{"product_id":"allen-bradley-1756-m1-controllogix-memory-expansion-board","title":"Allen-Bradley 1756-M1 ControlLogix Memory Expansion Board","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe 1756-M1 is a high-integrity volatile memory expansion board designed for the early-generation Allen-Bradley ControlLogix 5550 processing platform. This hardware component functions as a direct physical RAM extension, providing 512 Kilobytes of additional volatile memory for storing instruction logic, data arrays, and system trend profiles. It is engineered to support legacy manufacturing systems, including automotive assembly lines, chemical processing, and printing press configurations, by preventing memory overflow and extending the operational lifecycle of existing controller hardware.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProvides 512 KB of additional volatile memory capacity.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for integration with 1756-L1 series ControlLogix processors.\u003c\/li\u003e\n\u003cli\u003eCompact daughterboard architecture for direct internal mounting.\u003c\/li\u003e\n\u003cli\u003eMaintains system reliability in demanding industrial environments.\u003c\/li\u003e\n\u003cli\u003eSupports legacy system maintenance without requiring full processor replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis memory expansion board is intended for use in legacy ControlLogix 5550 automation environments where additional memory is required for complex logic or large data sets. Typical applications include automotive assembly, material handling, and chemical processing facilities utilizing 1756-L1 series controllers.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-M1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003e512 Kilobytes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003e1756-L1, 1756-L1M1, 1756-L1M2, 1756-L1M3\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\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e21.2 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1 VDC)\u003c\/td\u003e\n\u003ctd\u003e760 mA (1.2 A peak)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e2.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5 to 95 percent (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Vibration\u003c\/td\u003e\n\u003ctd\u003e2 g at 10 to 500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Shock\u003c\/td\u003e\n\u003ctd\u003e30 g\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 powered down before attempting to install or remove the memory board.\u003c\/li\u003e\n\u003cli\u003eThis module is an open-style component; handle with care to avoid damage to internal circuitry.\u003c\/li\u003e\n\u003cli\u003eStrict adherence to ESD (Electrostatic Discharge) protocols is required; use a grounded wrist strap during handling.\u003c\/li\u003e\n\u003cli\u003eMount the daughterboard securely onto the main circuit assembly of the host controller using a number 2 Phillips screwdriver.\u003c\/li\u003e\n\u003cli\u003eEnsure only one memory expansion board is installed per individual processor module.\u003c\/li\u003e\n\u003cli\u003eVerify that the host module is correctly seated in the ControlLogix chassis before applying power.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eIs this board compatible with modern ControlLogix processors?\u003c\/h3\u003e\u003cp\u003eNo, the 1756-M1 is specifically engineered for the early-generation 1756-L1 series ControlLogix 5550 processors and is not compatible with newer ControlLogix controller models.\u003c\/p\u003e\u003ch3\u003eCan I install multiple 1756-M1 boards in one processor?\u003c\/h3\u003e\u003cp\u003eNo, the hardware architecture limits installation to exactly one memory expansion board per individual processor module.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":50986550165756,"sku":"1756-M1","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_f37a71af-d887-4b53-940f-085c853dc952.jpg?v=1786822568","url":"https:\/\/www.electronicplc.com\/es\/products\/allen-bradley-1756-m1-controllogix-memory-expansion-board","provider":"Electronic PLC","version":"1.0","type":"link"}