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Das intelligente Busprinzip

In conventional electrical installations, the control functions are mostly carried over the load cables. This means each function needs its own control cable. The intelligent solution is achieved by the installation bus which carries all the control signals in a building, thus making subsequent changes easy to implement.

One bus for maximum flexibility

As part of a conventional electrical installation, it is necessary to specify how and where household systems are to be controlled prior to the building work. A KNX installation is flexible, because all functions can be changed and expanded at any time. The two-wire installation bus 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. This is based on fast transmission rates with the highest levels of immunity to interference.

The conventional solution: Many separate lines, meaning less flexibility
The intelligent KNX solution: The bus carries out all control functions for maximum flexibility

Die Systemkomponenten

All the devices for a KNX installation are connected together by a bus, 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.


System devices and components

They are needed for the fundamental functioning of the system. They consist of power supply

units for generating bus voltage, couplers for connecting bus segments and interfaces for

connecting programming devices.



These 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.



They receive data which are then converted into actions. This can include controlling blinds,

dimming lights or controlling heating and air conditioning systems.

System devices (selection)

  • USB interface REG-K
    USB interface REG-K
  • Line coupler
    Line coupler
  • IP Router
    IP Router
  • KNX logic module
    KNX logic module
  • Power supply unit
    Power supply unit


  • KNX push-button
    KNX push-button
  • Movement detector
    Movement detector
  • Room temperature control unit
    Room temperature control unit-
  • Binary input
    Binary input
  • Anernometer

Actuators (selection)

  • Switch actuator
    Switch actuator
  • Dimming actuator
    Dimming actuator
  • Heating actuator
    Heating actuator
  • Blind actuator
    Blind actuator
  • KNX Dali-Gateway
    KNX Dali-Gateway

Efficiency at the push of a button

Example: In the conference room

A conference room is ideal for demonstrating how comfortable and efficient a KNX presentation scene is. All connected loads can be activated simultaneously at the push of a button: Lighting groups are switched off or dimmed, blinds and screens are lowered and the heating/air conditioning provides the perfect room climate.


The special strength of KNX lies in its scene function, into which any number of loads can be

Integrated. If you actuate the push-button, it sends a data telegram to all the actuators. The actuators evaluate this telegram and cause the individual loads to perform a predefined activity – e.g. dimming the light to 50%, lowering the blinds or the screen and switching on the air conditioning. When leaving the conference room, the scene “Absent” takes care of switching off the light, reducing the temperature to the predefined “standby value” or the repositioning of the of the shutters. If a KNX presence detector is integrated this can also be done automatically. If a scene has been activated but not deactivated upon departure, the presence detector will recognise that no one is left in the room and will switch off all loads automatically.