{"product_id":"allen-bradley-440n-z21s16h-guardmaster-sipha-non-contact-safety-switch","title":"Allen-Bradley 440N-Z21S16H Guardmaster Sipha Non-Contact Safety Switch","description":"\u003ch2\u003eAllen-Bradley 440N-Z21S16H Guardmaster Sipha Non-Contact Safety Switch\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 440N-Z21S16H\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e440N-Z21S16H\u003c\/strong\u003e Guardmaster Sipha safety switch, provides coded non-contact guard monitoring through magnetic sensing and dedicated control-unit supervision.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e440N-Z21S16H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley Guardmaster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSipha\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eNon-contact magnetically coded safety switch, sensor and actuator set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eRed ABS plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensing Distance (Make)\u003c\/td\u003e\n\u003ctd\u003eApprox. 5 mm to 10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreak Distance\u003c\/td\u003e\n\u003ctd\u003eApprox. 12 mm to 15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContacts \/ Outputs\u003c\/td\u003e\n\u003ctd\u003e1 NO + 1 NC magnetic switch contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003eApprox. 3 m pre-wired cable, 6-core; M12 connector may apply to specific sub-variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003eLow-voltage signal circuits connected to a Sipha Control Unit; 24 VDC systems cited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Integrity\u003c\/td\u003e\n\u003ctd\u003eUp to SIL 3 \/ PLe depending on complete system configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eMagnetically Coded Safety Switching\u003c\/h3\u003e\n\u003cp\u003eThe Sipha sensor uses magnetically coded non-contact operation and requires its designated actuator for switching.\u003c\/p\u003e\n\u003cp\u003eThe coded arrangement provides resistance to simple actuator substitution and unauthorized defeat during guard monitoring.\u003c\/p\u003e\n\u003cp\u003eThe switching element provides one normally open and one normally closed magnetic contact for status monitoring.\u003c\/p\u003e\n\u003cp\u003eThe sensor interfaces with a dedicated Sipha Control Unit rather than functioning as an independent safety controller.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 440N-Z21S16H directly provide a safety-rated control function?\u003c\/p\u003e\n\u003cp\u003eA: No. The sensor provides magnetic switching contacts, while safety evaluation depends on the associated Sipha Control Unit and complete system configuration.\u003c\/p\u003e\n\u003cp\u003eQ: What operating distance should be maintained between the sensor and actuator?\u003c\/p\u003e\n\u003cp\u003eA: The supplied data specifies approximately 5 mm to 10 mm for make operation and 12 mm to 15 mm for break operation.\u003c\/p\u003e\n\u003cp\u003eQ: Is the 440N-Z21S16H suitable for exposed industrial installation?\u003c\/p\u003e\n\u003cp\u003eA: The supplied enclosure specification is IP67, with an operating temperature range of -10 deg C to +55 deg C.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the sensor and actuator with their sensing faces correctly aligned according to the applicable Sipha installation documentation.\u003c\/li\u003e\n\u003cli\u003eMaintain the specified switching and release distances throughout the complete guard movement.\u003c\/li\u003e\n\u003cli\u003eSecure the sensor and actuator against mechanical displacement, vibration, and unauthorized adjustment.\u003c\/li\u003e\n\u003cli\u003eRoute the signal cable separately from high-voltage power conductors and switching-current wiring where practical.\u003c\/li\u003e\n\u003cli\u003eAvoid sharp cable bends, excessive mechanical tension, and unsupported cable sections near the sensor connection.\u003c\/li\u003e\n\u003cli\u003eConnect the NO and NC contacts according to the designated Sipha Control Unit circuit configuration.\u003c\/li\u003e\n\u003cli\u003eDo not apply supply voltage directly to the switching contacts unless permitted by the associated control-unit specification.\u003c\/li\u003e\n\u003cli\u003eTerminate cable shielding according to the control-system grounding scheme when shielded wiring is used.\u003c\/li\u003e\n\u003cli\u003eVerify guard alignment, switching state, cable continuity, and control-unit diagnostics after installation.\u003c\/li\u003e\n\u003cli\u003eConfirm the complete safety function, including the control unit and final switching elements, before placing machinery into service.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43874643771482,"sku":"440N-Z21S16H","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/440N-Z21S16H2.jpg?v=1787217990","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-440n-z21s16h-guardmaster-sipha-non-contact-safety-switch","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}