User manual

9Publication 1756-RM093F-EN-P - January 2010 9
Preface
Introduction
About This Publication
This manual is intended to describe the GuardLogix controller system,
which is type-approved and certified for use in safety applications
up to and including SIL 3 according to IEC 61508 and IEC 62061,
safety applications up to and including Performance Level PLe
(Category 4) according to ISO 13849-1.
This publication covers both 1756 and 1768 GuardLogix controller
systems. When ‘GuardLogix controllers’ is used alone in this
publication, it refers to both 1756 and 1768 GuardLogix controllers.
Information specific to one controller type will include the bulletin
number, 1756 or 1768.
Who Should Use This
Publication
Use this manual if you are responsible for the development,
operation, or maintenance of a GuardLogix controller-based safety
system. You must read and understand the safety concepts and
requirements presented in this manual prior to operating a
GuardLogix controller-based safety system.
Topic Page
About This Publication 9
Who Should Use This Publication 9
Understanding Terminology 10
Additional Resources 11