A-B 440R-M23151 Safety Relay Module

Description

A-B 440R-M23151 Safety Relay Module

Product Dimensions：

The Allen-Bradley 440R-M23151 belongs to the Minotaur family of safety relays, specifically the MSR127TP series. This is one of the most versatile and widely used safety relays in industrial automation for monitoring safety circuits.

1. Product Overview

The 440R-M23151 is a high-performance safety monitoring relay designed to connect to a variety of safety input devices (like E-stops, light curtains, or safety gates). It provides redundant monitoring and prevents a restart in the event of a fault in the safety circuit.

2. Technical Specifications

The “TP” in the model name indicates Transistor Outputs for status and Pluggable terminals for easy maintenance.

3. Key Product Advantages

• Versatility: Can be configured for both automatic/manual reset or monitored manual reset, making it compatible with various safety strategies.

• Space-Saving: The 22.5mm slim housing allows for high-density mounting inside control panels.

• Removable Terminals: The pluggable terminal blocks significantly reduce downtime during replacement or maintenance.

• Diagnostic Features: Includes LED indicators for power, input status, and output status, allowing for rapid troubleshooting.

• High Safety Rating: Capable of meeting PLe (Category 4) according to ISO 13849-1 and SIL CL3 according to IEC 62061.

4. Safety Precautions & Installation

• Wiring Integrity: Ensure that the input wiring for dual-channel applications is cross-fault monitored to maintain the highest safety category.

• Power Supply: Always use a regulated 24V DC power supply to prevent damage from voltage spikes.

• External Fusing: Protect the safety outputs with appropriately rated fuses to prevent contact welding in case of a short circuit.

• Regular Testing: Safety relays should be functionally tested at least once a year (or more frequently depending on the risk assessment).

5. Typical Applications

The 440R-M23151 is commonly used in environments requiring reliable “Stop” functions:

• Emergency Stop Buttons: Monitoring single or dual-channel E-stop strings.

• Safety Gates: Used with interlock switches to ensure machinery stops when a guard is opened.

• Light Curtains: Interfacing with OSSD (Output Signal Switching Device) outputs from safety light screens.

• Pressure Sensitive Mats: Monitoring floor sensors in robotic cells.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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