{"product_id":"allen-bradley-1794-tbnf-flex-i-o-fused-terminal-base-unit","title":"Allen-Bradley 1794-TBNF FLEX I\/O Fused Terminal Base Unit","description":"\u003cp\u003eConfigured for field termination and module interface execution in FLEX I\/O network architectures, the \u003cstrong\u003eAllen-Bradley 1794-TBNF\u003c\/strong\u003e (\u003cstrong\u003e1794-TBNF\u003c\/strong\u003e Fused Terminal Base Unit) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003e1794-TBNF\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 lbs (0.20 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard FLEX I\/O footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e250 VAC\/DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003e10 A max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Size\u003c\/td\u003e\n\u003ctd\u003e22-12 AWG (0.35-2.5 mm sq)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Capacity\u003c\/td\u003e\n\u003ctd\u003e16 I\/O Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Terminals\u003c\/td\u003e\n\u003ctd\u003e2 Common Terminals, 2 +Voltage Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination Type\u003c\/td\u003e\n\u003ctd\u003eScrew Clamp (Fused)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Format\u003c\/td\u003e\n\u003ctd\u003eDIN-rail \/ Panel Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and Signal Distribution\u003c\/h3\u003e\n\u003cp\u003eThe 1794-TBNF terminal base establishes the direct backplane interconnect pathway and power distribution layer for 16-point FLEX I\/O modules. Designed with integral fusion on the I\/O circuits, the terminal arrangement maintains high backplane bus communication velocity across adjacent base units while isolating field-side overcurrent fault conditions. Internal signal paths clamp transient noise to ensure deterministic EtherNet\/IP and ControlNet data updates between installed I\/O hardware and host automation processors.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does removing the digital or analog module installed on the 1794-TBNF disrupt backplane bus continuity to adjacent units?\u003c\/p\u003e\n\u003cp\u003eA: No. The 1794-TBNF terminal base carries the internal backplane bus pass-through structure, allowing removal and insertion under power (RIUP) of the active I\/O module without interrupting communications across the remaining FLEX I\/O rail.\u003c\/p\u003e\n\u003cp\u003eQ: What size fuse is supported by the 1794-TBNF terminal base structure?\u003c\/p\u003e\n\u003cp\u003eA: The base accommodates standard 5 x 20 mm blown-fuse indicator fuses rated up to the maximum 10 A continuous current limit of the terminal strip assembly.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSnap the terminal base onto a 35 mm DIN rail, ensuring the rear locking latch snaps securely into place against the rail.\u003c\/li\u003e\n\u003cli\u003eInterlock adjacent terminal bases by sliding them laterally until the backplane bus connectors align and seat fully.\u003c\/li\u003e\n\u003cli\u003eWire field devices to the 16 screw-clamp I\/O terminals using 22-12 AWG copper conductors, applying a maximum terminal screw torque of 0.8 Nm (7 lb-in).\u003c\/li\u003e\n\u003cli\u003eConnect incoming system power supply lines to the 2 +Voltage and 2 Common power rail terminals to establish sensor supply buses.\u003c\/li\u003e\n\u003cli\u003eVerify that the DIN-rail grounding shoe maintains clean, paint-free metallic contact with an earth-grounded enclosure rail.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48761452396734,"sku":"1794-TBNF","price":83.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1794-TB3TS92_eec6d3cc-6330-42f6-a086-df6a66fcff06.png?v=1787197931","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1794-tbnf-flex-i-o-fused-terminal-base-unit","provider":"AutoOilTech Limited","version":"1.0","type":"link"}