﻿Older universal power extensions which are not designed for operation with LEDs supply themselves with power directly via components of the output signal of the dimming actuator (no neutral conductor connection available). To ensure failure-free operation, the dimmer actuator output signal must be adapted in such a way that a certain amount of residual phase angle still remains (residual cut-on or off) for the highest dimming position. This residual phase angle must be large enough to enable universal power boosters to supply themselves with energy.
This adjustment is not necessary when connecting current LED universal power extensions.

*Parameter disabled*: There is no old type universal power extension connected to the dimmer output. In the highest dimming position (100 % brightness value), the smallest possible residual phase angle is set on the dimmer output. As a result, the connected lighting is set to the maximum lighting level technically possible.

*Parameter activated*: At least one old universal power extension is connected to the dimming output. In the highest dimming position (100 % brightness value), a residual phase angle necessary for universal power boosters is set on the dimmer output. The output signal cut-on or cut-off in this way corresponds to a resulting brightness of approx. 90 % compared to an identically constructed dimming actuator without a power booster. The dimming actuator rescales the adjustable brightness range automatically for the corresponding channel so that a presetting and feedback within a range of 0...100% is still possible.
