Topology Of The Bus System - HomeMatic HMW-IO-12-Sw7-DR Assembly, Installation And Operating Manual

5.2 Topology of the bus system

The HMW components should always be mounted in
groups of sub-divisions to provide a better overview.
The number of sub-divisions that is appropriate de-
pends on the type and size of the project and is to be
defined accordingly.
Installing at least one sub-division on each level is
recommended. Larger buildings may require planning
several sub-divisions per level (e.g. separate for every
floor). All load and control wiring should also be run
in a star format to the respective sub-divisions. The
power supply is done through a DIN rail power supply
HMW-Sys-PS7-DR or another 24 V power supply
dimensioned according to the number and total current
consumption of all existing modules in the respective
sub-division. If central programming and control is to
be done through the Homematic Centre, the HMW
bus lines for the individual sub-divisions and the lines
coming from the control PC or a Centre should be
run together in a room according to available space
in order to achieve a separation of the individual bus
segments and to simplify troubleshooting if necessary.
Normally, this is the room in which the Homematic
system Centre is installed.
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