{"product_id":"allen-bradley-1771-alx-plc-5-local-i-o-adapter-module","title":"Allen-Bradley 1771-ALX PLC-5 Local I\/O Adapter Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1771-ALX is a PLC-5 local I\/O adapter module engineered to interface local I\/O chassis within a 1771 I\/O architecture. Designed for installation in the leftmost slot of an I\/O chassis, this module manages communication across the local I\/O bus and allows individual racks to be disconnected without requiring a complete system shutdown. Its hot-disconnect capability ensures that interconnect cables can be removed for maintenance without disrupting bus communication to downstream chassis in the system.\u003c\/p\u003e\n\u003cp\u003eThe module features onboard configuration switches that must be matched with backplane settings for the specific application. It supports standard interconnect cabling options—such as the 1771-CX1, 1771-CX2, and 1771-CX5 cables—and requires the 1771-CXT terminator plug on the final adapter of the bus chain. Operating reliably within standard industrial automation environments, the 1771-ALX provides robust backplane management for legacy PLC-5 control systems.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for placement in the leftmost slot of a 1771 I\/O chassis\u003c\/li\u003e\n  \u003cli\u003eEnables disconnection of an individual I\/O rack from the bus without shutting down the entire system\u003c\/li\u003e\n  \u003cli\u003eSupports daisy-chaining up to 16 local I\/O adapters on the communication bus\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard 1771 interconnect cables (1771-CX1, 1771-CX2, 1771-CX5)\u003c\/li\u003e\n  \u003cli\u003eRequires Cat. No. 1771-CXT terminator plug on the final adapter in the bus sequence\u003c\/li\u003e\n  \u003cli\u003eConfigurable via integrated module switches matching backplane requirements\u003c\/li\u003e\n  \u003cli\u003eCompatible with all Allen-Bradley 1771 external or slot power supplies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLegacy Allen-Bradley PLC-5 industrial control systems\u003c\/li\u003e\n  \u003cli\u003eDistributed local I\/O chassis architectures\u003c\/li\u003e\n  \u003cli\u003eManufacturing and process automation lines requiring modular rack isolation\u003c\/li\u003e\n  \u003cli\u003eIndustrial plant retrofits and maintenance upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eParameter\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eManufacturer\u003c\/td\u003e\n      \u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eLocal I\/O Adapter Module\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Family\u003c\/td\u003e\n      \u003ctd\u003ePLC-5 (1771 I\/O)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCatalog Number\u003c\/td\u003e\n      \u003ctd\u003e1771-ALX\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n      \u003ctd\u003e1.2A at 5VDC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePower Dissipation\u003c\/td\u003e\n      \u003ctd\u003e5.7 to 6.3W\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n      \u003ctd\u003e19.44 to 21.48 BTU\/hr\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMax Chassis Distance\u003c\/td\u003e\n      \u003ctd\u003e98.4 cable-feet (30 meters cumulative bus length)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCompatible Interconnect Cables\u003c\/td\u003e\n      \u003ctd\u003e1771-CX1 (1m), 1771-CX2 (2m), 1771-CX5 (5m)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBus Terminator\u003c\/td\u003e\n      \u003ctd\u003eCat. No. 1771-CXT\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eModule Chassis Location\u003c\/td\u003e\n      \u003ctd\u003eLeft-most slot of 1771 I\/O chassis\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eKeying Positions\u003c\/td\u003e\n      \u003ctd\u003eUpper connector: between 54 and 56; Lower connector: between 4 and 6\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCountry of Origin\u003c\/td\u003e\n      \u003ctd\u003eUnited States\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eConnections \/ Interfaces\u003c\/h3\u003e\n\u003cp\u003eThe 1771-ALX module features physical ports for interconnect cabling to link adjacent 1771 I\/O chassis. Front-panel connections accommodate standard 1771 series multi-conductor communication cables. Switch blocks on the module must be precisely configured to match chassis rack addressing and communication parameters.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsure all system power to the chassis is turned off before installing or removing the 1771-ALX module, unless performing authorized hot-disconnect procedures on isolated cabling.\u003c\/li\u003e\n  \u003cli\u003eInstall the adapter strictly in the leftmost slot of the designated 1771 I\/O chassis.\u003c\/li\u003e\n  \u003cli\u003eVerify that physical keying on the module connectors matches the backplane slot keying to prevent incorrect module insertion.\u003c\/li\u003e\n  \u003cli\u003eSet the onboard configuration switches to correspond with your specific PLC-5 system architecture and rack addressing layout.\u003c\/li\u003e\n  \u003cli\u003eEnsure the final adapter on the bus is properly terminated using the 1771-CXT terminator plug.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53770307109227,"sku":"1771-ALX","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/1771-AL_1200x1200_a4590dd2-3b1d-4fd6-a919-10d79054094a.jpg?v=1787740888","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1771-alx-plc-5-local-i-o-adapter-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}