Rockwell Automation 1769-L31 CompactLogix Controller Installation Instructions - Manual (Page 6)

6 1769-L31 CompactLogix Controller
Publication 1769-IN069C-EN-P - May 2008
Before You Begin
Use this document as a guide for installing the controller.
Consider the following when planning your CompactLogix system:
 The CompactLogix controller is always the leftmost module in the
system.
 The controller must be located within four modules of the system
power supply. Some I/O modules may be located up to eight modules
away from the power supply. See the documentation for your 1769
I/O modules for details.
 The 1769-L31 controller supports as many as 16 I/O modules in a
maximum of 3 I/O banks with 2 expansion cables.
 Each I/O bank requires its own power supply.
 Only one controller can be used in a CompactLogix system.
 A 1769-ECR right end cap or 1769-ECL left end cap is required to
terminate the end of the communication bus.
These components ship with the controller.
Component Description
You can also use these components with the controller:
 1756-CP3 or 1747-CP3 serial cable to connect a device to the
RS-232 port
 1784-CF64 or 1784-CF128 industrial CompactFlash card to add
nonvolatile memory
IMPORTANT The 1769-BA battery is the only battery you can use with the 1769-L31 controller.
1769-BA battery
1747-KY controller key