{"product_id":"1756-l65-allen-bradley-controllogix-processor-buy-cpu-module","title":"1756-L65 Allen-Bradley ControlLogix Processor | Buy CPU Module","description":"\u003ch2\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e Allen-Bradley ControlLogix 32MB Controller Architecture\u003c\/h2\u003e\n\u003cp\u003eEngineered for large-scale, high-performance process and discrete manufacturing automation, the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e is a flagship Series B programmable automation controller from the Allen-Bradley ControlLogix 5560 family by Rockwell Automation. Equipped with a robust 32 MB user memory pool and 478 KB of dedicated I\/O memory, this powerful CPU module manages up to 128,000 total digital I\/O points and 4,000 analog points. Designed to slot smoothly into universal ControlLogix chassis such as the 1756-A7, 1756-A13, or 1756-A17, it delivers dependable execution across complex multi-tasking industrial environments.\u003c\/p\u003e\n\u003ch3\u003eComprehensive Technical Specifications \u0026amp; Operational Metrics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer \/ Brand \/ Series:\u003c\/strong\u003e Rockwell Automation \/ Allen-Bradley \/ \u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003eControlLogix\u003c\/a\u003e Series B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number \u0026amp; Module Type:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e (Central Processing Unit Processor Module)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser Memory \u0026amp; I\/O Capacity:\u003c\/strong\u003e 32 MB total user memory (logic and data); 478 KB I\/O memory\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum I\/O Handling:\u003c\/strong\u003e Up to 128,000 digital I\/O and 4,000 analog I\/O points\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current Draw:\u003c\/strong\u003e 1200 mA at 5.1 VDC and 14 mA at 24 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower \u0026amp; Thermal Dissipation:\u003c\/strong\u003e 3.5 Watts operational power loss; 11.9 BTU\/hour thermal output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation \u0026amp; Voltage Testing:\u003c\/strong\u003e 30 V continuous isolation voltage; type-tested at 720 VDC for 60 seconds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTask Capabilities:\u003c\/strong\u003e Supports up to 32 independent tasks, 100 programs per task, and comprehensive event-triggered tasks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Ratings:\u003c\/strong\u003e Operating temperature 0°C to 60°C; Storage temperature -40°C to 85°C; 5% to 95% non-condensing humidity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight \u0026amp; Field Experience\u003c\/h3\u003e\n\u003cp\u003eWhen deploying legacy processor replacements like the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e into existing plant networks, Global PLC Spare HUB field engineers recommend auditing total project memory utilization and scan time variations. Because the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e features a massive 32 MB user memory footprint, loading large, unoptimized legacy code structures can occasionally yield slightly slower scan cycles compared to smaller L6x models. Always verify that your backup lithium battery (strictly 1756-BA2) is fresh and properly seated to prevent volatile memory loss during scheduled power maintenance windows.\u003c\/p\u003e\n\u003ch3\u003eInstallation, Hardware Compatibility \u0026amp; Expansion Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Compatibility:\u003c\/strong\u003e Fully compatible with standard ControlLogix rack architectures including 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 backplanes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNonvolatile Memory Option:\u003c\/strong\u003e Optional nonvolatile storage is supported exclusively via the 128 MB CompactFlash 1756-CF128 memory card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Motion \u0026amp; Networks:\u003c\/strong\u003e Supports SERCOS interface motion control, CIP Motion over EtherNet\/IP, and multi-network bridging across ControlNet, DeviceNet, DH+, and remote I\/O lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgramming Languages:\u003c\/strong\u003e Fully supports standard IEC 61131-3 languages including Relay Ladder Logic, Structured Text, Function Block Diagrams, and Sequential Function Charts (SFC).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvanced Diagnostics \u0026amp; System Fault Detection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eController Connections:\u003c\/strong\u003e Manages up to 250 active controller connections simultaneously across diverse industrial network modules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Serial Port:\u003c\/strong\u003e Features an onboard RS-232 communication port supporting ASCII, DF1 full\/half-duplex, DF1 radio modem, DH-485, and Modbus via logic protocols.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostic Reporting:\u003c\/strong\u003e Automatically logs major\/minor faults, watchdog timeouts, and battery degradation directly into the Studio 5000 \/ RSLogix 5000 controller diagnostic buffer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTarget Equipment \u0026amp; Typical Industrial Application Scenarios\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomotive Assembly Plants:\u003c\/strong\u003e Coordinating high-speed robotic welding cells and synchronous transfer lines over EtherNet\/IP and ControlNet networks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Process Refineries:\u003c\/strong\u003e Managing large-scale distributed control loops, redundant safety interlocks, and multi-node DCS data acquisition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Generation Facilities:\u003c\/strong\u003e Overseeing turbine auxiliary controls, fuel management systems, and high-density analog sensor telemetry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal Logistics, Warranty \u0026amp; Procurement Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpress Freight Carriers:\u003c\/strong\u003e Prompt international dispatch handled securely through trusted global couriers including FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFulfillment Speed:\u003c\/strong\u003e Standard orders are processed, tested, and dispatched within \u003cstrong\u003e24 to 48 hours\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assurance Guarantee:\u003c\/strong\u003e Backed by an industry-standard \u003cstrong\u003e12-month warranty\u003c\/strong\u003e covering all structural and electronic functional defects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch3\u003eQ: Can I use any generic lithium replacement battery in the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e controller?\u003c\/h3\u003e\n\u003cp\u003eA: No, the \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e requires the specific 1756-BA2 lithium battery model to maintain volatile RAM memory during power outages safely.\u003c\/p\u003e\n\u003ch3\u003eQ: What is the maximum CompactFlash card size supported for nonvolatile memory backup?\u003c\/h3\u003e\n\u003cp\u003eA: The controller exclusively supports the 128 MB CompactFlash memory card designated as model 1756-CF128 for nonvolatile storage backups.\u003c\/p\u003e\n\u003ch3\u003eQ: How many total controller connections can this processor handle across active networks?\u003c\/h3\u003e\n\u003cp\u003eA: The \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e is engineered to support a maximum of 250 active controller-to-controller and HMI connections simultaneously.\u003c\/p\u003e\n\u003ch3\u003eQ: What causes a noticeable scan time increase when migrating code from a smaller ControlLogix processor?\u003c\/h3\u003e\n\u003cp\u003eA: Larger memory allocations (32 MB) and complex task structuring can introduce minor scan execution variance; optimizing routine execution and task priorities resolves this.\u003c\/p\u003e\n\u003ch3\u003eQ: Purchasing Guidance: What system power supply factors should I check before installing a replacement \u003cstrong\u003e\u003cspan style=\"color: #0056b3;\"\u003e1756-L65\u003c\/span\u003e\u003c\/strong\u003e module?\u003c\/h3\u003e\n\u003cp\u003eA: Verify that your rack power supply can handle the 1200 mA current draw at 5.1 VDC demanded by the processor without exceeding total backplane wattage capacity.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013898690742,"sku":"1756-L65","price":121.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-L65.jpg?v=1786521752","url":"https:\/\/www.plcsparehub.com\/products\/1756-l65-allen-bradley-controllogix-processor-buy-cpu-module","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}