
*Image shown is a representation only. Actual product may vary.
Allen-Bradley 440N-Z21S16H
by Allen-Bradley
Read verified buyer reviews ↓OverviewThe Allen-Bradley 440N-Z21S16H is an advanced non-contact safety interlock switch crafted to elevate protection for both personnel and equipment across various industrial settings. As part of the respected Guardmaster series, this robust apparatus guarantees dependable hazard mitigation by preventing machinery operation when safety barriers are compromised. Its sophisticated design, incorporating contactless activation and thorough safety certifications, establishes it as an essential element for safeguarding vital operations, boosting output, and minimizing hazards in demanding environments.Engineered for longevity and peak performance, the 440N-Z21S16H merges hardy construction with intelligent attributes, delivering a trustworthy solution for high-demand uses. From its IP69K-rated enclosure, capable of enduring rigorous washdown conditions, to its adherence to premier safety benchmarks like SIL 3 and PLe, this interlock switch provides unparalleled defense and assurance.Key Features Non-Contact Operation: Eliminates mechanical wear and tear, ensuring extended operational longevity and consistent, dependable performance with reduced maintenance demands. Advanced Safety Standards: Complies with the highest international safety benchmarks, including Category 4 (EN 954-1), SIL 3 (IEC 61508), and Performance Level e (PL e) (EN ISO 13849-1), making it suitable for the most crucial safety-critical applications. Robust Environmental Resistance (IP69K): Features a highly durable IP69K-rated polymer housing, offering superior defense against dust intrusion, high-pressure water jets, and corrosive cleaning agents, ideal for challenging industrial settings. Compact and Adaptable Form Factor: Its optimized dimensions and adjustable mounting options permit flexible installation in tight spaces, simplifying integration into existing or new machinery. Swift and Secure M12 Connection: Equipped with an efficient M12 8-pin connector, facilitating rapid, secure, and reliable electrical connections, minimizing installation time and potential wiring errors. Generous Operating Temperature Range: Functions reliably across a broad temperature spectrum from -10°C to +55°C (14°F to 131°F), ensuring consistent performance in diverse climates. Technical Specifications Model Number: 440N-Z21S16H Series: Guardmaster Switch Type: Safety Interlock Switch Actuation Method: Non-Contact Connection Type: M12 8-pin connector Safety Ratings: Category 4 (EN 954-1), SIL 3 (IEC 61508), Performance Level (PL) e (EN ISO 13849-1) Operating Voltage: 24V DC Switching Current: Max 200 mA Housing Material: Durable Polymer Operating Temperature: -10°C to +55°C (14°F to 131°F) Ingress Protection: IP69K Actuator: Included Mounting: Adjustable Configuration Applications Industrial Automation & Robotics: Essential for safeguarding operators from the hazards of high-speed machinery and robotic systems by ensuring controlled access. Food and Beverage Processing: Its IP69K rating makes it perfect for environments demanding strict hygiene, frequent cleaning cycles, and resistance to harsh sanitizers. Packaging & Material Handling: Prevents unauthorized entry to high-speed conveyor systems, packaging equipment, and other automated material handling machinery, protecting personnel. Pharmaceutical Manufacturing: Ensures sterile and secure operations within pharmaceutical production lines, where precision and contamination control are critical. Automotive Manufacturing: Boosts safety protocols in assembly lines, welding cells, and other vital zones susceptible to machinery-related incidents. Woodworking and Metalworking: Protects workers from moving blades, presses, and other dangerous components in heavy-duty machinery. Why Choose?Unmatched Dependability: Engineered by Allen-Bradley, a leader in industrial automation, guaranteeing consistent and enduring performance in demanding safety applications.Order NowReady to enhance your operational safety? Contact Palm Parts Solution today to order the Allen-Bradley 440N-Z21S16H and integrate this superior safety interlock switch into your systems. Our experts are available to assist you with selection and technical support, ensuring a seamless implementation for your specific industrial needs.FAQWhat makes the 440N-Z21S16H suitable for harsh environments?Its IP69K rating signifies exceptional resistance to dust and high-pressure, high-temperature washdowns, making it ideal for the most demanding industrial settings.What safety standards does this switch meet?The 440N-Z21S16H adheres to top global safety standards, including Category 4 (EN 954-1), SIL 3 (IEC 61508), and Performance Level e (PL e) (EN ISO 13849-1).
USA — Free FedEx Priority & UPS Ground · Worldwide shipping available
For more quantity please contact Customer Service
Fast Shipping
Dispatched quickly on in-stock items via UPS, FedEx & DHL worldwide.
Availability
Thousands of parts in stock — ready for immediate dispatch from Florida.
Payment Flexibility
AMEX, Visa, MasterCard, PayPal, Discover and wire transfer accepted.
Allen-Bradley 440N-Z21S16H
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 Number: 440N-Z21S16H
- Series: Guardmaster
- Switch Type: Safety Interlock Switch
- Actuation Method: Non-Contact
- Connection Type: M12 8-pin connector
- Safety Ratings: Category 4 (EN 954-1), SIL 3 (IEC 61508), Performance Level (PL) e (EN ISO 13849-1)
- Operating Voltage: 24V DC
- Switching Current: Max 200 mA
- Housing Material: Durable Polymer
- Operating Temperature: -10°C to +55°C (14°F to 131°F)
- Ingress Protection: IP69K
- Actuator: Included
- Mounting: Adjustable Configuration
Applications
- Industrial Automation & Robotics: Essential for safeguarding operators from the hazards of high-speed machinery and robotic systems by ensuring controlled access.
- Food and Beverage Processing: Its IP69K rating makes it perfect for environments demanding strict hygiene, frequent cleaning cycles, and resistance to harsh sanitizers.
- Packaging & Material Handling: Prevents unauthorized entry to high-speed conveyor systems, packaging equipment, and other automated material handling machinery, protecting personnel.
- Pharmaceutical Manufacturing: Ensures sterile and secure operations within pharmaceutical production lines, where precision and contamination control are critical.
- Automotive Manufacturing: Boosts safety protocols in assembly lines, welding cells, and other vital zones susceptible to machinery-related incidents.
- Woodworking and Metalworking: Protects workers from moving blades, presses, and other dangerous components in heavy-duty machinery.
Why Choose the 440N-Z21S16H?
Unmatched Dependability: Engineered by Allen-Bradley, a leader in industrial automation, guaranteeing consistent and enduring performance in demanding safety applications.
Availability & Shipping
- ▸In stock: 440N-Z21S16H 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-Z21S16H 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
What Verified Buyers Say
No reviews yet for this product. Be the first verified buyer to share your experience — we email a review invitation after every purchase.
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.