440R-EM4R2D

Overview of Allen-Bradley 440R-EM4R2D Guardmaster Expansion Module

The Allen-Bradley 440R-EM4R2D is a Guardmaster series expansion module designed to extend the functionality of safety relay systems. It features four normally open safety outputs with time delay and one solid-state auxiliary output. The module supports single-wire safety connections for simplified wiring while maintaining a high level of safety integrity.

Key Features of 440R-EM4R2D

• Four (4) delayed normally open safety relay outputs (4 N.O.).
• One (1) solid-state auxiliary (1 S.S.) output.
• Single-wire safety input for easy expandability and wiring.
• 24 V DC control supply voltage.
• Universal input compatibility with a wide range of safety devices.
• Configurable time delays for ON, OFF, and jog functions.
• Feedback monitoring for safe system operation.
• DIN rail mounting with detachable clamps for easy installation.
• IP20 enclosure terminal protection.
• Operating temperature range: -5 to 55 °C (23 to 131 °F).
• SIL 3 and Performance Level e certifications for functional safety.
• Dimensions: 119.4 mm height, 22.5 mm width, 113.6 mm depth.
• Weight: Approx. 0.22 kg.

Technical Specifications

Applications / Use Cases

The 440R-EM4R2D expansion module is commonly used to increase the number of safety outputs in Guardmaster safety relay systems for controlling safety-critical functions in industrial machinery. It is suitable for emergency stop circuits, guard locking, and timed safety outputs in system architectures demanding higher safety performance.