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Allen-Bradley 440R-N23120
by Allen-Bradley
Read verified buyer reviews ↓OverviewThe Allen-Bradley 440R-N23120 MSR126.1R is an advanced, single-function safety relay designed for exceptional protection within demanding industrial environments. This high-performance device is meticulously crafted for critical safety monitoring tasks, including emergency stops and safety gate applications. Featuring resilient dual-channel operation, the MSR126.1R ensures fail-safe performance, providing a crucial layer of security for both machinery and personnel. With broad 24V AC/DC power compatibility, two normally open (N.O.) immediate safety outputs, and a carefully monitored manual reset function, this relay surpasses strict safety requirements for contemporary industrial automation. Its notably compact 22.5mm enclosure, complete with secure fixed terminals, enables seamless and highly efficient integration into control panels, optimizing space and simplifying installation.Key Features Redundant Safety Monitoring: Offers highly dependable safety supervision for critical applications through dual-channel architecture. Broad Power Compatibility: Utilizes a universal 24V AC/DC power supply for integration with various industrial control systems. Rapid Safety Outputs: Provides two N.O. immediate safety outputs for quick and secure system responses, reducing downtime. Controlled Reset Function: Features a monitored manual reset to guarantee a safe restart process after activation, preventing unexpected machine operations. Space-Saving Design: The compact 22.5mm form factor optimizes panel space for efficient installation in industrial enclosures. Durable Wiring: Fixed terminal connectivity ensures robust and secure wiring connections for long-term operational integrity. Global Safety Adherence: Constructed to meet and exceed international safety regulations, ensuring compliance and peace of mind. Technical Specifications Model: 440R-N23120 (MSR126.1R) Relay Category: Single Function Safety Relay Power Input: 24V AC/DC Inputs: Dual Channel Safety Outputs: 2 Normally Open (N.O.) Reset Mechanism: Monitored Manual Reset Enclosure Width: 22.5mm Terminal Type: Fixed Brand: Allen-Bradley Applications Emergency Stop Systems: Essential for monitoring emergency stop buttons and circuits to ensure immediate machine shutdown. Safety Gate Control: Securing access points and gates, ensuring machinery stops when guards are open. Industrial Machine Safeguarding: Enhancing the overall safety of manufacturing machinery and automated production lines. Process Control Compliance: Integrating safety functions into complex industrial processes to meet regulatory demands. Packaging and Material Handling: Safeguarding operations in automated packaging and material transport systems. Robotics and Automation: Providing critical safety interlocks for robotic work cells and automated equipment. Why Choose This Model?Unwavering ReliabilityThe dual-channel architecture and Allen-Bradley's reputation for quality ensure truly robust and dependable safety monitoring, reducing operational risks.Enhanced Safety ComplianceDesigned to meet demanding international safety standards, the MSR126.1R helps facilities achieve and maintain regulatory compliance, protecting personnel and equipment.Streamlined IntegrationIts compact 22.5mm housing and fixed terminals simplify installation and wiring, saving valuable panel space and reducing setup time.Versatile Power CompatibilityThe 24V AC/DC power input offers flexibility, making it suitable for integration into a wide range of existing industrial control systems.Controlled and Secure ResetsThe monitored manual reset function prevents accidental startups, providing an added layer of safety during machine recovery.Long-Term ValueBuilt with high-quality components by a trusted industry leader, this safety relay offers durability and a long operational lifespan, minimizing replacement costs.Order NowElevate your industrial safety standards today by integrating the Allen-Bradley 440R-N23120 safety relay into your operations.FAQWhat is the primary function of the Allen-Bradley 440R-N23120 MSR126.1R?Its primary function is to provide reliable safety monitoring for critical industrial applications such as emergency stops and safety gates, ensuring protection for both machinery and personnel.What type of power supply does this safety relay require?The 440R-N23120 MSR126.1R is compatible with a universal 24V AC/DC power supply, offering broad flexibility for integration into various industrial control systems.How many safety outputs does the unit have?The unit features two Normally Open (N.O.) immediate safety outputs, designed for rapid and secure system response.What reset mechanism does this model use?It utilizes a monitored manual reset function, which guarantees a controlled and safe restart process after a safety activation, preventing unintended machine startups.What are the benefits of its compact design?The compact 22.5mm housing allows for efficient integration into control panels, optimizing valuable space and simplifying installation in crowded industrial enclosures.
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Allen-Bradley 440R-N23120
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:
- Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- 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: 440R-N23120 (MSR126.1R)
- Relay Category: Single Function Safety Relay
- Power Input: 24V AC/DC
- Inputs: Dual Channel Safety
- Outputs: 2 Normally Open (N.O.)
- Reset Mechanism: Monitored Manual Reset
- Enclosure Width: 22.5mm
- Terminal Type: Fixed
- Brand: Allen-Bradley
Applications
- Emergency Stop Systems: Essential for monitoring emergency stop buttons and circuits to ensure immediate machine shutdown.
- Safety Gate Control: Securing access points and gates, ensuring machinery stops when guards are open.
- Industrial Machine Safeguarding: Enhancing the overall safety of manufacturing machinery and automated production lines.
- Process Control Compliance: Integrating safety functions into complex industrial processes to meet regulatory demands.
- Packaging and Material Handling: Safeguarding operations in automated packaging and material transport systems.
- Robotics and Automation: Providing critical safety interlocks for robotic work cells and automated equipment.
Why Choose the 440R-N23120?
Unwavering Reliability
The dual-channel architecture and Allen-Bradley's reputation for quality ensure truly robust and dependable safety monitoring, reducing operational risks.
Enhanced Safety Compliance
Designed to meet demanding international safety standards, the MSR126.1R helps facilities achieve and maintain regulatory compliance, protecting personnel and equipment.
Streamlined Integration
Its compact 22.5mm housing and fixed terminals simplify installation and wiring, saving valuable panel space and reducing setup time.
Versatile Power Compatibility
The 24V AC/DC power input offers flexibility, making it suitable for integration into a wide range of existing industrial control systems.
Controlled and Secure Resets
The monitored manual reset function prevents accidental startups, providing an added layer of safety during machine recovery.
Long-Term Value
Built with high-quality components by a trusted industry leader, this safety relay offers durability and a long operational lifespan, minimizing replacement costs.
Availability & Shipping
- ▸In stock: 440R-N23120 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-N23120 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Allen-Bradley
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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Independent Supplier Notice
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.