{"product_id":"allen-bradley-1794-tb3-125v-ac-dc-flex-i-o-mounting-base","title":"Allen Bradley 1794-TB3 | 125V AC\/DC Flex I\/O Mounting Base","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1794-TB3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as the essential mounting and wiring foundation for the Flex I\/O system. This terminal base unit provides the physical interface and electrical connection point for 1794 I\/O modules, enabling seamless communication with the FLEXBus backplane. Designed with a 3-wire cage-clamp termination system, the 1794-TB3 streamlines field wiring for sensors and actuators. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, ensuring high-integrity signal routing and robust power distribution for distributed control architectures in automotive, water treatment, and material handling industries.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen Bradley (Rockwell Automation)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1794-TB3\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFlex I\/O\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTermination Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCage-Clamp (3-Wire)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFLEXBus Voltage\/Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5V DC, 640 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eV\/COM Terminal Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125V AC\/DC (Maximum)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eV\/COM Current Capacity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10 Amps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTerminal Screw Torque\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.56 to 0.79 Nm (5 to 7 lb-in)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125 Volts (Continuous)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20 °C to +70 °C (-4 °F to 158 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHorizontal or Vertical DIN Rail\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.26 kg (0.56 lbs)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified 3-Wire Termination:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1794-TB3 features a specialized 3-wire cage-clamp design. This allows engineers to terminate the signal, power (V), and common (COM) wires directly on the base for each I\/O point, eliminating the need for external terminal strips and reducing cabinet clutter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModular \"Hot Swap\" Capability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe terminal base remains stationary while the I\/O module plugs into the center. This design allows for \"Removal and Insertion Under Power\" (RIUP), meaning maintenance teams can replace a faulty I\/O module without disconnecting field wiring or shutting down the entire system bus.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Voltage Versatility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike standard low-voltage bases, the 1794-TB3 supports up to 125V AC\/DC on the V\/COM terminals. This enables the integration of higher voltage field devices—such as 120V AC solenoids or relay coils—directly into the Flex I\/O assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSpace-Saving DIN Rail Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe compact form factor and integrated DIN rail latching mechanism allow for high-density mounting. The base unit creates the backplane connection automatically when slid alongside adjacent units, significantly reducing assembly time during cabinet builds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the benefit of the Cage-Clamp over standard Screw-Terminals?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe cage-clamp system in the 1794-TB3 provides a constant spring-force connection. Unlike traditional screws that can loosen over time due to machine vibration, the cage-clamp maintains a secure, gas-tight seal on the wire, significantly reducing long-term maintenance requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 1794-TB3 come with the I\/O module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The 1794-TB3 is a standalone terminal base unit. You must purchase the specific Flex I\/O module (e.g., 1794-IB16 or 1794-OB16) separately. This modularity allows you to mix and match different I\/O types on the same base platform.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the 1794-TB3 for analog modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile the 1794-TB3 is primarily used for digital I\/O due to its 3-wire layout, some analog modules are compatible. However, for high-precision analog signals requiring shielded twisted pairs, we recommend checking the specific 1794 analog module's manual to ensure the TB3 provides sufficient grounding points.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size wire does the cage-clamp accommodate?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1794-TB3 cage-clamps typically accept wire sizes ranging from 0.34\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$mm^2$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eto 2.5\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$mm^2$\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e(22 to 12 AWG) solid or stranded copper wire, providing flexibility for various industrial wiring standards.\u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":43360007290970,"sku":"1794-TB3","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/15._ebb8cdb8-a616-4399-8c83-904dc161a2f8.jpg?v=1778642753","url":"https:\/\/www.spareoil.com\/products\/allen-bradley-1794-tb3-125v-ac-dc-flex-i-o-mounting-base","provider":"SpareOil Automation","version":"1.0","type":"link"}