Table of Contents
Who Should Use This Manual
Summary of Changes
Definitions
This user manual is a reference guide for the GuardLink™ safety system, plug-in
modules, and accessories. It describes the procedures that you use to install,
wire, and troubleshoot your relay. This manual explains how to install and wire
your relay and gives you an overview of the GuardLink safety system
Use this manual if you are responsible for the design, installation,
programming, or troubleshooting of control systems that use the GuardLink
safety system.
You must have a basic understanding of electrical circuitry and familiarity with
safety-related control systems. If you do not, obtain the proper training before
using this product.
This manual contains new and updated information as indicated in the
following table.
Topic
Updated bracket catalog number on front cover
Updated the Tap Installation section
Updated pin description table for
Updated the Add Relays to the 440R-ENETR Interface section
Added
Chapter 10
Publication
AG-7.1
contains a glossary of terms and abbreviations that are
used by Rockwell Automation to describe industrial automation systems. The
following is a list of specific terms and abbreviations that are used in this
manual.
• Electrical Mechanical Safety Switch (EMSS) - A type of tap that
interfaces with safety devices that have redundant voltage-free contacts.
The tap generates pulse tests to detect short circuits to the DC power
supply, short circuits to the DC common, and shorts circuits between
the two contacts.
• GuardLink Control, Lock, and Unlock (CLU) Signal - This signal is
either static or dynamic. When static, this signal is LO when the system
is operational and HI when a demand is placed on the safety system. The
signal is dynamic when an unlock command is issued to Power to
Release guard locking devices.
• GuardLink Operational State - All taps on the GuardLink circuit
indicate that their associated safety device is ready for the machine to
operate.
• GuardLink Safe State - One or more of the taps on the GuardLink
circuit indicate that their associated safety device is not ready for the
machine to operate.
Rockwell Automation Publication 440R-UM015C-EN-P - April 2018
Figure 25
Preface
Page
Front Cover
34
40
63
83
7
Table of Contents
