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5 General information on
Bus system
5.1 General information on the installation
Basically, the connections of the HMW components
can be divided into two groups. In the load side and
in the control side (24 V power supply, button inputs,
RS485 Bus).
Load side
Since normally a 230 V consumer is on the load
side, using VDE-conforming installation wires, such
as e.g. NYM wiring, etc. is required. The wire cross-
section conform with the standard VDE regulations
and is 1.5 mm2 for installations in the nominal load
range of actuators.
Control side
On the control side however, only non-hazardous
safety extra-low voltages are used. Since there is
electrical isolation between the load and control
sides in the module, no mains power capable wires
have to be used. Using interior telecommunications
wiring or comparable control wiring is recommend-
ed. Make sure however, that the wires of the load
