{"product_id":"allen-bradley-1794-tb3-flex-i-o-terminal-base-unit","title":"Allen-Bradley 1794-TB3 FLEX I\/O Terminal Base Unit","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TB3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eterminal base unit is part of the Allen-Bradley FLEX I\/O distributed I\/O platform, designed to provide field wiring connections and module mounting for FLEX I\/O systems. The unit supports secure DIN rail installation and simplifies maintenance with removable I\/O modules and organized terminal layouts.\u003c\/p\u003e\n\u003cp\u003eBuilt for industrial control environments, the terminal base accommodates three-wire screw clamp wiring configurations and supports high-current field connections. Its open-style construction enables straightforward integration inside control panels and automation cabinets.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for Allen-Bradley FLEX I\/O modules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDIN rail mounting configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCage-clamp terminal connection system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports up to 10 A terminal current\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemovable terminal base architecture for simplified maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e16 I\/O terminal points with 18 common terminals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for 125V AC\/DC applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOpen-style enclosure for panel integration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReliable electrical isolation for industrial systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\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 Series\u003c\/td\u003e\n\u003ctd\u003eFLEX I\/O 1794\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eTerminal Base Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Number\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1794-TB3\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Method\u003c\/td\u003e\n\u003ctd\u003eDIN Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Connection Type\u003c\/td\u003e\n\u003ctd\u003eCage-Clamp \/ Screw Clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of I\/O Terminals\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Common Terminals\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Voltage Terminals\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFLEXBus Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFLEXBus Current Capacity\u003c\/td\u003e\n\u003ctd\u003e640 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV\/COM Supply Voltage\u003c\/td\u003e\n\u003ctd\u003e125V AC\/DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Rating\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Terminal Current\u003c\/td\u003e\n\u003ctd\u003e10 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Isolation Voltage\u003c\/td\u003e\n\u003ctd\u003e125 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Screw Torque\u003c\/td\u003e\n\u003ctd\u003e0.56 to 0.79 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to 70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to 85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Type\u003c\/td\u003e\n\u003ctd\u003eOpen Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.26 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eDesign and Installation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TB3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis engineered for modular FLEX I\/O assemblies where quick replacement and simplified field wiring are important. The base remains wired during module replacement, reducing system downtime and maintenance effort.\u003c\/p\u003e\n\u003cp\u003eIts cage-clamp terminal system provides stable electrical connections under vibration and fluctuating industrial conditions. The DIN rail mounting design supports compact cabinet layouts in distributed control systems.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eCommon installation environments include:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003ePLC remote I\/O stations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eManufacturing automation systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePackaging equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaterial handling systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProcess control panels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOEM machinery\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWater and wastewater facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePower generation auxiliary systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe terminal base is compatible with Allen-Bradley FLEX I\/O communication adapters and I\/O modules within the 1794 series platform. It is commonly used with analog, digital, and specialty FLEX I\/O modules.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat is the primary function of the 1794-TB3?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe unit serves as the wiring and mounting base for Allen-Bradley FLEX I\/O modules, providing field signal termination and FLEXBus connectivity.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eDoes the terminal base support DIN rail installation?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TB3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis designed specifically for standard DIN rail mounting applications.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat type of terminal connection is used?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe base utilizes cage-clamp screw terminals for secure industrial wiring connections.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCan the I\/O module be replaced without rewiring?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. FLEX I\/O modules can be removed and replaced while the terminal wiring remains connected to the base unit.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43334209175642,"sku":"1794-TB3","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1794-TB32.jpg?v=1778230364","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1794-tb3-flex-i-o-terminal-base-unit","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}