{"product_id":"allen-bradley-1756-a17-controllogix-chassis","title":"Allen-Bradley 1756-A17 ControlLogix Chassis","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-A17 ControlLogix Chassis\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-A17\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-A17\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eControlLogix chassis, operates as a dedicated hardware component for modular backplane interconnection and power distribution within ControlLogix rack systems. Configured for 17-slot module accommodation, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-A17\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides direct physical\/electrical execution of backplane communication, enabling synchronized data exchange and power routing across installed PLC, I\/O, and communication modules in a single chassis structure.\u003c\/p\u003e\n\u003cp\u003eThe chassis implements a shared ControlLogix backplane architecture with defined current distribution across 5.1 VDC and 24 VDC rails, supporting deterministic module-level coordination across all 17 slots.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe model designation “1756-A17” defines a ControlLogix chassis series (1756), with “A17” indicating a 17-slot rack configuration. No additional functional suffix segmentation is defined by the manufacturer.\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\u003e1756-A17\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\u003e2.27 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePLC Chassis Racks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlots\u003c\/td\u003e\n\u003ctd\u003e17 slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eTop and bottom mounting tabs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1 VDC)\u003c\/td\u003e\n\u003ctd\u003e15 A chassis \/ 6 A per slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e2.8 A chassis \/ 2.8 A per slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Type\u003c\/td\u003e\n\u003ctd\u003eOpen-style chassis rack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastening Hardware\u003c\/td\u003e\n\u003ctd\u003ePhillips screws, SEM screws, flat\/star\/split lock washers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Power and I\/O Slot Distribution Behavior\u003c\/h3\u003e\n\u003cp\u003eWithin the ControlLogix architecture, the 1756-A17 chassis provides a unified backplane bus where all 17 slots share deterministic electrical and communication pathways. The 5.1 VDC rail supports core logic and backplane signaling, while the 24 VDC rail distributes auxiliary module power. Slot-based current allocation is enforced to maintain stable backplane loading during mixed module configurations, including I\/O, CPU, and communication cards.\u003c\/p\u003e\n\u003cp\u003eThe chassis design ensures mechanical stability through dual mounting tabs (top and bottom), maintaining alignment integrity under multi-module load conditions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 1756-A17 support hot-swapping of modules?\u003c\/strong\u003e\u003cbr\u003eA: Yes. ControlLogix architecture supports hot-swapping. However, electrical transients on the backplane must be considered when inserting or removing high-load modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is backplane current isolated between slots?\u003c\/strong\u003e\u003cbr\u003eA: No. The backplane is a shared electrical bus. Current is distributed across all slots within defined chassis and per-slot limits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can all 17 slots be populated simultaneously at maximum load?\u003c\/strong\u003e\u003cbr\u003eA: No. Total system loading must respect chassis-level current limits on 5.1 VDC and 24 VDC rails to avoid backplane overdraw.\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\u003eInstall chassis using both top and bottom mounting tabs to ensure mechanical stability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUse approved Phillips or SEM screws with appropriate flat\/star\/split lock washers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintain grounding continuity between chassis and cabinet earth bar before energization\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eVerify backplane connector alignment prior to module insertion to avoid pin damage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDistribute high-current modules across slots to prevent localized rail saturation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnsure adequate cabinet clearance for open-style chassis airflow and wiring access\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43568905748570,"sku":"1756-A17","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-A172.jpg?v=1782703605","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-a17-controllogix-chassis","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}