Bus Topologies; Bus Lengths And Distances - Siemens Desigo RXB Technical Manual

Siemens
Building Technologies
4.5.2

Bus topologies

Caution: The bus technology is not to be confused with network structure.
It may, however, make sense to establish an analogous tree topology to the
network structure.
In the Konnex world tree, line and star topologies are freely interchangeable.
Ring or circle topologies are not permitted.
Tree
Star
4.5.3

Bus lengths and distances

The indications for distances and line lengths in a network are designed for bus
cables specified by KNX.
Distance of two bus power supplies
Distance of a bus device from the next
Bus power supply
Distance between two bus devices
Total length of all lines on one line
Installation guide RXB, RXL
Konnex bus technology
Line
Koppler
Gerät
Ring / circuit (PROHIBITED)
min. 200 m.
max. 350 m.
max. 700 m.
max. 1,000 m.
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28 Feb 2009