus connection is made via the included bus terminal. Programming is only possible with bus voltage applied via the web interface of the System Access Point. Technical data: Bus system: KNX - no; Other bus systems: other; Mounting type: flush-mounted; Number of input channels: 4; Number of inputs: 4; Number of output channels: 4; Protection class (IP): IP20; Sales unit: 1.