Dimmer switch control unit for electronic ballast 1-10V, 1 normally open contact not potential-free 600VA and 1-10V control output 40mA. Bidirectional. Standby loss only 0.5 watts. Minimum brightness and dimming speed adjustable. With light scene control and constant light control. Modular device for mounting on DIN-EN 60715 TH35 mounting rail. 1 division unit = 18mm wide, 58mm deep. State-of-the-art hybrid technology combines the advantages of wear-free electronic control with the high performance of special relays. Zero-crossing switching to protect contacts. The power requirement of the 12V DC supply is only 0.1W. Also for controlling LED converters with passive 1-10V interface without auxiliary voltage up to 0.6mA. Above that with auxiliary voltage. 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. Connection to the Eltako RS485 bus. Cross-wiring of bus and power supply with jumper. The minimum brightness (fully dimmed) can be set using the %lamp rotary switch. The dimming speed can be set using the dim-speed rotary switch. The load is switched on and off using a bistable relay at the EVG output. Switching capacity of fluorescent lamps or low-voltage halogen lamps with EVG 600VA. By using a bistable relay, there is no coil power loss and no heating as a result, even when switched on. After installation, wait for the automatic short synchronization before connecting the switched consumer to the mains. The buttons can be taught in either as direction buttons or as universal buttons: The direction button is then switched on and dimmed up at the top and switched off and dimmed down at the bottom. A double click at the top triggers automatic dimming to full brightness at dim-speed. A double click at the bottom triggers the snooze function. The children's room function is carried out with the upper button. As a universal button, the direction is reversed by briefly releasing the button. With children's room function and snooze function. Light alarm function: A correspondingly programmed radio signal from a timer starts the wake-up function by switching on the lighting at the lowest brightness and slowly dimming up to the maximum brightness. A short press (e.g. of a radio hand-held transmitter) stops the dimming. Children's room function: When switching on with a longer button press (universal button or direction button at the top), the light is switched on at the lowest brightness after approx. 1 second and, as long as the button is continued, it is slowly dimmed up without changing the last saved brightness level. Snooze function: (universal button or direction button at the bottom):A double pulse dims the lighting from the current dimming position to the minimum brightness and then switches it off. The dimming time of 30 minutes depends on the current dimming position and the set minimum brightness and can be shortened accordingly. The lighting can be switched off at any time during the dimming process by briefly pressing the button. The LED under the upper rotary switch accompanies the programming process in accordance with the operating instructions and indicates control commands during operation by flashing briefly.