{"product_id":"1756-m2-allen-bradley-controllogix-1-mb-expansion-memory-module","title":"1756-M2 | Allen Bradley | ControlLogix 1 MB Expansion Memory Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1756-M2\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a specialized expansion memory module designed specifically for the first-generation ControlLogix® controller platform. This module provides 1 MB of additional user memory to support larger program logic, increased tag storage, and more complex data arrays. While the manufacturer has discontinued the 1756-M2, it remains a critical component for facilities running legacy Logix5550™ systems that require a memory boost without a complete processor migration. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% brand new and original\u003c\/strong\u003e, ensuring maximum data integrity for your existing automation architecture.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1756-M2 integrates directly into compatible 1756-series processors to expand operational capacity:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\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\u003eMemory Capacity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 Mbyte Words\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eExpansion Memory (SRAM)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCompatible Controllers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1756-L1, 1756-L1M1, 1756-L1M2, 1756-L1M3\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eControlLogix \/ Logix5550\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePLC Module \/ Rack\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNet Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.75 lbs (0.34 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eInternal Processor Slot\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\u003eSeamless Logic Expansion:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1756-M2 instantly increases the available user memory for legacy L1-series processors. This allows engineers to download larger ladder logic routines and expanded function block structures to aging hardware that would otherwise reach its capacity limit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePreserves Legacy Infrastructure:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eInstalling this expansion module eliminates the need for expensive and time-consuming controller upgrades. It provides a mechanical and fiscal solution for keeping proven automation lines running efficiently.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDirect Hardware Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module fits securely into the dedicated memory expansion slot on the front of the 1756-L1 series controllers. This internal mounting maintains the original footprint of the CPU within the ControlLogix chassis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Data Access:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1756-M2 utilizes high-speed static RAM to ensure the processor maintains its original scan rates. Adding this memory does not compromise the deterministic performance of the Logix5550 engine.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReliable Data Retention:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhen used with the controller’s standard battery, the 1756-M2 retains stored programs and tag values during power cycles, preventing data loss and ensuring immediate machine recovery upon restart.\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\u003eWhich specific controllers support the 1756-M2 expansion?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis module only works with early-generation ControlLogix processors, specifically the 1756-L1 and its sub-models (L1M1, L1M2, L1M3). Newer processors, such as the 1756-L6 or L7 series, utilize built-in memory or different SD-card architectures and do not support the 1756-M2.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine, brand-new unit since the module is discontinued?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We guarantee the 1756-M2 as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% brand new and original\u003c\/strong\u003e. We source these from factory-sealed stocks to ensure you receive a unit with zero previous runtime, meeting all E-E-A-T procurement standards for mission-critical industrial spares.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the installation of the 1756-M2 require software configuration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe RSLogix 5000 software automatically detects the additional memory once you install the module and cycle power. You must verify that your controller project properties reflect the increased memory capacity to utilize the additional 1 MB for user tags and logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat precautions should I take during installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAlways power down the ControlLogix chassis before inserting the 1756-M2 into the controller. Observe standard ESD (Electrostatic Discharge) protocols by wearing a grounding strap, as memory chips remain highly sensitive to static damage during handling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52562798182709,"sku":"1756-M2","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1756-M2.jpg?v=1776067279","url":"https:\/\/www.5gplc.com\/products\/1756-m2-allen-bradley-controllogix-1-mb-expansion-memory-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}