Overview

The Allen-Bradley 440R-S13R2 Guardmaster safety relay is a legacy-compatible monitoring relay designed for industrial safety-related control systems in machinery. This single-input model supports dual-channel universal inputs, making it ideal for monitoring emergency-stop circuits and proximity switches. The 440R-S13R2 operates on 24 V DC with low power consumption, fitting seamlessly into compact control enclosures and DIN rail installations.

Key Features

• Dual-Channel Input Monitoring: One dual-channel universal input with cross-fault detection capabilities for enhanced safety diagnostics.
• Three Normally Open (NO) Outputs: Provides three immediate safety outputs for controlling downstream safety circuits.
• Flexible Reset Modes: Supports both manual monitored and automatic/manual reset configurations.
• Single-Wire Safety (SWS) Compatible: Allows coordination with other Guardmaster devices over a single wire plus ground, enabling modular safety system design.
• Compact DIN Rail Mount: 22mm enclosure with IP40 protection rating, designed for installation in control cabinets with minimum IP54 environments.
• Proven Durability: Rated for 10 million mechanical cycles, ensuring long service life in demanding industrial environments.

Technical Specifications

• Input Type: One dual-channel universal input (compatible mode); supports 2-channel safety inputs in 4-wire connection.
• Outputs: Three normally open (N.O.) immediate safety outputs; one N.C. auxiliary output.
• Power Supply: 24 V DC, 3.5 W power consumption.
• Input Resistance (Max): 900 ohms.
• Output Current (Thermal): Up to 6 A.
• Reset Modes: Manual monitored or automatic/manual reset.
• Cross-Fault Detection: Monitors 2-channel inputs in 4-wire connection configuration.
• Mechanical Life: 10 million cycles.
• Enclosure: Polyamide with IP40 protection rating.
• Mounting: 22mm DIN rail.
• SIL Rating: Suitable for safety-rated control systems (SIL-rated application dependent).
• Standards: CCC, KC certification.

Typical Applications

The 440R-S13R2 is widely used in industrial automation for:

• Emergency-stop (E-stop) circuit monitoring and safety interlocking.
• Safety gate and guard door monitoring on production machinery.
• Proximity switch monitoring for machine hazard detection.
• Coordination with GuardLink-enabled smart safety devices for system status visibility.
• Small-to-medium safety systems using single-wire safety (SWS) signaling.
• Legacy system upgrades requiring compatible input safety relays.

Compatibility & Replacements

Compatible With

• Guardmaster safety relay series (DI, DIS, SI, GLP, EM, EMD models).
• GuardLink safety devices (when used with GuardLink-enabled smart sensors).
• Single-wire safety (SWS) networks for multi-relay coordination.
• Allen-Bradley Studio 5000 Logix Designer (legacy and current systems).
• EtherNet/IP communication modules (via optional gateway).
• Standard 24 V DC control systems with manual or automatic reset requirements.

Replaces / Drop-In Replacement For

The CI safety relay is compatible to the MSR127 safety monitoring relay. The 440R-S13R2 is the modern legacy-compatible equivalent for older MSR/safety monitoring systems requiring upgrades without redesign. Verify compatibility with your system integrator before ordering for specific legacy models.

Works With

• Rockwell Automation Studio 5000 Logix Designer (firmware support available).
• EtherNet/IP communication (with optional module attachment).
• Single-Wire Safety (SWS) protocol for relay-to-relay communication.
• Standard hard-wired safety circuits (no software required).
• Manual reset push-button and automatic reset timer circuits.