Input device with four addressable inputs for integrating a conventional light, window, blind, screen button, switch/toggle switch/button, motion detector, timer or other contactor into a bus-controlled lighting and room management system. Depending on the addressing of an input, all actuators in a room or a group of actuators in the room can be operated. Use as: - Switch input: briefly press one of the connected buttons, changes between the two moods 'Absent 0' and 'Present 1' - Switch-dim input: briefly press a connected button, changes between the two moods 'Absent 0' and 'Present 1'. Long press of the button: the lighting is alternately dimmed up or down. - Switching/changeover input: by closing a contactor connected to the 'T1 / T2' inputs, the 'Present 1' mood is called up, or by opening a contactor connected to the 'T3 / T4' inputs, the 'Absent 0' mood is called up. Connect the permanent contactor to the bridged 'ON' and 'OFF' terminals. The device input has two 'ON' and two 'OFF' terminals. - Blind or screen input: by pressing a button connected to the 'T1 / T2' inputs, the curtains/screens in the room can be raised, and by pressing a button connected to the 'T 3s' inputs, the curtains/screens move to their respective end position or working position. The device has two 'T>' and 'T' inputs, the windows in the room can be opened, and by pressing a button connected to the 'T 3s' inputs, the windows move to their end position. The device has two inputs each, 'T>' and 'T<'. The power is supplied via the DALI control line (no mains connection), the current consumption is 4mA (2 DALI loads). The DALI input is voltage-proof against 230/240V external voltage. The bus line can be screwed onto the input of the device. Installation in a flush-mounted box (diameter 53mm, height 15mm), behind a switch or button, flame-retardant polycarbonate, halogen-free, transparent. The contactors are to be designed with a potential-free switching contact, designed for at least 15VDC, which can be connected to the supply lines of the device. Dimensions 41.2 x 28.2 mm, weight: 0.03 kg