1. Overview of KNX
– KNX is an open standard for building automation.
– KNX devices manage lighting, HVAC, security systems, and more.
– KNX can use twisted pair, powerline, RF, or IP links.
– KNX is not hardware-specific.
– KNX is approved by international standards organizations.
2. Architecture and Configuration
– KNX devices connect via a twisted pair bus.
– Devices include sensors, actuators, controllers, and system components.
– KNX configuration involves network topology and individual node settings.
– KNX devices are categorized as A-mode, E-mode, and S-mode.
– Configuration can be local or network-managed.
3. Communication and Protocol
– KNX uses datapoints to represent process variables.
– Datapoints are grouped into functional blocks.
– The common kernel is shared by all devices on the KNX network.
– KNX kernel is OSI 7-layer model compliant.
– The kernel provides access control and logical link control.
4. Topology, Addressing, and Physical Layer
– KNX wired network can have tree, line, and star topologies.
– Up to 57,375 devices can be linked using 16-bit addresses.
– TP1 twisted pair bus provides data transfer at 9600 bit/s.
– Media access control is through CSMA/CA.
– KNXnet/IP integrates IP-enabled media like Ethernet and WiFi.
5. Certification and Integration
– Products with the KNX trademark must be certified by accredited third-party test labs.
– KNX logo-bearing products are programmed using the vendor-independent ETS software.
– KNX is related to home automation and intelligent building systems.
– KNX products can be integrated with Matter, a standard for home automation equipment.
– KNX systems can utilize touch panels and UPB for enhanced functionality.
KNX is an open standard (see EN 50090, ISO/IEC 14543) for commercial and residential building automation. KNX devices can manage lighting, blinds and shutters, HVAC, security systems, energy management, audio video, white goods, displays, remote control, etc. KNX evolved from three earlier standards; the European Home Systems Protocol (EHS), BatiBUS, and the European Installation Bus (EIB or Instabus).
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| International standard | EN 50090, ISO/IEC 14543 |
|---|---|
| Industry | Building automation |
| Website | knx |
It can use twisted pair (in a tree, line or star topology), powerline, RF, or IP links. On this network, the devices form distributed applications and tight interaction is possible. This is implemented via interworking models with standardised datapoint types and objects, modelling logical device channels.
