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KNX in Home Automation

by Connectedbynet / Wednesday, 07 July 2021 / Published in smart home automation technology
Home Automation Dubai KNX

Home automation is a vast subject, with many types of protocols and configurations. KNX is one of them, KNX, origin of the word is Konnex from Latin dictionary means connection. And is the globally standardized wire line system for the residential & non residential building automation, and have successfully replaced the 75% of predecessor market. It has replaced EIB (European International Bus), EHS (European Home System) & Baitbus which was use mainly in France.

Being stable wire system, KNX have become the first globally recognized standard systems, and is wide used in home automation, approved by various standards as below

United States of AmericaANSI / ASHRAE 135
European UnionEN 500900
ChinaGB / T 20965
InternationalISO / IEC 14543 – 3
CENEN 13321 – 1
Standards as recognised worldwide

It is hardware independent standard, and all the KNX products from any manufacturer can be operate with one another without failure. All the devices & data protocols are compliant with the KNX standards hence upward & downward compatibility is possible thereby making same as future proof.  Hence KNX devices are inter-operable and Networkable.  As the devices are capable to be connected with all the components in the network, the transparency as well as utilization of information across the network is possible. The availability for single cable bus for the integration for different systems helps in designing the seamless solution for home automation and other applications.

Communication Medias

The physical communication Medias as per this standard are Twisted pair wiring, Power line networking, Radio (KNX-RF), Infrared, Ethernet as used in home automation.

The main components for KNX are Sensors, Actuators and components generally referred as SAC . Sensors gather the information about the subject & object, and transmit same as data telegrams. While as actuators receive these data telegrams for action. And the components included application for connectivity on the bus. The topologies supported are tree, line & star while as ring topology is not permitted.

KNX logical topology in figures is as below

Devices on fully distributed line65,536
Address space16 bit
Devices/ Line256
Total lines15
Line coupler1
Segments per line4
Devices per segment64
Segment Length1000 Meters
Connections with segments4
Length in total for 256 Devices4000 Meters
Logical topology table

The twisted pair transmission using this standard are mathematically as below

Signaling speed9600 bit/sec
Wave resistance120 Ohms at 100 KHz
Line resistanceMin: 20 Ω/km, Max 75 Ω/km.
Maximum capacitancebus-to-bus line max 800 pF/m at 800 Hz.
Network nodes57600
MAC control length1000 Meters
Total segments4
Maximum length4000 Meters
Transmission standards

Models of communication

The modes of configuration are A, E & S means Automatic, Easy & System mode respectively. In Automatic mode devices are generally plug & play, in Easy mode little knowledge is require while-as in System mode high expertise is needed for design and installation.

It is widely used in building & home automation like Lighting, Blinds & Shutters, Security Systems, Energy Management, HVAC Systems, Monitoring Systems, Remote Control, Metering, Audio& Video systems etc.

KNX Association administers the KNX standards worldwide

For Smart home automation, design, supply, testing and commissioning , Kindly contact us at smart@ConnectedByNet.com  we will contact you as soon as possible. We offer honest and independent solutions, latest technology and best suited for your budget.

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