890CS & 890CD Common Bus Units 4-34
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
4.1: Power-up with 24V DC
You must provide an external 0V and +24V DC
(±10%) control supply. Each unit, including the
Common Bus Supply, can draw 2A, so for example:
3 units = 6A.
Connect 24V DC to terminal X01/01 or X02/02,
and 0V (24V) to terminal X01/03 or X01/04 on the
890CS Common Bus Supply. The units are
protected against reversal of this 24V DC supply.
Use the spare X01 terminals to daisy-chain the
control supply to terminal X13 on the 890CD
Common Bus Drive(s) in the system. Up to four
890CS units may be linked in this way.
The diagram shows the control supply daisy-
chained between the 890 Supply and Drive units.
IMPORTANT This Control Supply will power the units for
configuration purposes. It is not required by the
890CD Common Bus Drive when the DC link is
present, but can be left connected. It is always
required by the 890CS Common Bus Supply.
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