Multi Extension Air Setup

Information on how to install and configure your Multi Extension Air.

Loxone Musterkoffer

Technical Data

  • Power supply via 24VDC SELV adapter
  • 12x digital inputs 24VDC, input resistance: 10kΩ
  • 8x digital outputs (relays) 250VAC 16A for each relay, max. 48A total load
  • 4x PWM outputs 12-24VDC, 50W per channel
  • 1-Wire interface
  • Communicates with the Air Base Extension (SMA Female Antenna)
  • Frequency: 868MHz (SRD band Europe), 915 MHz (ISM band region 2) 
  • Convenient pairing with a learn button
  • Compact design for DIN rail mounting
  • Dimensions: 155 x 85 x 49 mm (9 breaker units)
  • Power consumption: < 350 mW
  • Protection: IP20
  • Ambient Temperature: 0 to 50° C
  • Safety shutdown: If the CPU temperature increases over 80°C, all the digital outputs are turned off. Once the temperature drops below 65°C, the respective digital outputs are turned on. The CPU temperature is updated on startup and if there is a temperature change of more than 5°C.

The total switching capacity of the extension must not exceed 11kW, due to thermal reasons. For example if all the relays are closed a maximum current of 5.7A at each relay is allowed. This is because there are 8 relays and at 240V 5.7A multiplied by 8 = ~ 11kW. This means the total switching capacity is over 45A, which is almost half of the inbound fuse of your whole house in the UK.



  • Mount the Multi Air Extension on the DIN rail
  • Connect 24VDC power supply, but do not switch on until the whole installation is completed
  • Connect the inputs and outputs
  • Turn on the power supply
  • After a few seconds, the left LED will flash green if the Multi Air Extension is already configured, orange if not.


Setup in Loxone Config

First power up the Multi Extension Air and then press the learn button on the Multi Extension Air for at least 5 seconds to put the Multi Extension Air in learn mode - see the picture below. Once in the learn mode the status LEDs will flash red-green-yellow.

Funk Schaltaktor - Loxone

In order to learn in the Multi Extension Air you need to activate the Air Monitor. Click on the Air Base extension in the periphery window and then in the context bar at the top check the tick box 'Monitor'.

Next, in the monitor below click on the Learn tab and then click the "Start search" button. Now you will see all the Air devices that are in the learning mode below.

Now click on the correct Multi Extension Air signal. Enter a name for this Multi Extension Air and then click 'Create device'. The extension can now be seen in the periphery tree underneath the Air Base Extension.

In addition to digital inputs and outputs, the Multi Extension also has the PWM outputs for LED lighting, and a 1-Wire interface. 

replace device

If a device has been replaced you need to update the serial number. You can easily do that in the Air Monitor in Loxone Config.

  • mount the new device and activate the power supply or insert the battery
  • search for air devices in learn-mode (as shown in the "getting started" section)
  • highlight the new device and choose the device you would like to replace in the drop-down menu

Finally press "Replace Device" and save your program in the Miniserver. The device has now been replaced.

Additional Information


The Air devices will run their update automatically in the background, and they will function throughout the update. 

If the Air devices are updating when the Miniserver and the Air Base Extension are rebooted then the Air devices will restart the update from the beginning after the reboot. 

The update can take up to an hour so do be aware of this! You can check the version of the devices by looking in Device status. Click on the Miniserver tab and then click the Device status button once.


All Air devices that have a permanent power supply (not battery powered) can also be used as a router. This means that signals from devices with a poor connection to the Air Base Extension are amplified and therefore a greater range can be achieved.

Communication via routers to the Air Base Extension is slower than communication direct from an Air device to the Air Base. If an Air device is more than 2 routers away from the Air Base then we recommend an additional Air Base near the device with the poor signal. This is because the maximum number of hops (number of routers away from the extension). You can see the number of hops for a device in the Air monitor.

For the Air device to operate as a router you must tick the checkbox in the properties of the device. By default this is enabled on permanent power supply devices.

Tip: Clear the monitor

If you have lots of Air devices in the Monitor and wish to clear it before you start monitoring you can empty the results. To do this right click in the Monitor window and click Clear.

Digital inputs

The digital inputs can be used as a frequency counter inputs. You can for example connect pulse meters for electricity, gas or water flow. Please note however that the counted pulses are transmitted once per minute meaning the Multi Extension Air inputs are not suitable for the connection of wind sensors. You need to use an Extension for this purpose.

PWM Outputs

The Multi Extension Air has four PWM outputs that can be used for RGBW lighting, as 4 individual dimmed channels, as well as 4 PWM outputs which have variable frequency. You can set the type of use in the properties of the Multi Extension Air (select the extension in the Periphery Tree). These outputs work in the same way the the RGBW 24V Dimmer Air works. 

The voltage to the PWM outputs is from 12 to 24VDC, please remember that the maximum power must be halved if using 12VDC. The maximum power is 50W per channel, if higher power is required the channels can be bridged. Please note that there is no internal connection between the supply voltage of the extension and the +24V output at the PWM outputs.

RGBW dimming

This is for driving RGBW LED strips. Choosing this type will show two actuators in the periphery tree:

  • Dimmer RGB
  • Dimmer W (White)

Individual dimming channels:

This is for driving single colour LED strips or other loads. Choosing this type will show 4 separate dimming channels in the periphery tree:

  • PWM 1 / Dimmer 1
  • PWM 2 / Dimmer 2
  • PWM 3 / Dimmer 3
  • PWM 4 / Dimmer 4

PWM control signal:

This is not intended for driving loads but to provide a PWM control signal at a configurable frequency. This option will give you 4 individually controllable actuators in the Periphery Tree. The frequency of the PWM in Hz may be specified in the properties of the Multi Extension Air.

  • PWM 1 / Dimmer 1
  • PWM 2 / Dimmer 2
  • PWM 3 / Dimmer 3
  • PWM 4 / Dimmer 4

How the PWM outputs work:

The value of the outputs are controlled using pulse width modulation. This means for example that to get a value of 80% the output will be on for 80% of the period and off for 20% of the period.

The graph below shows the waveforms for an output value of 10%, 50% and 90% respectively:

Powering PWM outputs:

Separate power supply for the extension and LEDs:

We recommend that you use a separate power supply to power your LEDs. You can see how to connect this in the diagram below, please note that the maximum current is 2.1A per channel (50W at 24VDC).

Same power supply for the extension and the LEDs:

For your LEDs, you can use the same power supply as for the extension. However, the power supply must be of the correct rating for the amount of tape and the extension. You can see how to connect this in the diagram below, please note that the maximum current is 2.1A per channel (50W at 24VDC).

12VDC power supply for the extension and LEDs:

You can use a separate 12V power supply instead of 24V if you have lower voltage LEDs. Please note however that the maximum current will now be 1A per channel (25W at 24VDC). You can see how to connect this in the diagram below.

1-Wire Interface

The Multi Extension Air has a full 1-Wire interface. This has the same technical properties as the 1-Wire extension, so a maximum of 20 temperature sensors can be used with the interface, and limitless iButtons.

See here for more information on 1-Wire:

Go to 1-Wire Documentation

Find out more

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