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The 30-year celebration of KNX building management system


The longest and biggest KNX event in its 30-year history!


The year 1990 ushered in the beginning of something that would shape a whole industry and subsequently the whole world - the birth of 'KNX'. Now, 30 years later, KNX has not only made major technological advancements for smart homes and smart buildings, it has evolved into a movement, which has reached all corners of the world.


What is KNX

A worldwide communication standard for home and building control. It was created in 1999 by Konnex Association (now KNX Association), and is a combination of three previous standards: European Home Systems Protocol (EHS), BatiBUS, and European Installation Bus (EIB or Instabus).

The KNX Association has 500 member companies in 42 countries, offering more than 5,000 certified products for building automation, which are handled by approximately 66,562 certified KNX-partners in 156 countries.


KNX is used in residential and commercial building automation for HVAC, lighting, security, remote access, blind and shutter control, visualization, and energy management.


ü   Millions of installed devices

ü   Developed specifically for building automation

ü   Standardized applications assure consistency regardless of vendor

ü   Supported by hundreds of manufacturers

ü   Tree topology appropriate for large networks

ü   Choice of transmission media

ü   Backward compatible with former European Installation Bus (EIB)



ü   Topology: Tree, line and star topologies (or any combination)

ü   Media:

- Twisted pair (KNX TP): KNX is transmitted across a separate bus cable (recommended maximum of approximately 1,000m/3,280ft), hierarchically structure in lines and areas

- Power Line (KNX PL): KNX is transmitted on the existing mains network

- Radio frequency (KNX RF): KNX is transmitted via radio signals. Devices can be uni- or bidirectional

- IP/Ethernet (KNXnet/IP): This widespread communication medium can be used in conjunction with the KNXnet/IP specifications, which allow the tunnelling or routing of KNX frames encapsulated in IP frames


ü   Transport protocols: KNX communicates with other protocols via gateways



Fee required (paid by product manufacturer)

Regional relevance

Complies with International standard (ISO/IEC 14543-3), U.S. standard ANSI/ASHRAE 135,

Canadian standard CSA-ISO/IEC 14543-3, European standards CENELEC EN 50090 and CEN EN 13321-1, and China standard GB/T 20965.