eTR 103 AC KNX sec room temperature controller for air conditioning units, wall-mounted in a modern office settingeTR 103 AC KNX sec room temperature controller for air conditioning units, wall-mounted in a modern office setting

eTR 103 AC KNX sec: Launch of the new eTR Secure generation

News vom 09. April 2026

eTR Secure: KNX room controllers that simply work

Many KNX room controllers offer a wide range of functions – which often makes them unnecessarily complex to use.

With eTR Secure, Elsner Elektronik takes a different approach. The new generation of KNX room controllers focuses on simple installation and commissioning, future-ready technology and functions that are consistently aligned with the actual requirements in the room.

The eTR Secure generation begins with eTR 103 AC KNX sec. This room temperature controller for VRF air conditioning systems takes on key tasks in room climate control, for example in office or hotel applications. It demonstrates how a reduced user interface and a powerful application can be effectively combined.

KNX Data Secure is integrated as standard and ensures secure, end-to-end communication. Smart Linking and semantic tagging also support efficient and simplified commissioning.

Find out more about eTR 103 AC KNX sec!

Discover eTR 103 AC KNX sec
Overview

Benefits of eTR 103 AC KNX sec

  • Climate control functions can be operated directly in the room, without additional push-buttons or interfaces
  • Fewer additional devices required, as control, sensors and logic are integrated in the unit
  • Easy integration of window contacts or push-buttons without additional components
  • Reliable room control thanks to integrated PI controllers
eTR 103 AC KNX sec cut-outeTR 103 AC KNX sec cut-out
eTR 103 AC KNX sec

Technical highlights

  • Control of VRF air conditioning systems (fan speed, mode, setpoint temperature)
  • Integrated temperature and humidity sensors
  • Combination of internal and external measurements possible
  • 2 inputs for push-buttons, window contacts or sensors
  • Logic functions can be implemented directly in the device
eTR 103 AC KNX sec mounted on the wall in front of a modern, cosy bedroomeTR 103 AC KNX sec mounted on the wall in front of a modern, cosy bedroom
eTR Secure

The new series at a glance

What's behind eTR Secure? Discover how the new device generation is structured, which functions are in focus and how this changes planning and implementation.

eTR 103 AC KNX sec mounted on the wall in a modern office settingeTR 103 AC KNX sec mounted on the wall in a modern office setting
Further technical articles

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