Universal dimmer switch, Power MOSFET up to 1200W. Automatic lamp detection. Minimum brightness and dimming speed adjustable. With children's room, snooze and light alarm switch as well as constant light control and master-slave operation. Also with light scene control via PC or with radio buttons. Encrypted radio, bidirectional radio and repeater function can be switched on. Standby loss only 0.7 watts. Installation in the 230V mains connection cable, for example in false ceilings and lights. 252mm long, 46mm wide and 31mm high. With cable strain relief. Universal dimmer switch for lamps up to 1200W, depending on the ventilation conditions. Dimmable 230V LED lamps and dimmable energy-saving lamps ESL also dependent on the lamp electronics and the dimming type. Switching in zero crossing with soft on and soft off to protect the lamp. The set brightness level is saved when switched off (memory). In the event of a power failure, the switching position and brightness level are saved and, if necessary, switched on when the supply voltage returns. Automatic electronic overload protection and overtemperature shutdown. The upper rotary switch determines during operation whether automatic lamp detection should be activated or special comfort positions: AUTO allows dimming of all types of lamps. LC1 is a comfort position for dimmable 230V LED lamps which, due to their design, cannot be dimmed far enough to AUTO (trailing edge phase control) and therefore have to be forced to leading edge phase control. LC2 and LC3 are comfort positions for dimmable 230V LED lamps like LC1, but with different dimming curves. EC1 is a comfort position for energy-saving lamps which, due to their design, have to be switched on with a higher voltage so that they can safely switch on again when dimmed down even when cold. EC2 is a comfort position for energy-saving lamps which, due to their design, cannot be switched on again when dimmed down. Memory is therefore switched off in this position. Inductive (wound) transformers must not be used in the LC1, LC2, LC3, EC1 and EC2 positions. In addition, the maximum number of dimmable LED lamps can be lower than in the AUTO position due to the design. LC4, LC5 and LC6 are comfort positions for LED lamps like AUTO, but with different dimming curves. PCT is a position for special functions that were set up with the PCT14 PC tool. The PCT14 connection is made using the DAT71 data transmitter. The minimum brightness (fully dimmed) can be set using the middle % lamp rotary switch. The dimming speed can be set using the lower dim speed rotary switch. The buttons can be programmed either as direction buttons or as universal buttons: As a direction button, one side can be switched on and dimmed up, and the other side can be switched off and dimmed down.A double click on the switch-on side triggers automatic dimming to full brightness at dim-speed. A double click on the switch-off side triggers the snooze function. The children's room switch is carried out on the switch-on side. As a universal button, the direction is reversed by briefly releasing the button. Light scene control, constant light control, master-slave operation, light alarm switch, children's room switch and snooze function according to the operating instructions. With a button taught in as a stair light button, a stair light timer function with RV = 2 minutes can be called up. With individual light scene buttons, set brightness levels can be called up during teaching. With a taught-in FHD60, a twilight switch can be implemented. With up to 4 FBH, the light can be switched on depending on movement and brightness. The LED accompanies the teaching process according to the operating instructions and indicates control commands during operation by flashing briefly.