Schneider Electric KNX. For connecting 4 conventional buttons or potential-free contacts to KNX. Internally generates a signal voltage SELV that is galvanically isolated from the bus. With integrated bus coupler and plug-in screw terminals. The input voltage level is displayed for each input with a yellow LED. A green LED indicates that the device is ready for operation after the application has been loaded. For mounting on TH35 top hat rails in accordance with EN 60715. The bus is connected via a bus connection terminal. Inputs: 4. Contact voltage: max. 10 V, clocked, contact current: max. approx. 2 mA, pulsed, cable length: max. 50 m, device width: 2.5 HP corresponds to approx. 45 mm, scope of delivery: with bus connection terminal and cable cover.