{"product_id":"1794-tbn-allen-bradley-terminal-base-unit-flex-i-o","title":"1794-TBN Allen-Bradley Terminal Base Unit FLEX I\/O","description":"\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1794-TBN\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TBN\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTerminal Base Unit, operates as a dedicated hardware component for physical field wiring termination and mechanical support within FLEX I\/O platforms. The assembly provides electrical pathways that route discrete or analog signals from field devices to active processor processing modules while maintaining structural isolation parameters on the DIN cluster.\u003c\/p\u003e\n\u003ch3\u003eStructural Connection Topology\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e16 I\/O Terminals: Primary connection points for field-side sensor and actuator signaling loops.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2 Common Terminals: Internal return baseline routing for circuit loop validation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2 +Voltage Terminals: Dedicated distribution points for external field-side excitation voltage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware 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\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1794-TBN\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOrigin\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModule Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTerminal Base Unit\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTermination Density\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16 I\/O points, 2 Common, 2 +Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTerminal Clamp Mechanism\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eScrew-clamp terminals\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIngress Protection\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP20\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMounting Base Style\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOpen style, DIN mount\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20 to +55 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Consumption\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePassive electrical bus pass-through\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTariff Code\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8537101190\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eShipping Dimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e9.4 cm x 9.5 cm x 4.8 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.14 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Integration \u0026amp; Density Scaling\u003c\/h3\u003e\n\u003cp\u003eThe device routes data distribution lines through built-in interface contacts, enabling adjacent units to integrate directly across Profinet \/ EtherNet\/IP deterministic networks. This connection style eliminates the requirement for separate backplane bus communication velocity licenses. The passive layout facilitates flexible I\/O density scaling while ensuring total firmware flash compatibility for any attached active digital or analog conversion modules during system operational runtime.\u003c\/p\u003e\n\u003ch3\u003eLogistics Package Contents\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1 Allen-Bradley 1794-TBN Terminal Base Unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 Terminal Label Mapping Strip\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003ch4\u003eMechanical DIN-Rail Fastening\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003ePosition the terminal base vertically over a standard 35 mm DIN rail and snap it firmly into place. Slide the base to align with adjacent units until the internal male\/female bus connectors mate fully.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTurn the integrated mechanical keyswitch to the designated alignment position corresponding to the intended I\/O module profile before module insertion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWiring and Termination Protocols\u003c\/h4\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eStrip field-side conductor jackets to the manufacturer recommended length and insert the wires cleanly into the screw-clamp terminal channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRoute high-current AC lines separate from low-voltage DC signaling paths within the enclosure wire ducts to prevent crosstalk interference.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this passive unit require any microprocessor initialization or firmware flash updates?\u003c\/p\u003e\n\u003cp\u003eNo, this assembly consists of passive electrical conductors and structural mechanical tracking, requiring no digital programming or configuration changes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the removal of active I\/O modules supported while this base unit remains powered?\u003c\/p\u003e\n\u003cp\u003eYes, the hardware layout permits hot-swapping of compatible functional modules without breaking backplane bus continuity to adjacent components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow are external power supplies distributed through the terminal arrangement?\u003c\/p\u003e\n\u003cp\u003eField auxiliary excitation loops hook directly into the 2 +Voltage and 2 Common terminals, creating shared power buses across the block.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the continuous current capacity rating for the internal backplane bus pass-through path?\u003c\/p\u003e\n\u003cp\u003eThe horizontal male-to-female backplane connectors are constructed to support standard FLEX I\/O current distributions without degradation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this model feature integrated branch circuit overcurrent fuse protection for the channels?\u003c\/p\u003e\n\u003cp\u003eNo, this unit is a standard direct pass-through terminal base; external fusing must be wired inline if channel protection is mandatory.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan stranded and solid core control wires be wired into the screw-clamp blocks?\u003c\/p\u003e\n\u003cp\u003eYes, the adjustable screw-clamp mechanisms secure solid or stranded industrial signal lines within the certified wire gauge range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this base structure consume any backplane bus communication velocity licenses?\u003c\/p\u003e\n\u003cp\u003eNo, because it does not operate a microprocessor or network processor, it consumes zero communication velocity licenses.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is electrical shield continuity managed for field instrument cables?\u003c\/p\u003e\n\u003cp\u003eSensor shield drains must bypass the internal wiring points and connect to a dedicated copper ground bar located within the main panel enclosure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066459541677,"sku":"1794-TBN","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1794-TBN-133.jpg?v=1784024754","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1794-tbn-allen-bradley-terminal-base-unit-flex-i-o","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}