{"product_id":"allen-bradley-440n-g02149-guardmaster-non-contact-safety-switch","title":"Allen-Bradley 440N-G02149 Guardmaster Non-Contact Safety Switch","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley 440N-G02149\u003c\/strong\u003e is a heavy-duty non-contact safety interlock switch from the \u003cstrong style=\"color: #d9534f;\"\u003eGuardmaster Ferrogard FRS21 GD2\u003c\/strong\u003e series. \u003cstrong style=\"color: #0056b3;\"\u003eRockwell Automation\u003c\/strong\u003e engineers this magnetic switch to monitor guard doors and machine access points reliably.\u003c\/p\u003e\n\u003cp\u003eUnlike mechanical switches, this non-contact unit eliminates physical wear and extends operational service life. Its rugged stainless steel rectangular body withstands washdowns, thermal extremes, and mechanical shock in harsh factory environments.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eSeries Architecture \u0026amp; Engineering Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #d9534f;\"\u003eGuardmaster 440N Ferrogard\u003c\/strong\u003e platform combines reed switch simplicity with high-tolerance magnetic actuation. Engineers deploy the \u003cstrong style=\"color: #d9534f;\"\u003eFRS21 GD2\u003c\/strong\u003e architecture where hygiene, temperature resilience, and misalignment tolerance are critical.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Temperature Magnetic Sensing:\u003c\/strong\u003e Operates reliably up to \u003cstrong\u003e125 °C\u003c\/strong\u003e, outperforming standard plastic-bodied safety switches.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenerous Misalignment Tolerance:\u003c\/strong\u003e Maintains a \u003cstrong\u003e15 mm\u003c\/strong\u003e sensing range to accommodate door sag and machine vibration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Channel Contact Logic:\u003c\/strong\u003e Integrates dual Normally Closed (NC) safety contacts with one Normally Open (NO) auxiliary signaling contact.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSealed Stainless Steel Enclosure:\u003c\/strong\u003e Achieves full \u003cstrong\u003eIP68\u003c\/strong\u003e ingress protection for direct exposure to pressurized water and dust.\u003c\/li\u003e\n\u003c\/ul\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\u003eParameter Category\u003c\/th\u003e\n      \u003cth\u003eTechnical Attribute\u003c\/th\u003e\n      \u003cth\u003eSpecification Value\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eIdentification\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eManufacturer \/ Brand\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley (Rockwell Automation)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eIdentification\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003ePart Number \/ Model\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong style=\"color: #0056b3;\"\u003e440N-G02149\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eIdentification\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eProduct Series\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong style=\"color: #d9534f;\"\u003eGuardmaster Ferrogard FRS21 GD2 (440N)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eIdentification\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eUPC \/ Lifecycle Status\u003c\/td\u003e\n      \u003ctd\u003e611320677560 \/ \u003cstrong\u003eActive\u003c\/strong\u003e\n\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSensing \u0026amp; Response\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eActuation Principle\u003c\/td\u003e\n      \u003ctd\u003eMagnetic Non-Contact (Standard Actuator Included)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSensing \u0026amp; Response\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eAssured Sensing Distance\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong\u003e15 mm\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSensing \u0026amp; Response\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eLinearity \u0026amp; Resolution\u003c\/td\u003e\n      \u003ctd\u003eDiscrete Binary Switching (On\/Off Hysteresis Band)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSensing \u0026amp; Response\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eFrequency Response (Vibration)\u003c\/td\u003e\n      \u003ctd\u003eUp to \u003cstrong\u003e200 Hz\u003c\/strong\u003e\n\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eElectrical Ratings\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eNominal Operating Voltage\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong\u003e24 VDC\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eElectrical Ratings\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eMax Switching Current\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong\u003e1 A\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eElectrical Ratings\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eContact Configuration\u003c\/td\u003e\n      \u003ctd\u003e\n\u003cstrong\u003e2 N.C.\u003c\/strong\u003e (Safety) + \u003cstrong\u003e1 N.O.\u003c\/strong\u003e (Auxiliary)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eElectrical Ratings\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eConnection Interface\u003c\/td\u003e\n      \u003ctd\u003e1x \u003cstrong\u003e8-Pin DC Micro (M12)\u003c\/strong\u003e Quick-Disconnect Pigtail\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eEnvironmental \u0026amp; Physical\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eOperating Temperature Range\u003c\/td\u003e\n      \u003ctd\u003e\u003cstrong\u003e-25 °C to +125 °C\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eEnvironmental \u0026amp; Physical\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eEnvironmental Protection\u003c\/td\u003e\n      \u003ctd\u003e\n\u003cstrong\u003eIP68\u003c\/strong\u003e (Dust-Tight \u0026amp; Submersible)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eEnvironmental \u0026amp; Physical\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eEMC \u0026amp; Interference Immunity\u003c\/td\u003e\n      \u003ctd\u003ePassive Magnetic Reed Design (High EMI\/RFI Immunity)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eEnvironmental \u0026amp; Physical\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eHousing \u0026amp; Weight\u003c\/td\u003e\n      \u003ctd\u003eRectangular Stainless Steel \/ 0.26 kg (0.56 lbs)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cstrong\u003eInstallation \u0026amp; Commissioning Guidelines\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting Alignment:\u003c\/strong\u003e Secure the \u003cstrong style=\"color: #0056b3;\"\u003e440N-G02149\u003c\/strong\u003e switch body to the stationary frame and the magnetic actuator to the moving guard.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir Gap Verification:\u003c\/strong\u003e Maintain an operating air gap within the \u003cstrong\u003e15 mm\u003c\/strong\u003e sensing zone when the guard door closes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFerrous Surface Isolation:\u003c\/strong\u003e Avoid mounting directly onto unshielded ferromagnetic steel, which reduces effective magnetic sensing distance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePinout Termination:\u003c\/strong\u003e Connect the \u003cstrong\u003e8-pin M12 micro connector\u003c\/strong\u003e to a dual-channel safety relay using shielded industrial cordsets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFunctional Trip Testing:\u003c\/strong\u003e Open and close the guard door three times while verifying state transitions across both \u003cstrong\u003e2 N.C.\u003c\/strong\u003e channels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eSystem Compatibility \u0026amp; Certifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Controller Integration:\u003c\/strong\u003e Pairs directly with \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley\u003c\/strong\u003e Guardmaster safety relays (MSR series) and GuardLogix safety I\/O modules.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWiring Ecosystem:\u003c\/strong\u003e Compatible with standard 8-pin DC Micro (M12) female patchcords (such as \u003cstrong style=\"color: #0056b3;\"\u003e889D-F8AB\u003c\/strong\u003e series cables).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGlobal Compliance Standards:\u003c\/strong\u003e Engineered to meet \u003cstrong\u003eCE\u003c\/strong\u003e, \u003cstrong\u003ecULus\u003c\/strong\u003e, and \u003cstrong\u003eIEC 60947-5-3\u003c\/strong\u003e non-contact interlocking device standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eStandard Packing List\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x \u003cstrong style=\"color: #0056b3;\"\u003eAllen-Bradley 440N-G02149\u003c\/strong\u003e Non-Contact Safety Switch (with M12 8-Pin Pigtail)\u003c\/li\u003e\n  \u003cli\u003e1x Matching Rectangular Magnetic Actuator\u003c\/li\u003e\n  \u003cli\u003e1x Manufacturer Technical Installation Sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eEngineering Selection Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSelect the \u003cstrong style=\"color: #0056b3;\"\u003e440N-G02149\u003c\/strong\u003e when your application demands high thermal endurance up to \u003cstrong\u003e125 °C\u003c\/strong\u003e and washdown durability. For environments below 60 °C without caustic washdowns, standard ABS plastic \u003cstrong style=\"color: #d9534f;\"\u003e440N\u003c\/strong\u003e models offer a lighter alternative. Always verify that your downstream safety controller supports \u003cstrong\u003e24 VDC\u003c\/strong\u003e dual-channel monitoring with external auxiliary feedback.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does mounting the 440N-G02149 on a steel machine frame affect sensing distance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. Mounting magnetic switches directly on ferrous steel absorbs magnetic flux and reduces the \u003cstrong\u003e15 mm\u003c\/strong\u003e sensing range. Use non-magnetic spacers for optimal performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I wire multiple 440N-G02149 switches in series to one safety relay?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes, you can connect the \u003cstrong\u003e2 N.C.\u003c\/strong\u003e safety contacts in series. However, route each \u003cstrong\u003e1 N.O.\u003c\/strong\u003e auxiliary contact separately to PLC inputs to preserve individual door diagnostics.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why does this switch handle 125 °C while other proximity switches fail at 70 °C?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The \u003cstrong style=\"color: #d9534f;\"\u003eFRS21 GD2\u003c\/strong\u003e utilizes passive hermetically sealed reed contacts instead of heat-sensitive internal semiconductor electronics.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is the matching magnetic actuator included in the box?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. The \u003cstrong style=\"color: #0056b3;\"\u003e440N-G02149\u003c\/strong\u003e ships complete with its matched standard magnetic actuator.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":68047948513462,"sku":"440N-G02149","price":106.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/440N-G02149-1.jpg?v=1794465088","url":"https:\/\/www.plcsparehub.com\/products\/allen-bradley-440n-g02149-guardmaster-non-contact-safety-switch","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}