Button interface, 4-way plus. Generates an internal signal voltage for connecting 4 conventional buttons or potential-free contacts and for connecting 4 low-current LEDs. The wires are 30 cm long and can be extended to a maximum of 7.5 m. For installation in a conventional 60 mm switch box. KNX software functions: switching, dimming or controlling blinds via 1 or 2 inputs, position values for blind control (8 bits), pulse edges with 1, 2, 4 or 8-bit telegrams. Differentiation between short and long activation, initialization telegram, cyclical sending, pulse edges with 2-byte telegrams, 8-bit linear controller, scenes. Counter, blocking function, opener/closer, debounce time. Outputs for connecting control lights (low-current LEDs) for status display. For each input/output object type: Contact voltage: 3 V (SELV). Contact current: 0.5 mA. Output current: max. 2 mA.