Page 102 - Basic Course

KNX BASIC COURSE

7.1 Two power supply units in one line

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KNX

Ps / Ch Ps / Ch
Minimum distance between power
supplies as specified by the manufacturer

Figure 9: Two power supply units in one line
If more than 30 bus devices are connected at a short distance from one other (e.g. in a
distribution board), the power supply unit should be installed in the vicinity of this group of
devices.

If an additional power supply unit needs to be installed, the minimum distance between
the two power supply units shall be taken from the power supply unit specifications of the
manufacturer.

It is not allowed to have more than two power supply units in one line.

Home and Building Management Systems KNX Association
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