Velleman VMB4PD Instructions En Bref page 4

ENGLISH
1. Connection
For connection between the modules, use twisted pair cable (ex. EIB 2x2x0.8mm
(>50m) or if a lot of modules ( > 10) are connected to one wire, use minimum 0.5mm² cable
Connect the 12-18Vdc (mind the polarity) and connect the bus wires (mind the polarity). See also the example on page 2.
VMB4PD
L H
-12V+
BUS
TWISTED
PAIR
2
(0.5mm )
2. Termination
H
Velbus
L
+
12V Power supply
-
4
H
BUS
L
+
12V
-
If in case of a power failure you desire a backup for the internal clock:
Connect a 9V battery (Use the included cable) .
This is only needed on 1 module (see also page 7).
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 (e.g. the last control module), NOT on each end point.
Generally, only 2 termination jumpers will be used.
2
, UTP 8x0.51mm - CAT5 or other). For long wiring
12V Power supply
Terminator
H
Velbus
+
L
+
-
-