{"product_id":"allen-bradley-440g-lzs21spla","title":"440G-LZS21SPLA","description":"\u003ch2\u003eOverview of Allen Bradley 440G-LZS21SPLA\u003c\/h2\u003e\nThe Allen Bradley 440G-LZS21SPLA is part of the Guardmaster 440G-LZ series of guard locking switches. It features advanced safety interlock technology designed to ensure secure guarding of hazardous machinery by preventing operation while guard doors are open. This model operates on a 24V DC power-to-lock solenoid mechanism with two normally closed safety contacts and one normally open auxiliary contact, delivering dependable safety output signals. Its durable plastic housing and integrated actuator with a 3-meter PVC cable provide sturdy performance in industrial environments. Certified to SIL 3, PLe, and Cat 4 safety standards, the 440G-LZS21SPLA supports high safety integrity levels and compliance with ISO 14119 and IEC 62061 requirements for machinery safeguarding. This makes it suitable for critical safety applications requiring reliable guard locking and door monitoring[1][2][4].\n\n\u003ch2\u003eKey Features of Allen Bradley 440G-LZS21SPLA\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePower-to-lock solenoid actuator with a 3m PVC cable for flexible installation\u003c\/li\u003e\n  \u003cli\u003eTwo normally closed safety contacts (OSSD type) for safety feedback\u003c\/li\u003e\n  \u003cli\u003eOne normally open auxiliary contact for guard status indication\u003c\/li\u003e\n  \u003cli\u003ePlastic housing optimized for industrial durability and ease of mounting\u003c\/li\u003e\n  \u003cli\u003eCertified to ISO 14119, IEC 60947-5-3, IEC 62061 with SIL 3, PLe, and Cat 4 ratings\u003c\/li\u003e\n  \u003cli\u003eLow quiescent power consumption (1.5W locked or unlocked state)\u003c\/li\u003e\n  \u003cli\u003eLocking bolt alignment tolerance of ±2.5 mm allowing precise operation\u003c\/li\u003e\n  \u003cli\u003eHolding force up to 1690 N, securing guards effectively against unintended opening\u003c\/li\u003e\n  \u003cli\u003eDiagnostic LED indicators for easy status monitoring on-site\u003c\/li\u003e\n  \u003cli\u003eDesigned for safety door interlocking on partial body access guards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specs of 440G-LZS21SPLA\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e24V DC ±10%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSafety Contacts\u003c\/td\u003e\n\u003ctd\u003e2 normally closed (PNP, 0.2 A max)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eAuxiliary Contacts\u003c\/td\u003e\n\u003ctd\u003e1 normally open (PNP, 0.2 A max)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eHolding Force\u003c\/td\u003e\n\u003ctd\u003e1690 N (EN\/ISO 14119)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eLocking Bolt Alignment\u003c\/td\u003e\n\u003ctd\u003e±2.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W (locked or unlocked)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25 to +70 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePlastic housing\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMechanical Life\u003c\/td\u003e\n\u003ctd\u003e500,000 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSafety Standards\u003c\/td\u003e\n\u003ctd\u003eIEC 62061 SIL 3, ISO 13849-1 PLe, IEC 60947-5-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications \/ Use Case\u003c\/h2\u003e\nThe Allen Bradley 440G-LZS21SPLA is widely used in industrial automation for safeguarding machinery access points and protecting personnel from hazardous machine operations. It is ideal for use on safety doors, gates, or guards where controlled access is mandatory to prevent accidental start-up or exposure to dangerous machine parts. Typical applications include manufacturing lines, packaging machinery, robotic cells, and conveyor systems. The switch’s power-to-lock function ensures guards remain securely locked during machine operation and only releases with a safe unlock signal. Its robust safety certifications make it suitable for meeting stringent safety requirements in automotive, food and beverage, pharmaceutical, and heavy machinery industries. This switch aids compliance with workplace safety regulations by integrating easily into safety control circuits and providing clear status feedback for system monitoring[1][4][7].\n\n\u003ch2\u003eRelated Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/\" target=\"_blank\"\u003eLeadTime.ca – Industrial Automation Components \u0026amp; Repair Services\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/collections\/allen-bradley\" target=\"_blank\"\u003eView All Allen Bradley Products\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/blogs\/learning-center\/examples-of-industrial-automation-control-systems\" target=\"_blank\"\u003eExamples of Industrial Automation and Control Systems\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/products\/allen-bradley-1756-en2tr\" target=\"_blank\"\u003eAllen Bradley 1756-EN2TR EtherNet\/IP Module\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/products\/allen-bradley-194e-sy\" target=\"_blank\"\u003eAllen Bradley 194E-SY Disconnect Switch\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\n\n","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":47814752862507,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4671\/7995\/files\/Leadtime_dadec1ff-5dce-407e-8cbc-62b058bb2593.png?v=1723539619","url":"https:\/\/leadtime.ca\/products\/allen-bradley-440g-lzs21spla","provider":"LEADTIME","version":"1.0","type":"link"}