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Allen-Bradley 440R-N23135 MSR127RP Monitoring Safety Relay

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Allen-Bradley 440R-N23135

by Allen-Bradley

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OverviewThe Allen-Bradley 440R-N23135 MSR127RP Monitoring Safety Relay is a vital component for advanced industrial automation, designed to meet rigorous safety benchmarks. This sturdy device guarantees operational integrity by offering dependable monitoring and control in environments where safety is paramount. Functioning efficiently with a versatile 24V AC/DC power input, it provides outstanding adaptability for integration into diverse electrical frameworks. Featuring three normally open (N.O.) immediate safety outputs and one normally closed (N.C.) auxiliary output, the 440R-N23135 MSR127RP enables comprehensive command over essential safety functions and secondary monitoring tasks. Its design incorporates a supervised manual reset, a critical element that bolsters adherence to strict safety regulations by mandating intentional operator engagement. The convenience of removable terminals streamlines wiring and maintenance, leading to reduced downtime and greater operational effectiveness. Housed in a compact 22.5mm enclosure, this relay is optimized for efficient use of panel space, making it an excellent choice for contemporary industrial setups where space is often limited.Key Features Dependable Safety Management: Equipped with three N.O. immediate safety outputs to ensure quick and reliable command of critical safety operations, protecting both personnel and machinery. Flexible Auxiliary Oversight: Includes one N.C. auxiliary output, providing additional monitoring capabilities for non-safety-critical signals within your system. Space-Efficient Design: The ultra-slim 22.5mm width allows for seamless integration into crowded control panels, maximizing valuable enclosure space. Improved Safety Conformance: Features a monitored manual reset, which requires operator input for system restart, thereby ensuring adherence to rigorous safety standards and protocols. Simplified Setup & Upkeep: Removable terminals significantly streamline the wiring process and facilitate rapid component replacement, minimizing downtime and labor costs. Broad Power Compatibility: Engineered to operate effectively with a 24V AC/DC power supply, offering extensive compatibility with various industrial power infrastructures. DIN Rail Mounting: Designed for effortless DIN rail installation, ensuring secure and straightforward integration into existing control panel layouts. Technical Specifications Model: Allen-Bradley 440R-N23135 MSR127RP Series: Guardmaster 440R Power Supply: 24V AC/DC Safety Outputs: 3 x Normally Open (N.O.) Immediate Safety Outputs Auxiliary Output: 1 x Normally Closed (N.C.) Auxiliary Output Reset Type: Monitored Manual Reset Case Dimensions: 22.5mm (Width) Mounting: DIN Rail Terminals: Removable Operating Temperature: Refer to datasheet for specific range Certifications: Compliant with relevant safety standards (e.g., CE, UL, cUL) Applications Industrial Machine Safety Systems: Crucial for overseeing emergency stop circuits, light curtains, safety gates, and other protective mechanisms in automated equipment. Operator Protection Measures: Implements controlled shutdowns and ensures safe restart procedures to safeguard individuals in hazardous work environments. Robotics and Automation Integration: Seamlessly integrates into complex robotic cells and automated production lines to manage safety interlocks and critical safety functions. Process Control Environments: Enhances the safety of various industrial processes by providing reliable monitoring and supervision of safety-related inputs and outputs. Conveyor System Safety: Ensures the secure operation of conveyor belts through monitoring emergency stops and pull-cord switches. Why ChooseUnwavering Reliability: As part of the respected Allen-Bradley Guardmaster series, the 440R-N23135 MSR127RP delivers proven durability and consistent performance in demanding industrial environments.Order NowEnhance your industrial safety protocols today. Place your order for the Allen-Bradley 440R-N23135 MSR127RP Monitoring Safety Relay and ensure superior protection for your operations.FAQWhat is the primary function of the Allen-Bradley 440R-N23135?It is a safety relay designed to monitor and control critical safety functions in industrial automation systems, ensuring compliance with safety standards.What type of power supply does this safety relay require?The 440R-N23135 operates efficiently on a 24V AC/DC power supply, offering broad compatibility.How many safety outputs does the MSR127RP have?It features three normally open (N.O.) immediate safety outputs for dependable control.Does this relay include an auxiliary output?Yes, it includes one normally closed (N.C.) auxiliary output for additional monitoring capabilities.What is the benefit of the monitored manual reset feature?The monitored manual reset requires deliberate operator intervention for system restarts, enhancing safety compliance and preventing unintended startups.Is the 440R-N23135 space-efficient?Yes, with a compact 22.5mm width, it is optimized for efficient panel space utilization in modern industrial setups.Are the terminals on this relay removable?Yes, it features removable terminals to simplify wiring, streamline maintenance, and reduce downtime.Can this safety relay be used with DIN rail mounting?Yes, it is designed for easy DIN rail mounting, allowing for secure and straightforward integration into existing control panel layouts.

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PRODUCT DETAILS

Allen-Bradley 440R-N23135

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: Allen-Bradley 440R-N23135 MSR127RP
  • Series: Guardmaster 440R
  • Power Supply: 24V AC/DC
  • Safety Outputs: 3 x Normally Open (N.O.) Immediate Safety Outputs
  • Auxiliary Output: 1 x Normally Closed (N.C.) Auxiliary Output
  • Reset Type: Monitored Manual Reset
  • Case Dimensions: 22.5mm (Width)
  • Mounting: DIN Rail
  • Terminals: Removable
  • Operating Temperature: Refer to datasheet for specific range
  • Certifications: Compliant with relevant safety standards (e.g., CE, UL, cUL)

Applications

  • Industrial Machine Safety Systems: Crucial for overseeing emergency stop circuits, light curtains, safety gates, and other protective mechanisms in automated equipment.
  • Operator Protection Measures: Implements controlled shutdowns and ensures safe restart procedures to safeguard individuals in hazardous work environments.
  • Robotics and Automation Integration: Seamlessly integrates into complex robotic cells and automated production lines to manage safety interlocks and critical safety functions.
  • Process Control Environments: Enhances the safety of various industrial processes by providing reliable monitoring and supervision of safety-related inputs and outputs.
  • Conveyor System Safety: Ensures the secure operation of conveyor belts through monitoring emergency stops and pull-cord switches.

Why Choose the 440R-N23135?

Unwavering Reliability: As part of the respected Allen-Bradley Guardmaster series, the 440R-N23135 MSR127RP delivers proven durability and consistent performance in demanding industrial environments.

Availability & Shipping

  • In stock: 440R-N23135 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-N23135 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Allen-Bradley

It is a safety relay designed to monitor and control critical safety functions in industrial automation systems, ensuring compliance with safety standards.

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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