Velleman VMB1USB - Manual (Page 4)

Velbus manual VMB1USB– edition 1 – rev.1.0
4
CONNECTION
For connection between the modules, use twisted pair cable (ex. EIB 2x2x0.8mm2, UTP 8x0.51mm - CAT5 or
other). Use minimum 0.5mm² cable. For long wiring (>50m) or if a lot of modules ( > 10) are connected to one
wire, use 1mm² cable. Connect the 12-18Vdc (mind the polarity) and connect the bus wires (mind the polarity).
Connect the module with a USB port on the computer. You can us one of the following Velleman USB cable
types: CW076, CW077, CW078, CW090A, CW090B or CW090C.
H
L
-
+
BUS
12V
VMB1USB
L H
-12V+ BUS
TWISTED
PAIR
(0.5mm ) 2
To USB-Port
Termination
If the module is connected at the start or end of a cable on the VELBUS, place the ‘TERM’ jumper.
Remove the jumper in all other cases.
If different cable wiring topologies (tree, star, loop, ...) are used, place a jumper on the end module of the longest
cable only, NOT on each end point.
Remark:
The USB computer connection is electrically separated from the VELBUS and the 12V power cable via an
optical link.