Allen Bradley 440R-M23143 GuardMaster Monitoring Safety Relay

Product Introduction

The Allen Bradley 440R-M23143 Guardmaster Monitoring Safety Relay is a compact and configurable safety control device designed for monitoring emergency stop circuits, safety gates, and machine guarding systems in industrial automation environments. It is part of the Guardmaster safety relay family, widely used for centralized safety logic and machine protection applications.

This relay provides both immediate and delayed safety outputs, allowing it to handle complex safety sequences such as controlled machine shutdowns and timed safety operations. With flexible reset modes including automatic, manual, and manual monitored reset, it supports different machine safety architectures and compliance requirements.

Designed in a 45 mm housing, the unit saves panel space while maintaining advanced safety functionality. It operates on 24V AC/DC power supply and features removable terminals for easier installation, wiring, and maintenance. The built-in timing function (0.15 to 3 seconds) enables precise control of safety delay operations, making it suitable for applications requiring controlled stop sequences.

Product Specifications

Applications

• Emergency Stop Systems: Used to monitor and control emergency stop circuits in industrial machinery.

• Safety Gate Monitoring: Ensures safe operation by controlling access doors and interlock systems.

• Machine Shutdown Control: Provides both immediate and delayed shutdown functions for controlled stopping.

• Industrial Automation Systems: Used in production lines requiring centralized safety relay logic.

• OEM Machinery Safety Design: Suitable for machine builders implementing flexible safety architectures.

Advantages

• Compact 45 mm Design: Saves valuable panel space while providing advanced safety functionality.

• Dual Output Functionality: Supports both immediate and delayed safety outputs for flexible control.

• Configurable Reset Modes: Offers automatic, manual, and monitored reset options for different safety requirements.

• Built-in Timing Function: Adjustable delay (0.15–3s) enables controlled machine stop sequences.

• Removable Terminals: Simplifies wiring, maintenance, and replacement operations.

• Reliable Safety Monitoring: Designed for consistent performance in industrial safety systems.

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