Relay Extension

The Relay Extension features 14 dry contact relay outputs.

Datasheet Relay Extension

Table of Contents


The Relay Extension is installed on a DIN rail in a suitable enclosure.

Connect the power supply and Link communication to the Miniserver.

Connect the loads to the relay terminals. For loads exceeding 12A, use a wire cross-section of 2.5mm².

For thermal reasons the total load rating must not exceed 48A (IEC) or 45A (UL).

The Extension starts after switching on the power supply, and the status LED will flash orange after a short time when the connection to the Miniserver is established.

Then follow the pairing procedure

Wiring examples

Connecting switches and loads


Summary Unit
Actuator (Relay) 1 Digital
Actuator (Relay) 2 Digital
Actuator (Relay) 3 Digital
Actuator (Relay) 4 Digital
Actuator (Relay) 5 Digital
Actuator (Relay) 6 Digital
Actuator (Relay) 7 Digital
Actuator (Relay) 8 Digital
Actuator (Relay) 9 Digital
Actuator (Relay) 10 Digital
Actuator (Relay) 11 Digital
Actuator (Relay) 12 Digital
Actuator (Relay) 13 Digital
Actuator (Relay) 14 Digital

Diagnostic Inputs

Summary Description Unit Value Range
Online Status Relay Extension Digital -
System temperature °
Temperature Shutdown If the CPU temperature reaches a critical point, the outputs of the device are switched off. This can be due to short-circuits, overloaded switching loads or too high an ambient temperature. Digital -


Summary Description Default Value
Serial number Specifies the serial number of the device.
For Extensions: 'Auto' may only be used if only one Extension of this type is being used.
Monitor online status When selected, you will be notified via System Status or the Cloud Mailer if the device is no longer available or goes offline. -

Safety Instructions

The installation must be carried out by a qualified technician in accordance with all applicable regulations.

The installation requires a suitable enclosure to ensure protection against contact, water and dust.

The device must not be used as part of safety-critical systems.


Datasheet Relay Extension

Datasheet Relay