LED dimmer with 4 channels for LED control with constant voltage regulation via PWM (1000 Hz). The dimming channels can be configured as independent channels, RGBW channel, RGB+W channels and combinable TW channels. In addition, it has a relay output (16 A) for controlling the LED power supply or for independent use and housing buttons for checking the function of the channels. Among the extensive functions, color temperature control and HCL (Human Centric Lighting) control stand out. It supports KNX Secure. Maximum current per channel: 8 A. Maximum current per device: 20 A. Power supply: 12-40 VDC.