Rockwell Automation Publication 1756-UM001M-EN-P - February 2012 11
Preface
ControlLogix Controllers
Overview
There are three types of ControlLogix controllers available. These types include
the following:
• Traditional ControlLogix controllers
• Extreme environment ControlLogix controller
• Safety GuardLogix controllers
This manual explains how to use traditional and extreme environment
ControlLogix controllers.
For more information about using safety GuardLogix controllers, see the
GuardLogix Controller Systems Safety Reference Manual, publication
1756-RM093,
or the GuardLogix Controllers User Manual, publication
1756-UM020
.
Traditional ControlLogix Controllers
Two lines of traditional ControlLogix controllers are now available. These
controllers are identified as 1756-L6x controllers and 1756-L7x controllers
according to abbreviations of their full catalog numbers.
Table 1 - ControlLogix Catalog Numbers
The traditional ControlLogix controllers share many similar features, but also
have some differences. Table 2 provides a brief overview the differences between
the controllers. For further details about these features and differences, see the
appropriate chapters of this manual.
Table 2 - Differences Between 1756-L7x and 1756-L6x Controllers
Abbreviated Cat. No. Cat. No.
1756-L6x 1756-L61, 1756-L62,
1756-L63, 1756-L64,
1756-L65
1756-L7x 1756-L71, 1756-L72, 1756-L73,
1756-L74, 1756-L75
Feature 1756-L7x 1756-L6x
Clock support and backup used for
memory retention at powerdown
Energy Storage Module (ESM) Battery
Communication ports (built-in) USB Serial
Connections, controller 500 250
Logix CPU (processor) Dual-core Single-core
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