ALLEN-BRADLEY 440R-D23171 Guardmaster Safety Relay MSR125HP 24VDC

( Brand: Allen-bradley ), ( Manufacturer Part Number: 440R-D23171 ), ( Model: MSR125HP ), ( Part Type: Safety )

Review ALLEN BRADLEY New Guardmaster 24vdc Safety Relay

The Allen-Bradley Model 440R-D23171 GuardMaster MSR125HP 24VDC Safety Relay is a versatile and reliable safety solution for machinery and equipment applications. This safety relay is designed to meet the demands of industrial automation systems, providing reliable safety functions to protect operators and equipment.

The GuardMaster MSR125HP safety relay is a compact, 125 ampere, 24 volt direct current (VDC) safety relay. It offers 12 normally open (NO) and 12 normally closed (NC) contacts, allowing for multiple safety functions to be implemented. Each contact can handle a maximum contact voltage of 277 volts AC or 300 volts DC.

This safety relay features a digital display that provides clear indication of the relay status, including fault codes and diagnostic information. It also includes a built-in self-diagnostic test function, which can be initiated manually or automatically, ensuring that the safety functions are always operating correctly.

The GuardMaster MSR125HP safety relay is designed to meet the requirements of various safety standards, including EN 61850-2-10, IEC 61508, and SIL 3 (per IEC 61511). It is also certified to UL 508A and CSA C22.2 No. 61551-1-12 standards.

The safety relay is suitable for use in harsh industrial environments, with a temperature range of -40 C to 65 C (-40 F to 149 F). It features a rugged, sealed design to protect against dust, water, and other contaminants. The relay is also designed to be easy to install and integrate into existing automation systems, with a wide range of mounting options and terminal configurations.

The Allen-Bradley Model 440R-D23171 GuardMaster MSR125HP 24VDC Safety Relay is an essential safety component for any industrial automation system, providing reliable protection for equipment and operators. Its advanced features, compact design, and compliance with various safety standards make it a popular choice for applications where safety is a top priority.

The Allen-Bradley GuardMaster MSR125HP 24VDC Safety Relay (model number 440R-D23171) is a versatile safety relay designed to meet the demands of various industrial automation applications. Below are some potential pros and cons of purchasing this safety relay:

1. High Safety Integrity Level: This safety relay is designed to meet SIL 3 safety integrity level, ensuring a high level of safety in critical applications.

2. Wide Input Voltage Range: The 24VDC input voltage range is widely used in industrial automation applications, making it a popular choice for many industries.

3. Compact Design: The small size of this safety relay makes it easy to install in tight spaces, reducing the overall footprint of the control system.

4. Versatile Applications: The GuardMaster MSR125HP can be used in a variety of applications, including emergency stop, interlock, and machine safeguarding.

5. Built-in Diagnostics: The safety relay comes with built-in diagnostics, making it easier to identify and troubleshoot faults in the system.

1. Cost: The GuardMaster MSR125HP is a high-performance safety relay, and the cost may be higher than some other safety relays in the market.

2. Complex Configuration: The safety relay may require a more complex configuration process compared to simpler safety relays, which could add to the installation time and cost.

3. Limited Input and Output Channels: Compared to some other safety relays in the market, the GuardMaster MSR125HP has a limited number of input and output channels, which may not be suitable for larger or more complex applications.

In conclusion, the Allen-Bradley GuardMaster MSR125HP 24VDC Safety Relay (model number 440R-D23171) offers several advantages, including high safety integrity level, wide input voltage range, compact design, versatile applications, and built-in diagnostics. However, it may have some disadvantages, such as higher cost, complex configuration, and limited input and output channels.

Based on the information provided, I would recommend this safety relay for applications that require a high level of safety integrity, a wide input voltage range, a compact design, and versatility. However, if cost is a significant concern, or if the application requires a larger number of input and output channels, other safety relays in the market may be more suitable.

Details:

Design: Compact 22.5mm wide housing for DIN rail mounting. Performance: MSR125HP Series with 2 N.O. If you ever have any questions or are unsatisfied, for reason please let us know. Free Shipping.

Connection: Removable terminals for simplified wiring. VB Industrial Supply offers a huge selection of tools for every trade including new and used electrical, mechanical, hydraulic pneumatic industrial components supplies. Our listings include many detailed photos. NEW Allen-Bradley 440R-D23171 Guardmaster MSR125HP 24VDC Safety Relay: Type: Two-Hand Control Relay.

Quality Guarantee. Power: Operates on 24V DC. Fast Dispatch Service. Items are not returnable for condition issues commented on or shown in the pictures.

VB Industrial Supply takes great pride to honestly and accurately describe each item listed. Quick Delivery.

part #: 440rd23171 prices

• $102.99-$125.00

specifications aiactuato:

• brand: Allen-bradley
• mpn: 440r-d23171
• model: Msr125hp
• part type: Safety

seller aiactuato:

• city: Ventura, California
• # reviews: 20985
• rating: 99.7%

payments aiactuato:

• wallet: Google-pay
• other
• credit card: Visa

offer aiactuato:

• best offers: True
• availability: In Stock
• options: Ship-to-home
• quantity: 2
• started: September 16, 2025
• sold: 0

general aiactuato:

• Electrical Equipment Supplies > Relays > Control Machine Tool Relays
• condition: New Open box

returns aiactuato:

• paid by: Buyer
• method: Money back
• time: 60 Days
• policy: Returns Accepted

shipping aiactuato:

• type: Fixed
• cost: $0.00
• carrier: USPS
• service: USPS First Class, USPS Priority Mail Padded Flat Rate Envelope, USPS Priority Mail Express Flat Rate Envelope
• transit: 3-8 Days
• class: Standard, Expedited

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