Akubela KXLC-G1E1 KNX Line Coupler / Backbone Coupler

Akubela KXLC-G1E1 KNX Line Coupler

The Akubela KXLC-G1E1 is a DIN rail KNX coupler that links separate segments of a KNX TP (twisted pair) installation. Rather than being a single-purpose device, it uses one piece of hardware that can operate as a line coupler, a backbone coupler, or a line repeater, with the correct role applied automatically once its physical address is set in ETS. This flexibility makes it a practical building block for KNX system integrators who need to keep large or multi-line automation projects organised, efficient, and easy to expand.

Key Features

• Single hardware unit that functions as a line coupler, backbone coupler, or line repeater
• Operating mode is set automatically based on the physical address downloaded via ETS
• Built-in filter table blocks or forwards group telegrams to reduce unnecessary bus traffic
• Filter table is generated automatically by ETS during commissioning, minimising manual setup
• Supports long telegrams of up to 250 bytes for more advanced KNX applications
• Configurable one-button special function, such as temporarily passing all group telegrams for diagnostics
• DIN rail mountable for tidy installation inside switchboards and automation cabinets
• Draws power directly from the connected main KNX TP line, simplifying wiring

Keeping Large KNX Installations Fast and Organised

As a KNX project grows, every additional device adds telegram traffic to the bus, which can slow down response times if left unmanaged. The KXLC-G1E1 sits between a main line and a sub line (or between a backbone and a main line) and only allows relevant group telegrams to cross, using a filter table that ETS builds automatically during commissioning. This keeps each segment's bus traffic to a minimum while still allowing devices on different lines to communicate when required. It's a common addition in multi-floor buildings, larger homes, and commercial automation projects where the KNX network needs to be split into logical, electrically isolated sections without losing overall system-wide control.

What's in the Box

• 1 x Akubela KXLC-G1E1 KNX Coupler
• DIN rail mounting clip (integrated)
• Quick installation reference

Frequently Asked Questions

Can the same unit be used as both a line coupler and a backbone coupler? Yes. The KXLC-G1E1 uses identical hardware for all three coupler roles, and the correct function is applied automatically once the physical address is downloaded through ETS.

Does the coupler need a separate power supply? No. It draws its power from the connected main KNX TP line, so no additional power supply is required for the coupler itself, although each new line segment still needs its own KNX power source.

How does the filter table improve performance? The filter table only allows relevant group telegrams to pass between lines, which reduces bus load and helps larger KNX installations run more efficiently.