{"product_id":"allen-bradley-440r-d23171","title":"440R-D23171","description":"\u003ch2\u003eOverview of Allen Bradley 440R-D23171\u003c\/h2\u003e\nThe Allen Bradley 440R-D23171 is a high-performance MSR125HP safety relay designed for two-hand control applications requiring reliable safety monitoring. Operating at 24V DC, this single-function safety relay features two normally open (N.O.) safety outputs with immediate response, suitable for ensuring personnel protection in industrial environments. Its slim design allows easy rail mounting, making it a compact yet robust option for safety control circuits involving light curtains, interlock switches, safety mats, and emergency stop functions. Rated for a high safety category and performance level, it supports applications demanding compliance with stringent safety standards such as ISO 13849 and IEC 61508, offering dependable operation over 2 million cycles. With automatic\/manual reset and removable terminals, it combines user convenience with industrial-grade dependability.\n\n\u003ch2\u003eKey Features of Allen Bradley 440R-D23171\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-hand control safety relay with 24V DC power supply\u003c\/li\u003e\n\u003cli\u003eTwo immediate safety outputs (2 N.O.) for precise safety control\u003c\/li\u003e\n\u003cli\u003eSafety category 4 and performance level e compliance according to EN ISO 13849-1\u003c\/li\u003e\n\u003cli\u003eSIL 3 rating conforming to IEC 61508 ensures high reliability\u003c\/li\u003e\n\u003cli\u003eCompact dimensions: 99 mm height, 22.5 mm width, 114.5 mm depth suitable for DIN rail mounting\u003c\/li\u003e\n\u003cli\u003eRated operation current up to 8 A (6 A at AC-15 230 V, 3 A at DC-13 24 V)\u003c\/li\u003e\n\u003cli\u003eAutomatic and manual reset option for flexible control\u003c\/li\u003e\n\u003cli\u003eRemovable screw terminals for easy wiring and maintenance\u003c\/li\u003e\n\u003cli\u003eIP40 enclosure protection with IP20 rated terminals\u003c\/li\u003e\n\u003cli\u003eHigh resistance to shock (10 g) and vibration (0.35 mm displacement) for industrial use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specs of 440R-D23171\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n  \u003ctr\u003e\n    \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003cth\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003ePower Supply\u003c\/td\u003e\n    \u003ctd\u003e24 V DC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSafety Outputs\u003c\/td\u003e\n    \u003ctd\u003e2 Normally Open (N.O.) Immediate\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRated Operation Current (Ie)\u003c\/td\u003e\n    \u003ctd\u003e8 A (6 A AC-15 230 V, 3 A DC-13 24 V)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSafety Category\u003c\/td\u003e\n    \u003ctd\u003eCategory 4 (EN ISO 13849-1)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSIL Rating\u003c\/td\u003e\n    \u003ctd\u003eSIL 3 (IEC 61508)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMounting\u003c\/td\u003e\n    \u003ctd\u003eDIN Rail\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eDimensions (H x W x D)\u003c\/td\u003e\n    \u003ctd\u003e99 mm x 22.5 mm x 114.5 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eWeight\u003c\/td\u003e\n    \u003ctd\u003e0.46 kg\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eReset\u003c\/td\u003e\n    \u003ctd\u003eAutomatic\/Manual\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eIP Rating\u003c\/td\u003e\n    \u003ctd\u003eIP40 Enclosure, IP20 Terminals\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eShock Resistance\u003c\/td\u003e\n    \u003ctd\u003e10 g\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eVibration Frequency (Operational)\u003c\/td\u003e\n    \u003ctd\u003eUp to 55 Hz\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications \/ Use Case\u003c\/h2\u003e\nThe Allen Bradley 440R-D23171 safety relay is ideal for safeguarding machines and operators in various industrial settings. It is commonly used to implement two-hand control systems that require both hands of an operator for safe machine start-up to prevent accidental injury. Typical applications include integration with light curtains, safety mats, laser scanners, and interlocking devices in automation lines. The unit’s reliable safety outputs make it suitable for controlling emergency stops and enabling devices to meet strict safety regulations. This relay’s compact size and DIN rail compatibility enable easy incorporation into existing control panels in automotive manufacturing, packaging, material handling, and general machinery safety applications that demand high functional safety integrity.\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\/top-plc-brands-compared-siemens-allen-bradley-mitsubishi\" target=\"_blank\"\u003eTop PLC Brands Compared: Siemens, Allen Bradley \u0026amp; Mitsubishi\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  \u003cli\u003e\u003ca href=\"https:\/\/leadtime.ca\/products\/allen-bradley-1783-ims28rac\" target=\"_blank\"\u003eAllen Bradley 1783-IMS28RAC Managed Switch\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":47870738694443,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4671\/7995\/files\/Leadtime_4add0ee0-6697-4b98-9f2d-a9b3be5e108c.png?v=1723533299","url":"https:\/\/leadtime.ca\/products\/allen-bradley-440r-d23171","provider":"LEADTIME","version":"1.0","type":"link"}