{"product_id":"rockwell-440n-z21ss2hn-non-contact-safety-interlock-switch-ip69k-cat-4","title":"Rockwell 440N-Z21SS2HN Non-Contact Safety Interlock Switch | IP69K Cat 4","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley 440N-Z21SS2HN\u003c\/strong\u003e is an advanced non-contact safety interlock switch from the \u003cstrong style=\"color: #0056b3;\"\u003eGuardmaster SensaGuard\u003c\/strong\u003e series by \u003cstrong style=\"color: #0056b3;\"\u003eRockwell Automation\u003c\/strong\u003e. Engineered for heavy-duty industrial environments, this device utilizes RFID technology to provide reliable machine safeguarding. It detects guard closure without mechanical wear, making it ideal for high-hygiene and washdown applications.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003e\u003cstrong\u003eSpecification Category\u003c\/strong\u003e\u003c\/th\u003e\n      \u003cth\u003e\u003cstrong\u003eTechnical Parameters \u0026amp; Ratings\u003c\/strong\u003e\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eBrand \u0026amp; Model\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e\n\u003cstrong style=\"color: #0056b3;\"\u003eRockwell Automation Allen-Bradley 440N-Z21SS2HN\u003c\/strong\u003e (\u003cstrong style=\"color: #0056b3;\"\u003eSensaGuard\u003c\/strong\u003e Series)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSensing Range\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eAssured ON: 15 mm (0.59 in.); Assured OFF: 25 mm (0.98 in.)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eElectrical Outputs\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e2 N.C. solid-state safety outputs (OSSD); 1 N.O. auxiliary output\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e24V DC (10% \/ -15% Class 2 SELV or PELV power supply)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eResponse Time\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e45 ms maximum (Off state)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSwitching Frequency\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e0.25 Hz maximum operating cycle frequency\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eCurrent \u0026amp; Load Ratings\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eLoad current: 200 mA max; No-load supply current: \u0026lt; 50 mA; Voltage drop: \u0026lt; 1.5V\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eEnvironmental Protection\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eIP66, IP67, and IP69K washdown resistant; Pollution Degree 3 (IEC 60947-1)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eTemperature \u0026amp; Humidity\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e-25°C to +70°C (-13°F to +158°F); 5% to 95% relative humidity\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eShock \u0026amp; Vibration\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eShock: 30 g, 11 ms (IEC 60068-2-27); Vibration: 10–55 Hz (IEC 60068-2-6)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eEMC \u0026amp; Immunity\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eCompliant with IEC 61326-1 and IEC 61000-6-7 (8 kV ESD, 20V\/m radiated immunity)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eCircuit Protection\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eShort circuit, overload, reverse polarity, overvoltage, and loss of ground\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cstrong\u003eInstallation Guidelines\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMount the \u003cstrong style=\"color: #0056b3;\"\u003e440N-Z21SS2HN\u003c\/strong\u003e sensor and standard code actuator on rigid, non-ferrous frames to prevent alignment shifts.\u003c\/li\u003e\n  \u003cli\u003eMaintain a target operating gap within the assured sensing distance of 15 mm to ensure stable OSSD outputs.\u003c\/li\u003e\n  \u003cli\u003eTorque mounting hardware securely to withstand heavy industrial vibration up to 30 g.\u003c\/li\u003e\n  \u003cli\u003eConnect the 6-inch pigtail with an 8-pin Micro (M12) connector directly to a 24V DC Class 2 SELV source.\u003c\/li\u003e\n  \u003cli\u003eVerify proper ground connection to protect against electrical surges and electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCommissioning \u0026amp; Maintenance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMonitor the integrated LED indicator for real-time door status and margin diagnostic feedback.\u003c\/li\u003e\n  \u003cli\u003eTest the OSSD outputs periodically to confirm safe-state de-energization during simulated guard openings.\u003c\/li\u003e\n  \u003cli\u003eInspect the polycarbonate housing regularly for residue buildup or mechanical damage in harsh washdown zones.\u003c\/li\u003e\n  \u003cli\u003eClean the sensor face with standard industrial detergents compatible with IP69K ratings.\u003c\/li\u003e\n  \u003cli\u003eVerify that supply voltage remains within the stable operational window without excessive voltage drop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCompatibility \u0026amp; System Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIntegrates seamlessly with standard safety relays, safety PLCs, and safety input modules.\u003c\/li\u003e\n  \u003cli\u003eSupports unlimited series connection of multiple \u003cstrong style=\"color: #0056b3;\"\u003e440N-Z21SS2HN\u003c\/strong\u003e switches without losing safety category ratings.\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard 8-pin Micro (M12) industrial cordsets for rapid plug-and-play field replacement.\u003c\/li\u003e\n  \u003cli\u003eOperates efficiently within standard 24V DC industrial control architectures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eSafety Certifications \u0026amp; Standards\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Ratings:\u003c\/strong\u003e Cat. 4, PLe per ISO 13849-1, Type 4 interlocking device per IEC 60947-5-3, SIL CL 3 per IEC 62061.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesign Standards:\u003c\/strong\u003e IEC 60947-1, IEC 60947-5-3, and IEC 61508.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUtilization Category:\u003c\/strong\u003e DC-12 and DC-13 (24V, 200 mA).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOne \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley 440N-Z21SS2HN\u003c\/strong\u003e non-contact safety switch unit.\u003c\/li\u003e\n  \u003cli\u003eOne matching standard code actuator.\u003c\/li\u003e\n  \u003cli\u003eTechnical installation sheet and regulatory compliance documentation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What makes the \u003cspan style=\"color: #0056b3;\"\u003e440N-Z21SS2HN\u003c\/span\u003e suitable for food and beverage washdown areas?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The unit features an IP69K environmental rating and robust polycarbonate housing that withstands high-pressure, high-temperature chemical washdowns.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I wire multiple \u003cspan style=\"color: #0056b3;\"\u003eSensaGuard\u003c\/span\u003e switches in series?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, you can connect unlimited switches in series while maintaining high safety integrity levels, provided you follow the designated timing diagrams.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What causes the diagnostic LED to indicate a low margin?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Misalignment or excessive distance between the sensor and actuator typically triggers margin warnings, requiring physical readjustment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I troubleshoot an unexpected lockout or safe-state trigger?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Check the 24V DC power supply stability, verify secure M12 connector seating, and inspect the sensing gap against the 15 mm assured operating threshold.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does metal mounting affect the sensing range of this switch?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Mounting directly on ferrous metal can reduce the assured sensing distance, so always install non-magnetic spacers when required.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eSelection \u0026amp; Buying Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify your machine safety circuit requires Category 4 \/ PLe compliance before finalizing your selection.\u003c\/li\u003e\n  \u003cli\u003eEnsure your control panel supplies a clean 24V DC SELV\/PELV power source.\u003c\/li\u003e\n  \u003cli\u003eChoose the \u003cstrong style=\"color: #0056b3;\"\u003e440N-Z21SS2HN\u003c\/strong\u003e when your application demands non-contact RFID sensing to eliminate mechanical wear in high-cycle doors.\u003c\/li\u003e\n  \u003cli\u003eConfirm cable length requirements and select compatible 8-pin M12 patch cords for seamless wiring.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":68047947038902,"sku":"440N-Z21SS2HN","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/440N-Z21SS2HN-1.jpg?v=1794465102","url":"https:\/\/www.plcsparehub.com\/products\/rockwell-440n-z21ss2hn-non-contact-safety-interlock-switch-ip69k-cat-4","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}