{"product_id":"allen-bradley-1747-l551-c-slc-5-05-processor-module","title":"Allen-Bradley 1747-L551\/C SLC 5\/05 Processor Module","description":"\u003ch1\u003eAllen-Bradley 1747-L551\/C SLC 5\/05 Processor Module\u003c\/h1\u003e\n\u003cp\u003eConfigured for Ethernet-based distributed control and cyclic task execution in SLC 500 network architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1747-L551\/C\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1747-L551\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSLC 5\/05 processor module) provides direct CPU-level execution for scan-based logic processing and plant-wide data exchange within RSLogix 500 runtime environments.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eNo validated manufacturer-documented suffix decomposition beyond catalog revision identifier \"\/C\". The base functional definition remains SLC 5\/05 CPU variant 1747-L551 within SLC 500 platform.\u003c\/p\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\/C\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\u003eScan Time\u003c\/td\u003e\n\u003ctd\u003e0.9 ms\/K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEtherNet\/IP Deterministic Network Execution Layer\u003c\/h3\u003e\n\u003cp\u003eThe 1747-L551\/C implements Ethernet-based cyclic communication alongside legacy serial channels. Ethernet stack behavior is mapped to processor scan cycles, enabling synchronized data exchange with remote I\/O adapters and supervisory nodes. Network determinism is dependent on scan execution timing and backplane scheduling of I\/O updates.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1747-L551\/C support hot-swapping in an active SLC chassis?\u003cbr\u003eA: The CPU module does not support live insertion during system operation. Power cycle is required prior to replacement to avoid backplane bus interruption.\u003c\/p\u003e\n\u003cp\u003eQ: What is the backplane load behavior during maximum I\/O utilization?\u003cbr\u003eA: Backplane current draw is distributed across chassis slots; CPU load remains fixed at approximately 4 W, while I\/O modules define total system backplane consumption.\u003c\/p\u003e\n\u003cp\u003eQ: Is firmware update via Ethernet supported on this CPU?\u003cbr\u003eA: Firmware updates are executed through RSLogix 500 via Ethernet or serial connection. In-field flash operations require stable communication session and uninterrupted power.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module into an SLC 500 chassis slot with system power removed. Ensure backplane connectors are fully seated to maintain signal integrity across CPU and I\/O modules. Ethernet cabling must follow standard twisted-pair shielding practices with proper grounding at cabinet entry only. RS-232 links require controlled cable length to minimize noise coupling. Maintain separation between communication wiring and high-voltage conductors according to industrial panel routing standards.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43551821398106,"sku":"1747-L551\/C","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1747-L551B1.jpg?v=1782359822","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1747-l551-c-slc-5-05-processor-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}