Rockwell Automation 1768-L43_L45_L43S_L45S CompactLogix Controllers Installation Instructions - Manual (Page 8)

8 CompactLogix Controllers
Publication 1768-IN004D-EN-P - December 2009
Module Placement
Follow these requirements to determine proper placement of your
1768 controller, power supply, 1768 I/O modules, and 1769 I/O
modules:
•
Place the 1768-L4 xx controller so that it is the last module
(furthest away from the power supply) in the 1768 backplane.
•
The 1768 CompactLogix power supply distributes power from
the right side of the supply and must be the leftmost module
in the system.
•
Up to eight 1769 I/O modules can reside in the local bank.
•
The local bank is powered by a 1768 power supply.
•
Up to two remote banks of 1769 I/O modules may be
connected by using 1769-CRL
x extension cables.
•
Remote banks are powered by a standard 1769 power supply.
IMPORTANT
CompactLogix System Distance Ratings
Because the 1768 CompactLogix power supply works with the controller to
power a 1768 system, the distance rating in a 1768 CompactLogix system differs
from that in a 1769 CompactLogix system.
In the 1768 system, the distance rating is the distance between 1769 I/O modules
and the controller. In the 1769 system, the distance rating is the distance
between 1769 I/O modules and the power supply.
1768 Backplane (local)
1768 Controller, Power
Supply, and I/O Modules
Remote Bank
1769 Power Supply and
I/O Modules
1769 Backplane