{"product_id":"allen-bradley-controllogix-1756-l72-controllogix-4-mb-controller","title":"Allen-Bradley 1756-L72 ControlLogix 4 MB Controller","description":"\u003cp\u003eThe Allen-Bradley 1756-L72 is a high-performance standard controller within the ControlLogix 5570 series, engineered for demanding industrial automation environments. This controller provides 4 MB of user memory and 0.98 MB of I\/O memory, supporting complex logic execution across up to 32 independent tasks, with each task capable of running 100 individual programs.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e4 MB user memory and 0.98 MB I\/O memory for complex logic and data handling.\u003c\/li\u003e\n\u003cli\u003eSupports up to 32 tasks with 100 programs per task.\u003c\/li\u003e\n\u003cli\u003eCapacitor-based energy storage eliminates the need for traditional batteries for memory retention.\u003c\/li\u003e\n\u003cli\u003eIntegrated USB port for efficient local configuration and data transfer.\u003c\/li\u003e\n\u003cli\u003eSupports diverse communication protocols including Ethernet\/IP, ControlNet, DeviceNet, and Data Highway Plus.\u003c\/li\u003e\n\u003cli\u003eIncludes a 1 GB Secure Digital (SD) card (1784-SD1) for non-volatile storage and diagnostic logging.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAutomotive Assembly Lines: Part tracking, serialization, and robotics control.\u003c\/li\u003e\n\u003cli\u003eWarehouse \u0026amp; Material Handling: Automated storage and retrieval systems (ASRS) and sorting gates.\u003c\/li\u003e\n\u003cli\u003eWater \u0026amp; Wastewater Treatment: PID loop control for dosing, leveling, and telemetry.\u003c\/li\u003e\n\u003cli\u003eOil, Gas, \u0026amp; Petrochemical: Custody transfer, gas compression, and separator skid management.\u003c\/li\u003e\n\u003cli\u003ePower Generation \u0026amp; Utilities: Balance of Plant (BoP) and fuel network monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Model\u003c\/td\u003e\n\u003ctd\u003e1756-L72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Memory\u003c\/td\u003e\n\u003ctd\u003e4 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Memory\u003c\/td\u003e\n\u003ctd\u003e0.98 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Digital I\/O\u003c\/td\u003e\n\u003ctd\u003e128,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Analog I\/O\u003c\/td\u003e\n\u003ctd\u003e4,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Draw @ 1.2V DC\u003c\/td\u003e\n\u003ctd\u003e5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Draw @ 5.1V DC\u003c\/td\u003e\n\u003ctd\u003e800 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e2.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e8.5 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNonvolatile Storage\u003c\/td\u003e\n\u003ctd\u003e1 GB SD Card (1784-SD1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the controller is seated firmly in a 1756 chassis (e.g., 1756-A4, A7, A10, A13, or A17).\u003c\/li\u003e\n\u003cli\u003eVerify backplane power balancing: The sum of current draw across 1.2V, 5.1V, and 24V rails must not exceed the capacity of the installed power supply.\u003c\/li\u003e\n\u003cli\u003eAlways power down the chassis before inserting or removing the controller to prevent electrical damage.\u003c\/li\u003e\n\u003cli\u003eUse external suppression (diodes for DC, MOV\/RC snubbers for AC) on all inductive loads such as relays and solenoids to mitigate electrical noise.\u003c\/li\u003e\n\u003cli\u003eHandle with standard ESD precautions to protect internal components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eDoes the 1756-L72 require a physical battery?\u003c\/h3\u003e\u003cp\u003eNo, the 1756-L72 utilizes maintenance-free, built-in supercapacitors to retain memory and maintain the Real-Time Clock during power cycles.\u003c\/p\u003e\u003ch3\u003eWhat storage media is compatible?\u003c\/h3\u003e\u003cp\u003eThe unit uses removable SD cards. It ships with a 1 GB 1784-SD1 card, which is used for firmware, program loading, and automatic diagnostic data storage during faults.\u003c\/p\u003e\u003ch3\u003eIs this controller compatible with existing ControlLogix chassis?\u003c\/h3\u003e\u003cp\u003eYes, it is compatible with standard 1756 series chassis, including those with conformal coating.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51015597293820,"sku":"1756-L72","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_1e07fc8d-ff86-4b13-ba76-45085e0186cd.jpg?v=1787767491","url":"https:\/\/www.electronicplc.com\/es\/products\/allen-bradley-controllogix-1756-l72-controllogix-4-mb-controller","provider":"Electronic PLC","version":"1.0","type":"link"}