Dimmer Extension


Technical Data
Dimmer usage


power supply 18 … 28VDC SELV
input Power for extension: 24VDC
Power for circuit: 240VAC
inputs 8 digital inputs 24VDC
outputs 4 dimmable outputs (phase control / phase section)
Channel 1: 400W @ 240VAC
Channel 2 – Channel 4: 210W @ 240VAC each
protection class IP20
ambient temperature -10 … 50 ° C (ventilation slots must remain free)
humidity 95% RH (non-condensing)
Dimensions 157 x 88 x 57mm
Maintenance and cleaning No maintenance necessary. Clean with a dry cloth.
 When calculating the number of lights that can be powered on one dimmer you MUST account for inrush current, information on inrush for the lights being used will be available from the light manufacturer.

Dimmer Extension Loxone


Dimmer Extension Loxone Dimensions


230V LED dimming of lights/strips 24V LED dimming of lights/strips
With the Loxone Dimmer, you can dim common 230V LED lights and strips. LED lights and strips that run on 24V DC can be dimmed with the Loxone RGBW Tree/Air Dimmer.
 When calculating the number of lights that can be powered on one dimmer you MUST account for inrush current, information on inrush for the lights being used will be available from the light manufacturer.


  • Mount the Dimmer Extension on the DIN rail
  • Connect 24V DC power supply, but do not switch on until the whole installation is completed
    (We recommend looping through the Miniserver)
  • Connect the inputs and outputs
    (We recommend splitting the channels of the dimmer across 3 phases)
  • Connect the Loxone Link
  • Note: If it’s the last extension, terminate the Loxone Link with a 120Ω resistor (included with the Miniserver)
  • Turn on the power supply
  • After a few seconds, the left LED will flash green if the extension is already configured, or orange if not


  • Inductive loads (e.g. conventional transformers) and capacitive loads (e.g. electronic transformers) must not be interconnected!
  • Conventional transformers must be loaded with at least 80% of the nominal load with lamps.
  • The Dimmer Extension is not suitable for speed control of motors, since back EMF with voltage spikes of over 300 V causes permanent damage. If you have any questions regarding this please contact Support.
  • When using the Dimmer for mains LEDs each channel should be de-rated by 50% due to the high inrush currents. This means that the first channel would be rated at 200 Watts and the other channels at 105 Watts.

Icon Exclamation Mark LoxoneMake sure that your bulbs are labelled as dimmable – especially with energy saving bulbs and LEDs.



The Loxone Dimmer Extension is an RLC Dimmer. That means you can dim resistive, inductive and capacitive loads.

When the left status LED on the Dimmer extension is red, the measurement of the frequency of the dimming channels is being performed.


You can change what type of load is being dimmed.

Dimming type Type of load Example
Leading-edge dimming Resistive or inductive load Conventional low voltage halogen transformers
Trailing-edge dimming Resistive or capacitive loads Incandescents, electronic high voltage halogen transformers
Mains LEDs (leading edge) Mains LEDs (leading edge) Resistive Mains 240V LEDs
Mains LEDs (trailing edge) Resistive Mains 240V LEDs

Loxone Dimmer Properties


If an incoming value is outside the range (0 to 10) for instance 0-100% with 0-10VDC, this can be adjusted for using the corrector.

Dimmer Correction Graph

Correction example for a dimmer

The analogue output from the dimmer function block gives out a 0-10V signal, the output of the Dimmer Extension is 0-100%, so the corrector must be used for the scaling to be correct. The scaling is linear. If 1V at the analogue output corresponds to 10%, then the following settings must be used:

Input voltage 1 0V
Display value 1 0%
Input voltage 2 10V
Display value 2 100%

Since high voltage LEDs have their own electronics, it might be that at 70%, they are already at their full brightness. The corrector can also be used here:

Input voltage 1 0
Display value 1 0%
Input voltage 2 100%
Display value 2 70%


In the section ‘Display’, you can choose the desired units. It can be useful to read the help window, as shown in the screenshot.

If you want a status display of the output, then tick the box next to ‘Show status only’.

Dimmer Display Values


The following documents can be downloaded: