440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
    440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
    440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
    440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM
440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM

440R-EM4R2 | Allen-Bradley Guardmaster Expansion Module EM

Part #: 440R-EM4R2 Manufactured by: Allen-Bradley
$209.00
$209.00
8 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
Allen Bradley 440R-EM4R2 Guardmaster Expansion Module Safety Relay (EM), 1 N.C. Single Wire Safe Input, 1 N.C. Single Wire...  Read more
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Product Description P/N: 440R-EM4R2

Description / Specifications

Description 

The Allen-Bradley 440R-EM4R2 is a Guardmaster safety relay designed for monitoring safety devices and controlling safety circuits. It provides redundant relay outputs to achieve high safety integrity and dependable machine shutdown.

 

 

Technical Specifications 

Condition New/Never Used
Brand Allen-Bradley
Sub Brand Guardmaster
Part Number 440R-EM4R2
Type Expansion Module
Coil 24 V
Contact Configuration Output: 4NO Immediate Safety, 1SS Immediate Auxiliary
Mounting 35 MM DIN Rail
Resistance 900 OHM
Enclosure IP20, IP40, NEMA 1
Withstand Voltage 2500 V
Connection Screw Terminal
Size 119.4 MM Height X 22.5 MM Width X 113.6 MM Depth
Contact Material Silver Nickel
Operating Cycles Mechanical: 10000000
Temperature Rating -5 To 55 DEG C
Series A
Weight 0.18 kgs

  

 

Information About 440R-EM4R2

The 440R-EM4R2 is part of the Allen-Bradley Guardmaster 440R series of safety relays, developed to provide reliable, cost-effective safety monitoring for machinery. This module supports dual-channel safety inputs for connection to devices such as emergency stop buttons, safety interlock switches, and protective sensors. It provides 4 normally open (NO) safety outputs and 2 normally closed (NC) auxiliary contacts for signaling and control flexibility. The relay is designed to meet SIL 3 (IEC 61508) and PLe (ISO 13849-1) safety requirements, ensuring compliance with global machine safety standards. DIN rail–mounted and compact, the 440R-EM4R2 includes LED status indicators for simple diagnostics, making it easy to integrate and maintain in safety systems.

Key Features:

  • Design: Compact Guardmaster safety relay for machine safety monitoring.
  • Inputs: Dual-channel inputs for E-stops, interlocks, and safety sensors.
  • Outputs: 4 NO safety outputs and 2 NC auxiliary contacts.
  • Safety Rating: Certified to SIL 3 and PLe standards for functional safety.
  • Diagnostics: LED indicators provide status and fault monitoring.
  • Compatibility: Works with a wide range of Allen-Bradley safety devices.
  • Installation: DIN rail mounting for easy panel integration.
  • Application Range: Suitable for emergency stops, light curtains, gate switches, and machine guarding.

The 440R-EM4R2 delivers the reliability, compliance, and protection required for modern safety-critical automation systems.

Frequently Asked Questions about 440R-EM4R2
Question: What is the Allen-Bradley Guardmaster Expansion Module EM 440R-EM4R2 used for?
Date Update:28/05/2025
Answer:

The 440R-EM4R2 is an expansion module designed to work with the Allen-Bradley Guardmaster safety relays. It provides additional input/output channels, allowing for expanded functionality in safety systems. This enables greater flexibility and scalability in applications that require more safety-related control and monitoring.

Question: What safety functions does the Guardmaster Expansion Module provide?
Date Update:28/05/2025
Answer:

The Guardmaster Expansion Module EM provides enhanced I/O capabilities for safety functions like emergency stop, safety interlock, and other critical safety-related applications. It is designed to ensure compliance with safety standards and reduce the risk of unsafe operations in industrial environments.

Question: How do I troubleshoot if the 440R-EM4R2 isn’t working properly?
Date Update:28/05/2025
Answer:

If the module is not functioning correctly, first check all wiring and connections to ensure they are secure. Verify that the power supply is providing the correct voltage. Check the safety relay’s configuration settings and ensure they are compatible with the expansion module. If the issue persists, consult the product’s troubleshooting section in the manual or contact Allen-Bradley customer support for further assistance.

Question: What is the lifespan of the 440R-EM4R2 Expansion Module?
Date Update:28/05/2025
Answer:

The lifespan of the module depends on the operating conditions, including the environment, frequency of use, and maintenance. Typically, with proper care and maintenance, industrial components like the Guardmaster Expansion Module are designed to function effectively for several years. Regular checks and adherence to manufacturer guidelines can help extend its service life.

Question: How do I update the firmware on the 440R-EM4R2 Expansion Module?
Date Update:28/05/2025
Answer:

Firmware updates for the 440R-EM4R2 are typically handled through the Allen-Bradley system interface. Check the product manual or Allen-Bradley’s website for instructions on obtaining and installing firmware updates. Always ensure that you are using the correct version of firmware for your specific configuration to avoid compatibility issues.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 440R-EM4R2 is a Guardmaster safety relay designed for monitoring safety devices and controlling safety circuits. It provides redundant relay outputs to achieve high safety integrity and dependable machine shutdown.

 

 

Technical Specifications 

Condition New/Never Used
Brand Allen-Bradley
Sub Brand Guardmaster
Part Number 440R-EM4R2
Type Expansion Module
Coil 24 V
Contact Configuration Output: 4NO Immediate Safety, 1SS Immediate Auxiliary
Mounting 35 MM DIN Rail
Resistance 900 OHM
Enclosure IP20, IP40, NEMA 1
Withstand Voltage 2500 V
Connection Screw Terminal
Size 119.4 MM Height X 22.5 MM Width X 113.6 MM Depth
Contact Material Silver Nickel
Operating Cycles Mechanical: 10000000
Temperature Rating -5 To 55 DEG C
Series A
Weight 0.18 kgs

  

 

Information About 440R-EM4R2

The 440R-EM4R2 is part of the Allen-Bradley Guardmaster 440R series of safety relays, developed to provide reliable, cost-effective safety monitoring for machinery. This module supports dual-channel safety inputs for connection to devices such as emergency stop buttons, safety interlock switches, and protective sensors. It provides 4 normally open (NO) safety outputs and 2 normally closed (NC) auxiliary contacts for signaling and control flexibility. The relay is designed to meet SIL 3 (IEC 61508) and PLe (ISO 13849-1) safety requirements, ensuring compliance with global machine safety standards. DIN rail–mounted and compact, the 440R-EM4R2 includes LED status indicators for simple diagnostics, making it easy to integrate and maintain in safety systems.

Key Features:

  • Design: Compact Guardmaster safety relay for machine safety monitoring.
  • Inputs: Dual-channel inputs for E-stops, interlocks, and safety sensors.
  • Outputs: 4 NO safety outputs and 2 NC auxiliary contacts.
  • Safety Rating: Certified to SIL 3 and PLe standards for functional safety.
  • Diagnostics: LED indicators provide status and fault monitoring.
  • Compatibility: Works with a wide range of Allen-Bradley safety devices.
  • Installation: DIN rail mounting for easy panel integration.
  • Application Range: Suitable for emergency stops, light curtains, gate switches, and machine guarding.

The 440R-EM4R2 delivers the reliability, compliance, and protection required for modern safety-critical automation systems.

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