Allen-Bradley 440R-EM4R2 Guardmaster Safety Relay Expansion Module
The Allen-Bradley 440R-EM4R2 is a high-performance Guardmaster Safety Relay Expansion Module (EM) designed by Rockwell Automation. This module provides a cost-effective and efficient solution for expanding the number of safety-related outputs in industrial automation systems. It integrates seamlessly with a base Guardmaster safety relay via an advanced Single Wire Safety (SWS) connection, minimizing complex wiring layouts while maximizing system safety.
| Specifications | |
| Product Make | ALLEN-BRADLEY |
| Part Number / MPN | 440R-EM4R2 |
| Product Series | Â Guardmaster Safety Relays (GSR) |
| Device Type | Expansion Module (EM) |
| Supply Voltage | 24V DC (nominal control supply voltage) |
| Power Consumption | 3.5 W |
| Safety Outputs | 4 N.O. Electromechanical Relays (Immediate) |
| Auxiliary Outputs | Â 1 N.C. Solid-State / Transistor |
| Input Signal | Single Wire Safety (SWS) Input |
| Mounting | Standard 35mm DIN Rail |
| Condition | NEW |
| Warranty | 1 YEAR |
| Country of Origin | Germany |
| Protection Degree | IP40 (Housing), IP20 (Terminals) |
| Length | 113.6 mm |
| Width | 22.5 mm |
| Height | 119.14 mm |
| Weight | 225 g |










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