Allen-Bradley 440R-N23120 Guardmaster MSR Safety Relay

Product Description

Product Overview

The Allen-Bradley 440R-N23120 is a high-integrity safety relay from the Guardmaster Minotaur / MSR family. It is designed to monitor emergency stop buttons, safety gates, interlock switches, light curtains, valves, tactile sensors, magnetic switches, and proximity sensors, ensuring machinery stops safely in hazardous situations.

This relay features dual-channel monitoring for redundancy and fault detection, providing maximum reliability for critical industrial safety systems. Its compact DIN-rail mountable design allows easy integration into standard control panels.

Electrical & Functional Details

• Rated operation current: 6 A at AC-15, 230 V; 3 A at DC-13, 24 V

• Control supply voltage: 24 V AC/DC

• Voltage type for actuating: AC/DC

• Safety category: ISO 13849-1 Category 4

• Performance level: PL e

• Number of undelayed safety outputs: 2

• Reset options: Manual monitored (configurable)

• Rail mounting: Supported

• Enclosure IP rating: IP20 (terminals), IP40 overall

Mechanical & Environmental Specifications

• Maximum shock acceleration: 10 g

• Maximum vibration displacement: 0.35 mm Pk-Pk

• Maximum vibration frequency: 55 Hz

• Dimensions (HxWxD): 75 × 22.5 × 110 mm

• Weight: 0.16 kg

• Operating temperature: –5 °C to +55 °C

• Storage temperature: –40 °C to +85 °C

• Humidity: 5–95% non-condensing

Key Features & Advantages

• High Safety Integrity: Meets SIL 3 and PL e standards for critical applications

• Dual-Channel Monitoring: Ensures redundancy and fault detection

• Flexible Reset: Manual monitored reset for configurable safety strategies

• Multiple Outputs: 2 safety outputs and 1 auxiliary contact for control integration

• Compact Design: DIN rail mountable, fits standard control panels

• Global Compliance: Certified UL, CE, CSA, and TÜV