Dimming switch control unit for electronic ballast 1-10V, 1 potential-free relay 600VA and 1-10V control output 40mA. Bidirectional. Standby loss only 0.9 watts. Minimum brightness and dimming speed adjustable. Features light scene control and constant light regulation. Rail-mounted device for installation on a mounting rail. State-of-the-art hybrid technology combines the advantages of wear-free electronic control with the high performance of special relays. Switching at zero crossing to protect the contacts. The power requirement for the 12V DC supply is only 0.1W. Also suitable for controlling LED converters with a passive 1-10V interface without auxiliary voltage up to 0.6mA. Beyond that, with auxiliary voltage. The set brightness level is stored when switched off (memory). In the event of a power failure, the switching state and brightness level are saved and can be switched on again when the supply voltage returns. Connection to the Eltako RS485 bus. Cross-wiring of bus and power supply with a jumper. The lamp rotary switch can be used to set the minimum brightness (fully dimmed). The dim-speed rotary switch allows for adjustment of the dimming speed. The switching on and off of the load is done with a bistable relay at the EVG output. Switching capacity for fluorescent lamps or low-voltage halogen lamps with electronic ballast 600VA. By using a bistable relay, there is no coil loss and no heating even when switched on. After installation, wait for the automatic short synchronization before connecting the switched load to the mains. The buttons can be programmed either as directional buttons or as universal buttons: as directional buttons, the top button turns on and dims up, while the bottom button turns off and dims down. A double-click on the top triggers automatic dimming up to full brightness at dim-speed speed. A double-click on the bottom activates the snooze function.