{"product_id":"1756-l81e-industrial-automation-module-by-allen-bradley","title":"1756-L81E Industrial Automation Module by Allen-Bradley","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1756-L81E is a ControlLogix 5580 Programmable Automation Controller (PAC) engineered for demanding industrial applications. As part of the modern ControlLogix 5580 family, this controller delivers high-speed processing, integrated communication, and robust memory—making it an ideal migration path for legacy PLC-5 or SLC 500 systems.\u003c\/p\u003e\u003cp\u003eWith 3 MB of user memory and a 2 GB non-volatile SD card (1784-SD2), the 1756-L81E handles complex control tasks with ease. It supports up to 128,000 digital I\/O and 4,000 analog I\/O points, ensuring scalability for large-scale operations.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Communication:\u003c\/strong\u003e One Ethernet port (10\/100\/1000 Mbps) and one USB 2.0 port (12 Mbps) for flexible connectivity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Capacity:\u003c\/strong\u003e Supports up to 60 EtherNet\/IP nodes and 32 tasks with 1,000 programs per task.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Friendly Display:\u003c\/strong\u003e 4-character alphanumeric display for local status and diagnostics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery-Free Backup:\u003c\/strong\u003e Environmentally friendly energy storage eliminates the need for battery-backed RAM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Design:\u003c\/strong\u003e Open-style enclosure, operates in 0–60 °C, withstands 30G shock and 2G vibration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1756-L81E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eControlLogix Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Memory\u003c\/td\u003e\n\u003ctd\u003e3 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 Volts Continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e6.2 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Draw (5.1V)\u003c\/td\u003e\n\u003ctd\u003e1.20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Draw (1.2V DC)\u003c\/td\u003e\n\u003ctd\u003e5.0 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e21.2 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003eOne (1) Ethernet; One (1) USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Digital I\/O\u003c\/td\u003e\n\u003ctd\u003e128,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Analog I\/O\u003c\/td\u003e\n\u003ctd\u003e4,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eNone (Open-Style)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1756-L81E installs into any single slot of standard ControlLogix chassis, including 1756-A4, A7, A10, A13, and A17 (Series B\/C). It works with a broad range of standard power supplies (1756-PA50, PA72, PB50, PB75, etc.) and redundant power supplies (1756-PA75R, PB75R, PSCA2) for high-availability systems.\u003c\/p\u003e\u003cp\u003eProgramming is supported in the Studio 5000 environment, ensuring seamless integration into existing Rockwell Automation architectures. The controller's EtherNet\/IP capability allows connection to up to 60 devices, making it suitable for distributed control networks.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup\u003c\/h2\u003e\u003cp\u003eMount the 1756-L81E in any available slot of the ControlLogix chassis. Ensure proper power supply connection and grounding per the user manual. After installation, configure the controller using Studio 5000, setting the IP address and task priorities as needed. The USB port provides a convenient local programming interface, while the Ethernet port enables network-based access.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eWith no battery to replace, the 1756-L81E reduces routine maintenance. Periodically check the ambient temperature and humidity (0–60 °C, 5–95% non-condensing) to ensure optimal performance. The controller's robust design—rated for 30G shock and 2G vibration—ensures reliable operation in harsh environments. Regular firmware updates via Studio 5000 help maintain security and functionality.\u003c\/p\u003e\u003ch2\u003eBuying Guide\u003c\/h2\u003e\u003cp\u003eWhen purchasing the Allen-Bradley 1756-L81E, verify that the part number matches your requirement and that the firmware version is compatible with your Studio 5000 installation. Consider the chassis type and power supply compatibility as listed above. For a reliable source, PLC Source PRO offers genuine Allen-Bradley modules with competitive pricing and fast shipping.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44435147751523,"sku":"1756-L81E","price":295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1756-2WS_72310707-1bef-4473-8dd1-4e43e6cbafa6.jpg?v=1785784130","url":"https:\/\/www.plcsourcepro.com\/he\/products\/1756-l81e-industrial-automation-module-by-allen-bradley","provider":"PLC Source PRO","version":"1.0","type":"link"}