4connection – Velleman VMB3PS User Manual
Page 4
Velbus manual VMB3PS– edition 1 – rev.1.0
4
CONNECTION
The power module is equipped with three 12VDC outputs, each delivering 1A. Connect the 12V voltage outputs of
the power module to the 12V power inputs of the preceding modules (mind the polarity). Note that the total
consumption of the connected modules on one DC output may not exceed 1A. Make sure to use an appropriate
wire gauge (1mm2 or more) with very long connections. Connect a 12V transformer delivering min. 3A to the
power module input. Refer to one of the following connection diagram depending on the transformer:
Transformer with 2 x 6V secondary voltage :
L
H
BUS
VMB...
+
12V
-
VMB3PS
+
12V
-
-
12V
+
12V
- +
A
B C D E F
1A max.
12V/1A max.
+
-
12V/1A max.
+
-
Prim.
6V Sec.
Circuit breaker
AC Power
N
L
To power loads
N
L
6V Sec.
Transformer with 2 x 6V secondary voltage and centre tap:
L
H
BUS
VMB...
+
12V
-
VMB3PS
+
12V
-
-
12V
+
12V
- +
A
B
C D E
F
1A max.
12V/1A max.
+
-
12V/1A max.
+
-
Prim.
6V Sec.
Circuit breaker
AC Power
N
L
To power loads
N
L
6V Sec.