{"product_id":"1753-l28bbbm-allen-bradley-guardplc-1600-safety-controller","title":"1753-L28BBBM Allen-Bradley | GuardPLC 1600 Safety Controller","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1753-L28BBBM\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a high-performance safety controller within the GuardPLC 1600 product line. This specialized logic engine handles critical safety-instrumented functions in complex industrial environments. It processes 20 digital safety inputs and drives 8 safety outputs, ensuring that machinery reaches a safe state within milliseconds of a fault detection. We provide this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, allowing you to maintain or expand legacy safety systems without compromising the integrity of your SIL 3 or PLe safety ratings.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eUser Memory\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250 KB User Program Memory\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDigital Inputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20 Points (24V DC)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDigital Outputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 Points (0.5A - 1.0A)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24V DC Nominal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSafety Response Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20 ms Minimum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWatchdog Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10 ms Minimum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 A Maximum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eEnvironmental Protection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP20 Open Style\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.44 lbs (1.11 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Safety Execution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1753-L28BBBM features a minimum safety response time of 20 ms. This rapid processing ensures that safety loops—including light curtains and E-stop circuits—trigger mechanical stops fast enough to prevent operator injury in high-speed manufacturing cells.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRedundant Logic Processing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe GuardPLC 1600 architecture utilizes a 10 ms watchdog timer to monitor internal processor health continuously. This hardware-level supervision prevents erratic behavior and ensures the controller defaults to a safe-state if it detects any internal logic inconsistency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust I\/O Density:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrating 20 inputs and 8 outputs into a single compact footprint reduces the need for multiple expansion modules. This streamlines cabinet layout and minimizes the complexity of safety network wiring in multi-zone robotic cells.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecise On-State Thresholds:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe input circuitry accepts a wide on-state voltage range (15V to 30V DC). This tolerance accommodates voltage drops over long field cable runs while maintaining a strict 7.5 mA current draw at 30V to ensure reliable signal detection even in electrically noisy environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit support standard EtherNet\/IP for safety data?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1753-L28BBBM primarily utilizes the GuardPLC Ethernet protocol for safety-critical communication between other GuardPLC controllers and distributed I\/O. It provides deterministic data packets to ensure safety timings remain consistent across the network.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 250 KB memory sufficient for complex safety logic?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Safety programs typically utilize high-efficiency function blocks rather than standard ladder logic. The 250 KB user program memory provides ample space for large-scale safety architectures involving multiple zones and complex interlocking logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this product a modern reproduction or original Allen-Bradley stock?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe supply only\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New, original Allen-Bradley hardware\u003c\/strong\u003e. Each unit comes in its original factory packaging. Because safety controllers have strict certification requirements, we never sell refurbished or used 1753-L28BBBM modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the grounding requirements for this controller?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou must provide a low-impedance ground connection to the chassis to ensure electromagnetic compatibility (EMC). Proper grounding prevents common-mode noise from interfering with the 24V DC input signals, which could otherwise lead to nuisance trips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52774505185589,"sku":"1753-L28BBBM","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1753-L28BBBM.jpg?v=1776828998","url":"https:\/\/www.5gplc.com\/products\/1753-l28bbbm-allen-bradley-guardplc-1600-safety-controller","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}