Allen Bradley Guardmaster GSR Safety Relay

The Allen Bradley Guardmaster GSR safety relay product sample introduces 8 fixed function safety relays and 440C-CR30 software configurable safety relays, all of which meet PL e/Cat.4/SIL CL3 requirements and support emergency stop, door lock, safety grating, safety carpet, speed/static monitoring and other functions. Through single knob setting, single wire cascading, optical bus, EtherNet/IP, the network is simplified, covering single machine safety to medium-sized system integration, providing an economical, modular, and configurable three-level safety solution.

Product positioning and solution hierarchy

Rockwell offers a three-level safety control solution:

Economy type: Single function safety relay (small equipment, dedicated logic)

Mid end: Modular/Configurable Safety Relays (Multiple Safety Devices, Partition Control)

Highly integrated: Safety PLC+Safety I/O (GuardLogix/SmartGuard)

This article introduces the Guardmaster GSR fixed function safety relay and the 440C-CR30 software configurable safety relay.

GSR fixed function safety relay (8 types in total)

1. Unified specifications

Safety level: PL e, Cat.4, SIL CL3

Power supply: 24V DC

Width: 22.5mm, DIN rail installation

Input: Universal input (compatible with emergency stop, door lock, light grid, carpet)

Cascade: Single line secure connection, expandable to maintain SIL3/PL e

Configuration: Single knob setting (reset/delay/logic)

Communication: Optical bus, supporting 440R-ENETR EtherNet/IP gateway

2. Model and Function (Table)

Model, item number, core function, output type

DI 440R-D22R2 dual input, AND/OR logic 2 NO relay

DIS 440R-D22S2 dual input, solid-state output 2 PNP solid-state

SI 440R-S12R2 Single Channel Emergency Stop/General Safety 3 NO Relay

CI 440R-S13R2 single/dual universal, global emergency stop 3 NO relay

EM 440R-EM4R2 output extension, 4-channel instantaneous 4-NO relay

EMD 440R-EM4R2D output extension, 4-channel delay and 4-NO delay

GLT 440R-GL2S2T access control: Time delayed unlock 2 PNP+lock signal

GLP 440R-GL2S2P access control: speed/static unlock 2 PNP+lock signal

3. Core competencies

DI/DIS: integrates 2 relay functions and supports AND/OR logic

EM/EMD: Safe output extension, 4-channel, instantaneous/delayed optional

GLT/GLP: Safety door unlocking control:

GLT: Unlock after time delay shutdown

GLP: Speed/Static Monitoring Unlock (PLd/SIL2)

SI/CI: Global emergency stop, basic safety circuit

4. Network communication

440R-ENETR EtherNet/IP Gateway

A single gateway can connect up to 6 GSR relays

Supports line type, star type, and ring network

Realize diagnosis, status upload, and reduce downtime

440C-CR30 software can configure safety relays

1. Positioning

For medium-sized equipment with 4-9 safety circuits and up to 5 zones, software configuration is more flexible.

2. Core specifications

Embedded Security I/O: 22:00

Configuration software: Connected Components Workbench (CCW)

Communication: Modbus RTU, USB

Extension: Supports Micro800 plugin modules

Scenario: Single machine multi zone security, hybrid security+standard control

3. I/O structure

Type Quantity Function

Dedicated input 10 24V DC leakage type

Multi functional input 2 normal input/single line safe input

Multi functional terminal 6 input/test output/source type output

Dedicated output 2 24V DC source type

Multi functional output 2-source output/single line safety output

Certification and Standards

Functional safety: ISO 13849-1, IEC 62061, IEC 61508

Certification: CE, cULus, CCC, C-Tick, S-Mark

Shutdown Category: Supports Stop Category 0/1

Applicable devices and scenarios

Emergency stop button

Safety interlock switch (non-contact/electromechanical)

Safety grating/scanner

Safety carpet/pressure sensor

pull cord switch

Enabling switch

Safety door speed/static unlock

Key issues

Question 1: How to quickly select GSR 8 fixed function relays according to their functions?

answer:

Emergency stop/basic safety: Choose SI/CI

Dual safety equipment/logic combination: choose DI/DIS

Safe output point extension: Select EM (instantaneous)/EMD (delayed)

Security door delayed unlocking: choose GLT

Safety door speed/static unlock: choose GLP

Question 2: How does GSR achieve secure expansion and maintain a high level of security?

Answer: Cascade multiple relays through a single wire safety connection, while supporting optical bus communication; After expansion, PL e/Cat.4/SIL CL3 can still be maintained without complex wiring.

Question 3: What is the core difference between 40C-CR30 configurable relays and GSR fixed function relays?

answer:

GSR: Hardware knob setting, single function dedicated, lower cost, faster deployment

440C-CR30: Software configuration, 22 point safety I/O, up to 5 zones, supports Modbus, can mix safety and standard control, suitable for more complex standalone systems