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Allen-Bradley 440R-N23117 MSR127T Safety Relay for industrial automation

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Allen-Bradley 440R-N23117

by Allen-Bradley

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OverviewThe Allen-Bradley 440R-N23117 MSR127T Safety Relay is a crucial component for contemporary industrial safety setups, meticulously engineered to provide exceptional reliability and adherence to standards. This compact yet powerful safety relay readily integrates with various safety devices, including emergency stops, interlock switches, and safety mats, offering robust protection within demanding industrial settings. Its advanced dual-channel input capability ensures redundancy and fault detection, significantly elevating overall system safety and operational integrity. Operating on a 24V DC supply and boasting a rapid response time of under 20 milliseconds, the 440R-N23117 is designed for quick action during critical safety events, thereby minimizing risk and maximizing efficiency. Certifications such as CE, cULus, and TÜV validate its compliance with rigorous global safety standards, making it a reliable solution for machine safety and automation needs.Crafted for adaptability, the 440R-N23117 MSR127T features a space-saving DIN rail mount design, optimizing control panel space without sacrificing performance. Its durable construction guarantees long-term resilience and consistent operation, which is vital for continuous industrial processes. This safety relay not only fulfills but surpasses the requirements for SIL 3 and PLe standards, providing comprehensive safety monitoring even for the most intricate machinery. Opting for the Allen-Bradley 440R-N23117 means investing in a proven solution that will safeguard personnel, protect valuable equipment, and enhance operational uptime.Key Features Advanced Dual-Channel Inputs: Delivers superior redundancy and fault detection for uncompromised safety monitoring in critical applications. Rapid Response Time: Guarantees swift activation within 20 milliseconds, providing immediate protection during safety events to minimize risks. Compact & Space-Saving Design: Optimizes control panel layouts with its compact dimensions (90 mm x 22.5 mm x 120 mm) and DIN rail mounting. Comprehensive Safety Certifications: UL Listed, CE, and TÜV approved, affirming global compliance and reliability for diverse industrial settings. Versatile Device Compatibility: Seamlessly integrates with emergency stops, interlock switches, light curtains, and safety mats for broad application flexibility. Enhanced Safety Monitoring: Provides reliable monitoring aligned with SIL 3 and PLe standards, ensuring the highest level of protection for personnel and machinery. Robust Industrial Durability: Engineered for resilience in harsh industrial environments, ensuring long-term performance and minimal maintenance. Technical Specifications Model Number: 440R-N23117 Relay Type: Safety Relay Inputs: Dual-channel inputs for redundancy and enhanced safety Output Contacts: 2 Normally Open (NO) + 1 Normally Closed (NC) safety outputs Supply Voltage: 24V DC Response Time: ≤20 ms Mounting: DIN rail Dimensions: Compact design (90 mm x 22.5 mm x 120 mm) Certifications: CE, cULus, TÜV approved Applications Machine Safety Systems: Integral for integrating and monitoring emergency stop buttons, safety gates, and light curtains in manufacturing lines. Industrial Automation & Robotics: Ensures compliant and safe operation of robotic cells and automated machinery, protecting operators from hazardous movements. Process Control Environments: Ideal for safeguarding processes where immediate shutdown or intervention is required due to detected safety infringements. Access Control for Hazardous Areas: Provides reliable safety monitoring for guard doors, interlock switches, and protective barriers around dangerous machinery. Packaging & Material Handling: Essential for maintaining safety protocols on conveyor systems, assembly lines, and automated warehousing solutions. Power Generation & Energy: Implements safety functions in control panels for power distribution, renewable energy systems, and critical infrastructure. Why Choose?This Allen-Bradley safety relay is an excellent selection for industries prioritizing personnel protection and equipment longevity. Its adherence to stringent international safety standards, combined with its robust construction and versatile compatibility, makes it a prime choice. By integrating this relay, businesses can significantly enhance their operational safety, reduce potential hazards, and achieve compliance with critical industrial regulations, all while maintaining high efficiency.Order NowSecure the highest level of safety for your industrial operations. Add the Allen-Bradley 440R-N23117 MSR127T Safety Relay to your system today and experience unparalleled protection and reliability.FAQHow does the dual-channel input enhance safety?The dual-channel input provides redundancy, meaning two separate paths monitor the safety function. If one path fails, the other can still detect a hazard, significantly reducing the chance of undetected faults and enhancing overall system integrity.What does a response time of ≤20 ms mean for my operations?A response time of 20 milliseconds or less signifies that the safety relay reacts extremely quickly to a detected safety event. This rapid response minimizes the time exposed to hazards, crucial for preventing accidents and ensuring immediate protection of personnel and machinery.Is this safety relay difficult to install?No, the 440R-N23117 MSR127T features a DIN rail mount design, which is a standard and straightforward method for installing industrial control components. This design allows for efficient use of space and simplifies the installation process for quick setup.

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PRODUCT DETAILS

Allen-Bradley 440R-N23117

Overview

This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Allen-Bradley catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Allen-Bradley automation ecosystem

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Allen-Bradley platform with documented conversion notes

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Model Number: 440R-N23117
  • Relay Type: Safety Relay
  • Inputs: Dual-channel inputs for redundancy and enhanced safety
  • Output Contacts: 2 Normally Open (NO) + 1 Normally Closed (NC) safety outputs
  • Supply Voltage: 24V DC
  • Response Time: ≤20 ms
  • Mounting: DIN rail
  • Dimensions: Compact design (90 mm x 22.5 mm x 120 mm)
  • Certifications: CE, cULus, TÜV approved

Applications

  • Machine Safety Systems: Integral for integrating and monitoring emergency stop buttons, safety gates, and light curtains in manufacturing lines.
  • Industrial Automation & Robotics: Ensures compliant and safe operation of robotic cells and automated machinery, protecting operators from hazardous movements.
  • Process Control Environments: Ideal for safeguarding processes where immediate shutdown or intervention is required due to detected safety infringements.
  • Access Control for Hazardous Areas: Provides reliable safety monitoring for guard doors, interlock switches, and protective barriers around dangerous machinery.
  • Packaging & Material Handling: Essential for maintaining safety protocols on conveyor systems, assembly lines, and automated warehousing solutions.
  • Power Generation & Energy: Implements safety functions in control panels for power distribution, renewable energy systems, and critical infrastructure.

Why Choose the 440R-N23117?

This Allen-Bradley safety relay is an excellent selection for industries prioritizing personnel protection and equipment longevity. Its adherence to stringent international safety standards, combined with its robust construction and versatile compatibility, makes it a prime choice. By integrating this relay, businesses can significantly enhance their operational safety, reduce potential hazards, and achieve compliance with critical industrial regulations, all while maintaining high efficiency.

Availability & Shipping

  • In stock: 440R-N23117 ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 440R-N23117 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Allen-Bradley

The dual-channel input provides redundancy, meaning two separate paths monitor the safety function. If one path fails, the other can still detect a hazard, significantly reducing the chance of undetected faults and enhancing overall system integrity.

Machine down? We ship parts the same day.

New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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