Rockwell Automation Publication 1756-RM093J-EN-P - April 2018 7
Preface
Summary of Changes
This publication contains new and updated information as indicated in the
following table.
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
CL 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.
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.
Understanding Terminology
The following table defines terms used in this manual.
Topic Page
Summary of Changes 7
Understanding Terminology 7
Additional Resources 8
Topic Page
Updated the definition of Safety Partner. 22
Removed 5570 controllers, which are covered by the GuardLogix 5570 and Compact
GuardLogix 5370 Controller Systems Safety Reference Manual, publication
1756-RM099.
Throughout
Table 1 - Terms and Definitions
Abbreviation Full Term Definition
1oo2 One out of Two Identifies the programmable electronic controller architecture.
CIP Common Industrial Protocol An industrial communication protocol used by Logix 5000™ based automation systems on Ethernet/IP™,
ControlNet™, and DeviceNet™ communication networks.
CIP Safety Common Industrial Protocol – Safety
Certified
SIL 3 -rated version of CIP.
CL Claim Limit The maximum SIL level that can be achieved.
DC Diagnostic Coverage The ratio of the detected failure rate to the total failure rate.
EN European Norm. The official European Standard.
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