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Allen-Bradley 440N-Z21SS2H
by Allen-Bradley
Read verified buyer reviews ↓OverviewElevate your equipment protection with the Allen-Bradley 440N-Z21SS2H SensaGuard Non-Contact Safety Switch. This advanced device combines RFID coding for tamper resistance with inductive sensing for precise position monitoring. Designed for demanding industrial environments, it offers resilience to misalignment, ensuring consistent performance. Its compact, rectangular plastic housing and a 25mm sensing distance make it suitable for various general-purpose safety interlock applications. Enhanced diagnostics and simple installation are supported by LED indicators and an integrated 6-inch pigtail with an 8-pin Micro (M12) connector. Featuring a standard code actuator, this model delivers a cost-effective and dependable solution for safeguarding personnel and machinery, improving uptime and efficiency.Key Features Non-Contact Sensing Technology: Employs inductive sensing to reduce mechanical wear, extending operational life and lowering maintenance. Robust RFID Coding: Integrates high-level RFID to prevent unauthorized interference, upholding the integrity of safety systems. Generous 25mm Assured Sensing Distance: Provides installation flexibility and tolerance for misalignment across diverse machine guard setups. Durable Rectangular Plastic Housing: Built for industrial use, protecting the sensor and actuator from operational stresses. Clear LED Status Indication: Offers immediate visual feedback on status and diagnostics, simplifying troubleshooting and operational oversight. Integrated 6-inch Pigtail with 8-Pin Micro (M12) Connector: Enables fast, secure, and accurate electrical connections, decreasing installation time. Standard Code Actuator: Optimized for broad application in general safety functions, ensuring wide compatibility and effortless integration. Technical Specifications Catalog Number: 440N-Z21SS2H Sensing Principle: RFID coding and inductive sensing Assured Sensing Distance: 25 mm (0.98 in.) Actuator Type: Rectangular Plastic Flat Pack, Standard Code Connection: 6-inch Pigtail with 8-Pin Micro (M12) Connector Housing Material: Plastic (Rectangular) Indication: LED for door status and diagnostics Applications Machine Guard Monitoring: Ideal for reliably tracking the position of safety gates, doors, and covers on various industrial equipment. Safety Interlock Systems: Essential for comprehensive safety interlocks to prevent machine operation when guards are open or incorrectly closed. Robotics and Automation Cells: Ensures personnel protection in automated settings by supervising access points and hazardous zones. Packaging and Material Handling Equipment: Provides critical safety functions on conveyor systems, presses, and other automated handling machinery. General Industrial Safety: A versatile option for a broad range of industrial uses requiring non-contact safety detection. Why ChooseThis model offers outstanding safety and reliability, combining RFID coding and inductive sensing for a highly secure solution that minimizes accident risks. Its non-contact operation significantly reduces mechanical wear, leading to fewer replacements and extended operational periods, thereby boosting productivity. With an M12 connector and 6-inch pigtail, integration and installation are straightforward, saving time and effort.Order NowSecure this vital safety component today from DD Parts Solution for immediate deployment.FAQWhat is the primary benefit of the RFID coding in this safety switch?The RFID coding provides robust tamper resistance, preventing unauthorized manipulation and ensuring the integrity of your safety systems.How does the 25mm assured sensing distance benefit industrial applications?A 25mm assured sensing distance offers flexible installation options and high tolerance to alignment variations, making it adaptable to diverse machine guard configurations.Can this switch be used in harsh industrial environments?Yes, its durable rectangular plastic housing is designed to withstand industrial conditions, protecting the sensor and actuator from operational stresses.
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Allen-Bradley 440N-Z21SS2H
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
- Catalog Number: 440N-Z21SS2H
- Sensing Principle: RFID coding and inductive sensing
- Assured Sensing Distance: 25 mm (0.98 in.)
- Actuator Type: Rectangular Plastic Flat Pack, Standard Code
- Connection: 6-inch Pigtail with 8-Pin Micro (M12) Connector
- Housing Material: Plastic (Rectangular)
- Indication: LED for door status and diagnostics
Applications
- Machine Guard Monitoring: Ideal for reliably tracking the position of safety gates, doors, and covers on various industrial equipment.
- Safety Interlock Systems: Essential for comprehensive safety interlocks to prevent machine operation when guards are open or incorrectly closed.
- Robotics and Automation Cells: Ensures personnel protection in automated settings by supervising access points and hazardous zones.
- Packaging and Material Handling Equipment: Provides critical safety functions on conveyor systems, presses, and other automated handling machinery.
- General Industrial Safety: A versatile option for a broad range of industrial uses requiring non-contact safety detection.
Why Choose the 440N-Z21SS2H?
This model offers outstanding safety and reliability, combining RFID coding and inductive sensing for a highly secure solution that minimizes accident risks. Its non-contact operation significantly reduces mechanical wear, leading to fewer replacements and extended operational periods, thereby boosting productivity. With an M12 connector and 6-inch pigtail, integration and installation are straightforward, saving time and effort.
Availability & Shipping
- ▸In stock: 440N-Z21SS2H 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 440N-Z21SS2H 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.
Related Allen-Bradley resources
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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.