Rockwell Automation Publication 440R-UM013F-EN-P - July 2021 7
Preface
This manual is a reference guide for the family of Guardmaster® Safety Relays
(GSR). It describes the procedures that you use to install, wire, and
troubleshoot your relay. This manual also gives an overview of the operation of
safety relays.
Summary of Changes This manual contains new and updated information as indicated in the
following table.
Who Should Use This
Manual
Use this manual if your responsibilities include design, installation,
programming, or troubleshooting of control systems that use safety relays,
including catalog numbers:
• 440R-S13R2 (CI safety relay)
• 440R-D22R2 (DI safety relay)
• 440R-D22S2 (DIS safety relay)
• 440R-EM4R2 (EM safety relay)
• 440R-EM4R2D (EMD safety relay)
• 440R-S12R2 (SI safety relay)
You must have a basic understanding of electrical circuitry and familiarity
with safety-related control systems. If you do not have this knowledge, obtain
the proper training before using this product.
Definitions 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.
• N.C. (Normally Closed) - An electrical contact whose normal state is in
the closed position.
• N.O. (Normally Open) - An electrical contact whose normal state is in the
open position.
• PLC - A programmable logic controller or a programmable automation
controller.
• Reaction Time - The time between the true states of one input to the ON
state of the output.
• Recovery Time - The time that is required for the input to be in the LO
state before returning to the HI state.
• Reset - Safety relays offer two types of reset: Monitored manual and
automatic/manual.
- Monitored Manual - The safety relay performs a reset function when
the reset signal goes from OFF to ON and then back to OFF in a
prescribed time-period. The reset occurs on the trailing edge.
Topic Page
Updated Figure 6 18
Updated Figure 11 22
Updated Safedge Safety Edges 23
Updated Recovery Time 64
Updated SWS Connections L11 and L12 65
Updated Table 19 84
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