Rockwell Automation 1756-SPESMNRMXT GuardLogix Controllers User Manual - Manuel (Page 11)

Rockwell Automation Publication 1756-UM020I-EN-P - August 2012 11
Preface
This manual is a guide for using GuardLogix ™ controllers. It describes the
GuardLogix-specific procedures you use to configure, operate, and troubleshoot
your controller.
Use this manual if you are responsible for designing, installing, programming, or
troubleshooting control systems that use GuardLogix controllers.
You must have a basic understanding of electrical circuitry and familiarity with
relay logic. You must also be trained and experienced in the creation, operation,
and maintenance of safety systems.
For detailed information on related topics like programming your
GuardLogix controller, SIL 3/PLe requirements, or information on standard
Logix components, see the list of
Additional Resources on page 13 .
About 1756 GuardLogix
Controllers Two lines of 1756 GuardLogix™ controllers are available. These controllers share
many features, but also have some differences.
Table 1 provides a brief overview of
those differences.
Topic Page
About 1756 GuardLogix Controllers 11
Understanding Terminology 12
Additional Resources 13
Table 1 - Differences Between 1756-L7xS and 1756-L6xS Controllers
Feature 1756-L7xS
(1756-L71S, 1756-L72S, 1756-L73S,
1756-L7SP 1756-L73SXT, 1756-L7SPXT) 1756-L6xS
(1756-L61S, 1756-L62S,
1756-L63S, 1756-LSP)
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
Memory, nonvolatile Secure Digital (SD) card CompactFlash card
Status indicators Scrolling status display and LED status
indicators LED status indicators