Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual - Manual (Page 74)

4-36 Wiring
Installing Ribbon Cables Ribbon cables are used for connecting:
• Between Regulator Board (BDSR) and Power Interface Board
(PIFS),
• Between Power Interface Boards (PIFS).
For a single unit or for master unit with multiple units connected in
parallel, the Regulator Board is connected to the Power Interface
Board with a ribbon cable. Also, ribbon cable is used for
connection between the Power Interface Boards of the master unit
and the slave unit, and between the Power Interface Boards of the
slave units.
Figure 4.18 shows typical connection with ribbon cables.
When multiple units are connected in parallel, the master unit must
be installed at the rightmost end viewed from the front side as
shown in Figure 4.18.
Figure 4.18
Wiring with Ribbon Cables
BDSR
PIFS
CN1
CN2
CN1
CN2 CN3
Unit 1 (Master Unit) Unit 2 (Slave Unit 1) Unit 3 (Slave Unit 2)
Single Unit
(8720MC-RPS027BM,
8720MC-RPS065BM,
or 8720MC-RPS190BM)
Parallel Connection
of 2 Units
(8720MC-RPS065BS or
8720MC-RPS190BS)
Parallel Connection
of 3 Units
(8720MC-RPS065BS or
8720MC-RPS190BS)
PIFS
CN1
CN2 CN3
PIFS
CN1
CN2 CN3
Note: In case two or three units of 8720MC-RPS Regenerative Power Supply Unit are installed in parallel,
the master unit must be installed at the rightmost end as shown in the above.