{"product_id":"1756-l73sk-ab-allen-bradley-guardlogix-controller-module","title":"1756-L73SK | AB Allen-Bradley GuardLogix Controller Module","description":"\u003ch3\u003eProduct Summary\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-L73SK\u003c\/strong\u003e is a \u003cstrong\u003eGuardLogix 5570 Safety Controller\u003c\/strong\u003e by Rockwell Automation, featuring \u003cstrong\u003e8 MB standard memory + 4 MB safety memory\u003c\/strong\u003e with \u003cstrong\u003econformal coating\u003c\/strong\u003e. It combines standard and safety control in a single module with \u003cstrong\u003eSIL 3 \/ PLe\u003c\/strong\u003e certification, and supports \u003cstrong\u003eControlLogix redundancy\u003c\/strong\u003e for fault-tolerant applications. The \u003cstrong\u003e-K suffix\u003c\/strong\u003e denotes the conformal coated version for enhanced protection in harsh industrial environments.\u003c\/p\u003e\n\n\u003ch3\u003eCore Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e 1756-L73SK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e GuardLogix 5570 Safety Controller with Conformal Coating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Rating:\u003c\/strong\u003e SIL 3 \/ PLe (Cat 4)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Memory:\u003c\/strong\u003e 8 MB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Memory:\u003c\/strong\u003e 4 MB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNon-Volatile Memory:\u003c\/strong\u003e 1784-SD1 (1 GB SD card included)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eI\/O Capacity:\u003c\/strong\u003e 128,000 digital \/ 4,000 analog I\/O points\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eController Connections:\u003c\/strong\u003e 500\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEtherNet\/IP Nodes:\u003c\/strong\u003e 32\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotion Axes:\u003c\/strong\u003e 8 CIP motion axes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChassis Slots:\u003c\/strong\u003e 4, 7, 10, 13, 17 (1756 series)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication:\u003c\/strong\u003e USB 2.0 (programming); EtherNet\/IP, ControlNet, DeviceNet via 1756 communication modules\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 4-character alpha\/numeric\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProgramming:\u003c\/strong\u003e Studio 5000 Logix Designer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Allen-Bradley by Rockwell Automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical \u0026amp; Functional Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e 1.1 A at 5.1 VDC; 3 mA at 24 VDC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 6.2 W typical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTask Types:\u003c\/strong\u003e Continuous, periodic, event, and safety tasks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Task Period:\u003c\/strong\u003e Configurable down to 6 ms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Processor Architecture:\u003c\/strong\u003e Separates safety and standard logic execution\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRedundancy Support:\u003c\/strong\u003e Compatible with 1756-RM2 redundancy modules for paired chassis configurations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConformal Coating:\u003c\/strong\u003e Protects circuit boards from moisture, dust, and corrosive gases (ISA G3 compliant)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Port:\u003c\/strong\u003e Full-speed USB 2.0 for local programming and firmware updates\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e RUN, FORCE, SD (safety disabled), SF (safety fault), I\/O status, and USB activity LEDs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSystem Integration \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Platform:\u003c\/strong\u003e ControlLogix 1756 chassis\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Partner:\u003c\/strong\u003e 1756-L7SP (required for SIL 3 \/ PLe in adjacent slot)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety I\/O Modules:\u003c\/strong\u003e 1756-LSC8XIB8I, POINT Guard I\/O, FLEX 5000 Safety I\/O\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication Modules:\u003c\/strong\u003e 1756-EN2T, 1756-EN3TR, 1756-CN2R, 1756-DNB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Chassis:\u003c\/strong\u003e 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSoftware Version:\u003c\/strong\u003e Studio 5000 Logix Designer v20 or later with GuardLogix safety license\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelated Parts:\u003c\/strong\u003e 1756-L73S (non-coated), 1756-L73SXT (Xtreme temperature), 1756-L72SK (4 MB + 2 MB safety), 1756-L71SK (2 MB + 1 MB safety)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEnvironmental \u0026amp; Operational Limits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to 60°C (32°F to 140°F)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -40°C to +85°C (-40°F to 185°F)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 5% to 95% RH, non-condensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVibration:\u003c\/strong\u003e 2G, 10 to 500 Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShock:\u003c\/strong\u003e 30G operating; 50G non-operating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApprovals:\u003c\/strong\u003e TÜV Rheinland certified for SIL 3 \/ PLe, UL, cUL, CE, ATEX, RoHS\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cp\u003eWidely deployed in oil \u0026amp; gas platforms, high-availability process systems, pharmaceutical manufacturing, automotive assembly lines, safety-critical material handling, burner management systems, and emergency shutdown (ESD) applications requiring fault-tolerant safety control in harsh environments.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eWhat is the difference between 1756-L73S and 1756-L73SK?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003e1756-L73S\u003c\/strong\u003e is the standard GuardLogix safety controller with 8 MB + 4 MB safety memory. The \u003cstrong\u003e1756-L73SK\u003c\/strong\u003e adds \u003cstrong\u003econformal coating\u003c\/strong\u003e for enhanced protection against moisture, dust, and corrosive gases in harsh industrial environments. All other specifications are identical.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need a safety partner module?\u003c\/h4\u003e\n\u003cp\u003eFor \u003cstrong\u003eSIL 3 \/ PLe\u003c\/strong\u003e applications, the \u003cstrong\u003e1756-L7SP\u003c\/strong\u003e safety partner module is required in the slot immediately to the right of the controller. Without the L7SP, the controller operates at \u003cstrong\u003eSIL 2 \/ PLd\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch4\u003eWhat does the conformal coating protect against?\u003c\/h4\u003e\n\u003cp\u003eThe conformal coating protects the controller's circuit boards from moisture, dust, and corrosive gases (ISA G3 rated), making it suitable for chemical plants, offshore platforms, and other harsh industrial environments.\u003c\/p\u003e\n\n\u003ch4\u003eWhat is the difference between 1756-L73SK and 1756-L73SXT?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003e1756-L73SK\u003c\/strong\u003e has conformal coating for harsh environments (0°C to 60°C). The \u003cstrong\u003e1756-L73SXT\u003c\/strong\u003e is an \u003cstrong\u003eXtreme Temperature\u003c\/strong\u003e variant rated for \u003cstrong\u003e-20°C to +70°C\u003c\/strong\u003e with conformal coating.\u003c\/p\u003e\n\n\u003ch4\u003eWhat are the related part numbers?\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1756-L71SK — GuardLogix 5570, 2 MB + 1 MB safety, conformal coated\u003c\/li\u003e\n  \u003cli\u003e1756-L72SK — GuardLogix 5570, 4 MB + 2 MB safety, conformal coated\u003c\/li\u003e\n  \u003cli\u003e1756-L73S — GuardLogix 5570, 8 MB + 4 MB safety, standard\u003c\/li\u003e\n  \u003cli\u003e1756-L73SK — GuardLogix 5570, 8 MB + 4 MB safety, conformal coated (this part)\u003c\/li\u003e\n  \u003cli\u003e1756-L73SXT — GuardLogix 5570, 8 MB + 4 MB safety, Xtreme temperature\u003c\/li\u003e\n  \u003cli\u003e1756-L7SP — Safety Partner Module (required for SIL 3 \/ PLe)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53684224327864,"sku":"1756-L73SK","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1756-L73SK.png?v=1782895401","url":"https:\/\/www.globalpetroparts.com\/products\/1756-l73sk-ab-allen-bradley-guardlogix-controller-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}