
4-41
890CS & 890CD Common Bus Units
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
4.1: 890CS 24V DC Control Supply
You must provide an external 0V and +24V DC
(
±
10%) control supply. Each 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 X01 on another 890CS
Common Bus Supply in the system, if required. Up
to four 890CS units may be linked in this way.
The diagram shows the control supply daisy-chained
between 890CS units.
IMPORTANT
This Control Supply is always required by the
890CS Common Bus Supply.