{"product_id":"allen-bradley-1747-l551-b-slc-5-05-processor-module","title":"Allen-Bradley 1747-L551\/B SLC 5\/05 Processor Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1747-L551\/B SLC 5\/05 Processor Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1747-L551\/B\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1747-L551\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSLC 5\/05 processor module, operates as a dedicated CPU execution unit for scan-based logic processing and Ethernet-enabled I\/O image management within SLC 500 backplane controller systems.\u003c\/p\u003e\n\u003cp\u003eConfigured for Ethernet-based cyclic control execution across SLC 5\/05 architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1747-L551\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1747-L551\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCPU processor module) provides deterministic instruction processing with 64K-word memory and TCP\/IP communication integration for distributed industrial control networks.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe suffix “\/B” denotes a hardware revision within the 1747-L551 SLC 5\/05 family. No functional partition or architectural variation is defined in the provided dataset. Core execution behavior, memory mapping, and Ethernet stack implementation remain consistent with SLC 5\/05 baseline design.\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-L551\/B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.31 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e~4 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003e64K words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Digital I\/O\u003c\/td\u003e\n\u003ctd\u003e8192\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Analog I\/O\u003c\/td\u003e\n\u003ctd\u003e480\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003eRS-232, Ethernet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Protocol\u003c\/td\u003e\n\u003ctd\u003eTCP\/IP over Ethernet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Type\u003c\/td\u003e\n\u003ctd\u003eSLC 500 \/ SLC 5\/05\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eEthernet Backplane Communication \u0026amp; I\/O Deterministic Mapping\u003c\/h3\u003e\n\u003cp\u003eWithin the\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003eRockwell Automation\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eSLC 500 architecture, the 1747-L551\/B executes cyclic scan processing while maintaining synchronized backplane I\/O image tables and Ethernet-based communication channels. The processor integrates TCP\/IP stack execution over Ethernet, enabling remote access to program memory, diagnostics, and distributed control data.\u003c\/p\u003e\n\u003cp\u003eBackplane bus communication is executed in deterministic scan cycles (~0.9 ms\/K instruction typical), where 64K-word memory is processed sequentially through instruction execution logic. Ethernet and RS-232 channels operate in parallel, separating local programming traffic from plant-level data exchange.\u003c\/p\u003e\n\u003cp\u003eI\/O density scaling supports up to 8192 digital and 480 analog points across 3 chassis \/ 30 slots, with centralized image table synchronization ensuring deterministic update consistency across expansion racks and remote I\/O nodes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1747-L551\/B support Ethernet programming and monitoring simultaneously with control execution?\u003cbr\u003eA: Yes. Ethernet TCP\/IP communication operates independently of scan execution and does not interrupt cyclic logic processing.\u003c\/p\u003e\n\u003cp\u003eQ: Can the processor operate across multiple chassis configurations?\u003cbr\u003eA: Yes. The system supports up to 3 chassis or 30 slots with centralized I\/O image table synchronization.\u003c\/p\u003e\n\u003cp\u003eQ: Is hot-swapping supported for the CPU module?\u003cbr\u003eA: No. CPU replacement requires full system power removal to maintain backplane integrity and memory consistency.\u003c\/p\u003e\n\u003chr\u003e\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eInstall CPU module into SLC 500 chassis slot with full backplane connector engagement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure chassis power is isolated before installation or removal of processor module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain shielded separation between Ethernet\/RS-232 cables and high-voltage field wiring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify IP addressing and communication configuration before network commissioning.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain proper chassis grounding to stabilize backplane reference potential.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConfirm Flash EEPROM program integrity prior to startup sequence. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43551819563098,"sku":"1747-L551\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1747-L551B2.jpg?v=1782359822","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1747-l551-b-slc-5-05-processor-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}