{"product_id":"allen-bradley-1747-m1-memory-device","title":"Allen-Bradley 1747-M1 Memory Device","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1747-M1 Memory Device\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1747-M1\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1747-M1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMemory Device, operates as a dedicated hardware component for program and data table storage within the SLC 500 architecture.\u003c\/p\u003e\n\u003cp\u003eConfigured for non-volatile program retention in SLC 500 controller environments, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1747-M1 (1747-M1 Memory Device)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides direct EEPROM-based execution support for program\/data table storage and controller memory backup operations across SLC chassis configurations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1747: SLC 500 chassis family identifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eM1: EEPROM memory module designation for program and data retention functions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo further factory-defined suffix segmentation is available for this single-part configuration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1747-M1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eMemory Device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Type\u003c\/td\u003e\n\u003ctd\u003eEEPROM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003e8 kilobytes \/ 1,000 instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Memory\u003c\/td\u003e\n\u003ctd\u003e64,000 words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgram Scan Time\u003c\/td\u003e\n\u003ctd\u003e0.9 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Scan Time\u003c\/td\u003e\n\u003ctd\u003e0.225 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication\u003c\/td\u003e\n\u003ctd\u003eEthernet, RS-232\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Chassis Support\u003c\/td\u003e\n\u003ctd\u003e3 chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Slot Capacity\u003c\/td\u003e\n\u003ctd\u003e30 slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e5.1 cm x 2.5 cm x 2.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.22 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003ePLC Backplane Memory Transaction Behavior (Allen-Bradley SLC Architecture)\u003c\/h3\u003e\n\u003cp\u003eThe 1747-M1 memory device integrates into the SLC 500 backplane environment where memory operations are synchronized with controller scan cycles. Within this architecture, backplane bus communication velocity governs the update consistency between EEPROM storage blocks and CPU execution cycles.\u003c\/p\u003e\n\u003cp\u003eThe module operates independently of field I\/O traffic and does not participate in deterministic EtherNet\/IP process data exchange. Firmware-level compatibility is governed by SLC 5\/01 and SLC 5\/02 controller memory mapping constraints, with EEPROM write cycles executed under non-real-time background scheduling to prevent scan time interference.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 1747-M1 support hot-swap in a live SLC 500 chassis?\u003c\/strong\u003e\u003cbr\u003eA: No. Memory device insertion or removal requires controller power down to prevent EEPROM corruption and backplane addressing errors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is program retention affected by backplane voltage fluctuation?\u003c\/strong\u003e\u003cbr\u003eA: The EEPROM storage is non-volatile; however, unstable backplane conditions during write cycles may result in incomplete memory commit states.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the module be used across different SLC CPU generations?\u003c\/strong\u003e\u003cbr\u003eA: It is compatible with SLC 5\/01 and SLC 5\/02 controllers only, based on firmware and memory mapping constraints.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure controller chassis power is fully disconnected before insertion or removal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAlign module correctly with SLC 500 backplane connector before seating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvoid electrostatic discharge during handling; use grounded wrist strap\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify controller firmware compatibility prior to memory transfer operations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not force insertion; mechanical misalignment can damage backplane pins\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAfter installation, perform memory verification via controller diagnostics routine\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43552135348314,"sku":"1747-M1","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1747-M12.jpg?v=1782370391","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1747-m1-memory-device","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}