4-channel DALI LED dimmer for ceiling installation. Standby loss of only 0.12 watts. Suitable for driving constant voltage LED modules (CV) with operating voltages from 12V to 48V. Operating mode DT6: separate control of the channels via 4 DALI addresses. Operating mode Colour&Dim: control via 2 DALI addresses, one for adjusting brightness and one for adjusting color. SwitchDim2: operation via 2 button inputs allows control of brightness and color without DALI. Dimming range 0.1%-100%. Switchable PWM frequency (122Hz/244Hz/488Hz/976Hz). Supply voltage from 12V to 48V DC (corresponding to the operating voltage of the LED modules). Connection current 16A. The maximum connection current can be distributed across the channels as needed. High efficiency. Configuration via PC software DALI-Cockpit and DALI-USB interface. Operating modes: The device has several operating modes: DT6 (default state): In this mode, each channel is controlled via a separate DALI address (Device Type 6). Operation can alternatively be done via two button inputs (SwitchDim2): SwD1: Brightness. Short press: On/Off. Long press: Dimming. SwD2: Scene switch (short press). Colour&Dim: This mode is used for controlling RGB lights. Control is done via 2 DALI addresses, with one address influencing brightness and the other channel distribution (e.g., color). The Colour&Dim mode allows for color adjustment without affecting brightness and vice versa. Adjustments are made using DALI standard commands such as Dim Up/Down and can thus be integrated with all common controls and gateways (e.g., KNX). This control option offers an alternative to the DT8-RGBWAF mode. Operable via DALI or SwitchDim2: DALI address 1, SwD1: Brightness. DALI address 2, SwD2: Color.