Support Article

How many devices can be on a KNX System?

A single line segment can have 64 devices and three additional segments can be connected to this line each with another 64 devices. 15 of these lines can be linked to an area and 15 areas can be linked to a backbone line. 49 devices can also installed on each of the area lines and backbone area lines. This gives a total of 58,384 devices.

Devices Per line inc Line Coupler + Line Repeater256
* number of Areas15
+ Devices on Line 0 inc Area coupler49

* number of Areas15
+ Devices on Area 0 inc IP Router at 0.0.049

The numbers above include the line couplers used to link lines and areas together but don't include power supplies as these don't have an address within the KNX architecture.