22
Service Manual
www.selema.it
DC 4Q A Series
+
+
+
+
+
+
+
+
-
-
-
-
-
-
-
-
Power supply
Power supply
NO
YES
EMC note
In the case of multiple servodrives on the same power supply, make connections-type stars, see
drawing back. Connect also feed converters using the shortest cable possible. If the cable length
exceeds 2m, twist the + and - leads together as twisted pairs.
Multiple connection
The drives have to be supplied from an isolating rectified transformer secondary or a DC isolated
power supply.
The conformity is assured only if it is installed following the precise assembly criteria expressed
below. The fundamental assembly characteristics are summarized below:
1) The correct ground connection of predisposed parts.
2) Using the division of cables technique. Separate power cables from signal cables.
3) Use of shielded cables, both for power connection (to the transformer and the motor), and for
signal connection (also to the controller).
4) Use of appropriate network to filter the line (transformer input), from disturbances conducted or
produced by the drive. (series of filters released are available for this purpose)
3.2
Note about connections
