Wiring Guide

A guide to wiring your house for our home automation solution

Get all the information you need

General Information

If you have any questions or doubts during the installation process then please feel free to get in touch with our support team. Our technicians are always happy to help.

Safety Notice
We strongly advice that you seek the advice of a qualified electrician before carrying out any work on your wiring. The Miniserver uses both low voltage and mains, which means that certain works should only be carried out by a qualified individual. Whenever work is done on the cabling of the Miniserver please ensure that power to the Miniserver is removed. Damaged components can occur if this is not observed.

Wiring basics

The wiring in your home can be compared to the nervous system in a human body, without it the automation system can neither sense nor act. Whilst nature has perfected its signalling system over thousands of years, home automation has only been around for a few decades. No one knows where this journey is taking us and there will be lots of new switches, sensors, light-fittings and much more to come.

It is therefore important to think ahead and future proof your installation. The wiring is the backbone of an automation system and whilst it is easy to replace a motion sensor, a switch or a light fitting it is much harder to replace the cables that are plastered into your walls.

We therefore recommend that you use cables that have stood the test of time and have become industry standards. For the sensor side, which is low voltage we recommend you use a data cable, i.e. Cat5e/6/7. A Cat cable can be used for various applications, PC Networks, volt free contacts, serial communication, bus systems, and more. Please note that it cannot be used for 230V loads! For load switching you will have to use appropriately rated power cables, i.e. 1.5mm, 2.5mm, Twin & Earth etc.

The system will be at its most flexible and future proofed if the cables are run as a star from a single point (the star-point) to sensors and actuators. To keep cable runs from getting too long multiple start points can be used, but please consider running a few cables between start points to link them.

Important facts:

  • All our devices are powered using 24V DC, so using 24V sensors is desirable
  • Wire back to a central point
  • If you use multiple start points and have got Extensions around the place, then the maximum allowable length of the Loxone Link is 500m
  • The Link has to be terminated at the last device with a 120 Ohm resistor, if no Extensions are used then no resistor should be used


  • With Loxone you can make any conventional switches become much more useful and multi-functional. As long as the switch provides a contact closure it can be wired into the system and then in software can have as many functions as you want it to. We recommend using retractive switches due to the ability to cycle through clicks, double click etc. 

Connecting the Miniserver to a power supply

  1. Connect the DC output of the 24V power supply to the power terminals on the Miniserver.
  2. Connect the 24V power supply to the mains only once you have finished the rest of the installation.

Whenever work is done on the cabling of the Miniserver please ensure that power to the Miniserver is removed. Damaged components can occur if this is not observed.

Connecting the Miniserver to several power supplies

Wiring example for connecting the Miniserver to several power supplies.

You must connect all the power supply GND's together. Otherwise problems may occur due to difference in potential.

Connecting one or more Extensions to the Miniserver

  1. Connect the power terminals of the Miniserver to the power terminals on the Extensions.
  2. Connect the Loxone Link connector of the Miniserver with the Loxone Link connector of the Extension.
  3. Terminate the Loxone Link at the last Extension with a 120 Ohm resistor (comes with your Miniserver package).
    Note: If no Extension is connected there is no need to use a 120 Ohm resistor.

The power should be removed whenever working on the installation, but that if this is not possible then ensure that the blue Link connector is always unplugged before the power connector to prevent damage to the communication circuitry.

Connecting switches and actuators

Shows how to wire in a switch and a light bulb as an example.

Connecting switches and actuators

You can connect any switch you choose as well as PLC push buttons to the Miniserver.
More on this here

Connecting blinds or curtains

An example for connecting a blind motor, Open is Up, Close is Down.

Connecting blinds or curtains

Connecting lights to a Dimmer extension 

Wiring example for a single dimmed light circuit.

Connecting dimmers

Connecting several PWM Dimmers

Shows how to connect several PWM Dimmers to the DMX extension.

Connecting multiple PWM Dimmers

Connecting temperature sensors

Temperature sensors are connected to the analogue inputs of the Miniserver or the Extension. +24 V and GND can, if necessary, be looped from one temperature sensor to the next but each sensor requires its own link back to an analogue input.

  • 1: + 24V
  • B/2: GND
  • C/3: 0 - 10V

Connecting proportional (0 - 10V) actuators

A proportional actuator for valves or heating manifolds needs to be connected to the 24V power supply and is then controlled by a 0 - 10V input signal to set the position.

Connecting proportional actuators

Connecting digital (I/O) actuators (thermal example)

Digital 230V thermal actuators for UFH manifolds are controlled by a digital output of the Miniserver or the Extension.

Connecting digital actuators

Circuit protection of 24V power supply

The 24V power supply of the Miniserver should be protected by a suitable MCB, we recommend to use an MCB of a rating of no greater than 3A. If the MCB and the power supply are not within the same consumer unit then 17th edition regulations should be taken into account to decide whether RCD protection is required. 

Circuit protection of outputs

In compliance with 17th edition wiring regulations all circuits must be protected by an RCD and appropriately rated MCB. The rating of the MCB is dependent on the overall load and guage of the cable used. 

Outbound circuit protection with microfuses

In addition to the RCD and MCB protection of the mains circuits that are switched via the Miniserver (or Extensions), the switching gear inside the Miniserver can be protected as well by the use of microfuses on the outbound wiring side of the relays.

Connecting a 24V motion sensor

Here is an example of how to wire up a 24V motion sensor (this example is for the one we sell in our webshop). The PIR is wired directly to a digital input on the Miniserver, Extension or Dimmer Extension. In addition the PIR also provides a brightness value (5-2000 lux) via a 0-10V output signal. This can be connected to an analogue input. 

Refer to the following diagrams to see how to set the DIP switches and how to wire the PIR. 

Connecting a 230V motion sensor

The contact of the PIR switches 230V which is too high for the digital inputs. To use such a sensor with the digital inputs you need to wire this contact to a coupling relay (input A1). Input A2 of the coupling relay is connected to neutral.

The relay contact 11 is then connected to 24V and the contact 14 is connected to the digital input of the Miniserver, Extension or Dimmer Extension. 

When the motion sensor is triggered the coupling relay 24V is switched on and the Miniserver then detects this change in voltage. See the diagram below for wiring connections.

Connecting coupling relays for higher load switching

To switch higher loads (for example a 3kWh immersion heater) you need to use a coupling relay or a contactor. Connect a relay of the Miniserver or Extension to the A1 input of the coupling relay. Input A2 of the coupling relay is connected to neutral. Using the relay contacts 11 and 14 the 230V signal can be switched. See the diagram below for connections.