VELBUS INSTALLATION GUIDE
©2015 Velbus
25
www.velbus.eu
If problems should occur while installing or during initial configuration, these
are almost always due to faulty wiring or bad contacts and can easily be fixed
by correcting the wiring problem.
We strongly advise to pay special attention
to the bus wiring while installing the system
, as fixing a wire problem
afterwards is much more difficult. Make sure all wires are correctly connected
(pay attention to +/- and H/L polarities), that they are inserted deep enough
into the connectors and on the correct side of the fastening cage, that the
screws are well fastened and the wires not broken or bent too far. When
working with UTP cable, make sure that the wires do not break in the module
terminals, especially if these are put in and taken out of the wall repeatedly.
This attention to detail will save a lot of searching later. Stranded core cables
are more forgiving in this respect.
The modules in your electrical cabinet must be connected in the same way. The
wiring rail VMBRAIL can be used along a DIN rail to link multiple modules at
once.
This rail can be easily cut so you can also use it to link fewer modules if required.
Caution: Take care when connecting the VMBRAIL and bus cables into
terminals: the VMBRAIL pins are thicker than most of the bus cable. Try to place
the VMBRAIL in front of other cables, or use conductor ferrules on your bus
cables.
Distribution terminal block
To facilitate wiring in the electrical cabinet and
allow for easy isolating of branches of the
installation, Velbus also provides the VMBTB bus
terminal. This distribution terminal block easily
connects up to 8 bus cables of 4 wires. The spring
contacts allow to connect or disconnect each
cable separately.
Summary of Contents for VMB4RYLD
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