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KNX is a standardised OSI-based network communications protocol for building automation. KNX is the successor to, and convergence of, three previous standards: the European Home Systems Protocol (EHS), BatiBUS, and the European Installation Bus (EIB or Instabus). KNX is the world’s only open standard for home and building control and is compliant to:

  • EN 50090
  • EN 13321-1
  • ISO/IEC 14543

 The KNX standard is administered by the KNX Association.

KNX system components

All the devices for a KNX installation are connected together by a two wire bus (the most common form of installation), thus allowing them to exchange data. The function of the individual bus devices is determined by their project planning, which can be changed and adapted at any time.

  • Sensors (e.g. push buttons, wind-, temperature-, movement-sensors)
  • Actuators (dimming units, electrical heating valves, displays)
  • System devices and components (e.g. Line-Couplers, Backbone-Couplers)

Sensors are the starting point for every action, because they gather information and send it on the bus as a data telegram. This can be information about room temperatures, movements, wind measurements or manually input instructions (Push buttons). Sensors are selected depending on the required application.

Actuators receive data telegrams which are then converted into actions. This can include controlling blinds, dimming lights or controlling heating and air conditioning systems. Actuators are also selected depending on the required application and consist of a bus coupler and an application module with the corresponding application program.

The application program is loaded into the devices together with the project design and commissioning software via a system component called interface (either serial or USB interface) connected to the PC and the bus. The two-wire installation bus is routed in parallel to the 230 V electrical power supply connects all devices and systems of the household technology together, and transmits all the control signals. It looks the same as the DALI protocol bus.

Why Chose KNX

Unlike proprietary protocols which only the manufacturer supports KNX is an open worldwide standard with over 260 manufacturers producing products that all interoperate together for a seemless solution. KNX is the perfect choice for a complete integrated project and provides not just lighting control but a total solution for your building control system.

  • An International Standard  – therefore future proofing your decision and investment.
  • Product Certification guarantees interoperability & interworking of products.
  • KNX Association requires a high level of production and quality control during all stages of the product life
  • A unique manufacturer independent Engineeering Tool (ETS).
  • KNX can be used for all applications in home and building control.
  • One protocol no matter what the solution or building type.
  • Support of different communcation media that interoperate to suit the project
    • TP – Twisted pair
    • PL  – Powerline
    • RF – Radio Frequency
    • IP – Ethernet
  • KNX can be coupled to other systems old or new where required.
  • KNX is independant from any hardware or software technology.
  • Chose the best product that suits your project provides design flexability.
  • Real ongoing product development by over 265 companies
  • For more information visit the KNX Association