Can I Have More Than 64 Devices on a KNX Line?

The number of devices in each line segment has historically been limited to 64 to ensure KNX telegrams are not affected by signal degradation.Hoewever with newer KNX devices it is possible to have 256 devices per line. 

Either way the power limitation need to be considered which is based on the size of the KNX power supply on the line and the total current of devices. 

To expand the system beyond 256 devices, you will need to use a line coupler to create an area.

For more information on this, check out this essential guide.