22154508 LM-4UAD General-purpose input unit with four independently addressable inputs for integration of momentary-action electronic switches or momentary-action EIB/KNX switches, including status feedback via LED into a bus-based lighting and room management system. Depending on the addressing of the input, all actuators or a group of actuators in the room can be controlled. By briefly pressing the momentary-action switch connected, it is possible to switch between two scenarios ("Absent" and "Present" scenes); by a long press, the room lighting or a group of lighting actuators in the room can be alternatingly dimmed up and down. Unit supplied via LM bus or external 24V power pack,10-pole flat cable with connector for momentary-action switch designed for at least 15V DC, installed in flush box behind momentary-action switch, dimensions Ø 53mm, height 15mm, material: non-flammable polycarbonate, halogen-free, transparent.