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  3. ALLEN BRADLEY MSR138

ALLEN-BRADLEY Guardmaster Saftey Relay MSR138. 1DP

Msr138 Allen-bradley Msr138. 1dp Guardmaster Saftey Relay

( Brand: Allen-bradley ), ( Model: MSR138. 1DP ), ( Manufacturer Part Number: MSR138. )

Review ALLEN BRADLEY Msr138. 1dp Guardmaster Saftey Relay

The Allen-Bradley Model MSR138 1DP GuardMaster Safety Relay is a versatile and reliable safety component designed to protect machinery and equipment from hazardous conditions. This safety relay is part of Rockwell Automation's GuardMaster family, which is known for its advanced safety functions and innovative design.

The MSR138 is a 1-pole, 2-contact, normally open (NO) safety relay. It is designed to handle currents up to 10 Amperes and voltages up to 240 Volts AC. This safety relay is ideal for applications where safety functions need to be integrated with process control functions.

One of the key features of the MSR138 is its built-in diagnostic capabilities. It provides real-time status information on the safety functions it is responsible for, enabling users to quickly identify and troubleshoot faults. The relay also includes a self-diagnostic function, which checks the internal components of the relay for faults and reports any issues.

The MSR138 is also designed for easy integration into control systems. It has a compact size and a modular design, which makes it easy to install and connect to other components. The relay comes with a variety of mounting options, including DIN rail, panel mount, and surface mount, making it flexible for use in different applications.

Another important feature of the MSR138 is its high degree of safety. It conforms to the IEC 61508 functional safety standard, SIL 3, and EN 61850-2-10 safety standards. This means that it is designed to provide a high level of safety for safety-critical applications.

The MSR138 also includes a number of advanced safety functions, such as redundancy, fail-safe functions, and diagnostic functions. These features help to ensure that safety functions are always available, even in the event of a fault or failure.

In summary, the Allen-Bradley Model MSR138 1DP GuardMaster Safety Relay is a versatile and reliable safety component that is ideal for applications where safety functions need to be integrated with process control functions. It is designed for easy integration into control systems, has built-in diagnostic capabilities, and conforms to the highest safety standards. With its advanced safety functions and innovative design, the MSR138 is an essential component for any safety-critical application.

The Allen-Bradley Model MSR138 1DP GuardMaster Safety Relay is a versatile safety relay designed to meet the needs of various applications in machinery automation. This relay is known for its functional safety, ease of use, and compatibility with various safety applications. Here are some pros and cons of buying this safety relay:

Pros:

1. Functional Safety: The MSR138 1DP GuardMaster Safety Relay complies with international functional safety standards such as IEC 61508, SIL 3, and Category 4. This makes it an ideal choice for safety applications that require high levels of reliability and safety.

2. Ease of Use: The safety relay comes with a user-friendly interface and is easy to program using the Rockwell Automation RSLogix 5000 or RSLogix 5000 Safety Design Software. This saves time and reduces the need for extensive training for operators.

3. Compatibility: The MSR138 1DP GuardMaster Safety Relay is compatible with various safety applications, including emergency stop, interlock, and safety monitoring. It can also be used with various safety devices such as safety switches, safety contactors, and safety solenoids.

4. Diagnostic Capabilities: The safety relay offers diagnostic capabilities that help identify faults and troubleshoot issues quickly. This minimizes downtime and reduces maintenance costs.

5. Durability: The MSR138 1DP GuardMaster Safety Relay is designed to withstand harsh industrial environments, including high temperatures, humidity, and vibration.

Cons:

1. Cost: The Allen-Bradley MSR138 1DP GuardMaster Safety Relay is more expensive than some other safety relays in the market. This may make it less affordable for small businesses or budget-conscious customers.

2. Complexity: The safety relay may be too complex for simple safety applications. It may require extensive training and expertise to program and operate effectively.

3. Size: The MSR138 1DP GuardMaster Safety Relay is larger than some other safety relays, which may make it less suitable for applications with limited space.

Conclusion:

The Allen-Bradley Model MSR138 1DP GuardMaster Safety Relay is a high-performing and reliable safety relay that offers functional safety, ease of use, compatibility, diagnostic capabilities, and durability. However, it comes with a higher cost, complexity, and size compared to some other safety relays. If your safety application requires high levels of reliability and safety, the MSR138 1DP GuardMaster Safety Relay is an excellent choice. However, if you have a limited budget or a simple safety application, you may want to consider other options.

Recommendation:

Based on the pros and cons, I would recommend the Allen-Bradley Model MSR138 1DP GuardMaster Safety Relay for safety applications that require high levels of reliability and safety, such as those in machinery automation. It offers functional safety, ease of use, compatibility, diagnostic capabilities, and durability. However, if you have a limited budget or a simple safety application, you may want to consider other options that offer similar features but at a lower cost.

Details:

Unit comes with no other accessories. Unit is untested. 1DP GuardMaster Saftey Relay,: Allen-Bradley MSR138. Domestic/USA shipping via FedEx or UPS.

1DP GuardMaster Saftey Relay, condition: As-Is, Unit is in good cosmetic condition. BRAND Allen-Bradley, MPNMSR138. 1DP GuardMaster Saftey Relay, model MSR138.

part #: msr138 prices

  • $187.20-$199.00

specifications acdrivestream:

  • brand: Allen-bradley
  • model#: MSR138. 1DP
  • manufacturer part number: MSR138.

offer acdrivestream:

  • availability: In Stock
  • sold: 0
  • started: November 21, 2025
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category: business & industrial > drives starters > drives motor controls > general purpose ac drives, sku: 4509595134484762,

Allen-bradley MSR138 Is Similar To:

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5 offers $187.20–$199.00 USD
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  • New – Open box. Offer #3 priced at $187.20 + $18.15 delivery = $205.35* total. Allen Bradley DP (440R-M21351) Brand New Tested Surplus.+$18.15 shipping
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  • New. Offer #5 priced at $161.99 + $9.00 delivery = $170.99* total. As a safety relay from a trusted brand like Allen-Bradley, this product is designed to ensure the safety and reliability of electrical systems in various industrial settings The Allen-Bradley Guardmaster DP 440R-M23141 Ser.+$9.00 shipping

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