The KNX CD-4C dimmer actuators are used to switch and dim fluorescent lamps with 1-10V electronic ballasts. The voltage is applied to the electronic ballast via the device's relays., The lights are controlled via the 1-10V voltage. The 1-10V voltage is supplied by the electronic ballasts., The device is equipped with short-circuit and temperature protection as well as a lamp-protecting soft start., The device is intended for permanent installation on a top-hat rail in high-voltage distribution systems. Installation must take place in dry indoor rooms
