Allen-Bradley 440R-EM4R2 | Guardmaster Safety Relay Expansion Module (EM, 24V DC)

Overview

The Allen-Bradley 440R-EM4R2 is a Guardmaster expansion safety relay module designed to extend the output capacity of your safety system. Operating at 24V DC, it features 4 N.O. immediate safety outputs, 1 N.C. single-wire safe input, 1 N.C. single-wire safe output, and 1 N.C. solid-state auxiliary output. The module is DIN-rail mountable and includes removable terminals for quick installation and maintenance.

It integrates seamlessly with other Guardmaster relays, providing flexibility and scalability in safety-critical applications.

Key Features

• Expansion Module (EM) – Designed for use with Guardmaster safety relays

• 4 N.O. Immediate Safety Outputs – For direct actuation of safety devices

• 1 N.C. Single-Wire Safe Input – Safe signal pass-through

• 1 N.C. Single-Wire Safe Output – Enables daisy-chaining of safety logic

• 1 N.C. Solid-State Auxiliary Output – Immediate status signaling

• 24V DC Operation – Standard for safety control circuits

• Removable Terminals – Easy wiring and field replacement

• Compact DIN-Rail Mount Design – Ideal for panel integration

Technical Specifications

• Catalog Number: 440R-EM4R2

• Type: Expansion safety relay module

• Power Supply: 24V DC

• Safety Inputs: 1 N.C. single-wire input

• Safety Outputs: 4 N.O. relay outputs

• Safe Output Pass-Through: 1 N.C. single-wire output

• Auxiliary Output: 1 N.C. solid-state output

• Mounting: DIN rail

• Terminals: Removable

• Operating Temperature: -5°C to +55°C

• Standards Compliance: ISO 13849-1 (up to PLe), IEC 62061 (up to SIL 3)

Applications

• Machine Safety Systems – For expanding safety output capabilities

• Emergency Stop Circuits – Reliable relay switching

• Industrial Equipment – Add-on for multi-device safety control

• Safety Gate and Interlock Monitoring

Why Choose the 440R-EM4R2?

• Seamless integration into Guardmaster systems

• Flexible output expansion for safety functions

• Supports safety certifications up to SIL 3 / PLe

Order Now

In stock and ready for fast global shipping. Ask about compatibility with your existing Guardmaster safety relay.