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KNX Visualisation

KNX visualisation systems enable graphical operation and monitoring of a KNX installation via touch panels, tablets or browsers, they complement push-button operation but do not replace the bus logic.

Visualisation Types

KNX home server (Theben HMS, MDT IP interface with visualisation): device in the distribution board, runs as a web server, browser access without external software. Often integrates logic and scene control.

Open-source systems such as OpenHAB or Home Assistant connect to the bus via KNXnet/IP and offer flexible dashboards, automations and integrations with other smart home protocols (Matter, Zigbee, Z-Wave). Configuration effort is higher than with commercial solutions.

What Visualisation Cannot Replace

Bus logic (switching, dimming, heating control, blind automation) runs within the devices themselves, independently of the visualisation. If the visualisation server fails, the KNX installation continues to work with push buttons. This is a key difference from cloud-dependent smart home systems.

Key Facts

Access via browser, tablet or dedicated panel
OpenHAB / Home Assistant: free, high configuration effort
KNX home server: turnkey, integrated logic
Visualisation failure does NOT disable the KNX installation
Connection to bus via KNXnet/IP tunneling

Related Articles

KNXnet/IP – KNX over IP Networks

KNXnet/IP is the standard for KNX communication over IP networks. It enables remote ETS programming (tunneling) and connects multiple TP lines via an IP backbone (routing).

KNX IP Interface

A KNX IP interface connects an ETS computer to the KNX bus over the LAN. Unlike an IP router, it does not forward telegrams between lines, it is exclusively a gateway for ETS and visualisation systems.

A KNX scene stores the states of multiple devices as a single data point (DPT 17.001). When the scene is recalled, all associated actuators are simultaneously set to their stored values.

KNX Secure – Encryption for the Bus

KNX Secure is the security standard for KNX communication. It protects bus telegrams against eavesdropping and manipulation, both on IP networks (IP Secure) and on the TP cable (Data Security).

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