{"product_id":"allen-bradley-1794-tb3-flex-i-o-cage-clamp-terminal-base-unit","title":"Allen-Bradley 1794-TB3 FLEX I\/O Cage-Clamp Terminal Base Unit","description":"\u003cp\u003eConfigured for field termination and module interface execution in FLEX I\/O network architectures, the \u003cstrong\u003eAllen-Bradley 1794-TB3\u003c\/strong\u003e (\u003cstrong\u003e1794-TB3\u003c\/strong\u003e 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-TB3\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\u003e0.63 lbs (0.28 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard FLEX I\/O base footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive backplane load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexbus Voltage and Current\u003c\/td\u003e\n\u003ctd\u003e5 VDC, 640 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV\/COM Supply Voltage\u003c\/td\u003e\n\u003ctd\u003e125 VAC\/DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV\/COM Terminal Frequency\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV\/COM Terminal Current\u003c\/td\u003e\n\u003ctd\u003e10 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e125 V continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eOpen-Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamp Type\u003c\/td\u003e\n\u003ctd\u003eCage-Clamp\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\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\u003eI\/O Density Scaling and EtherNet\/IP Deterministic Networks\u003c\/h3\u003e\n\u003cp\u003eThe 1794-TB3 terminal base unit enables high I\/O density scaling across FLEX I\/O system layouts by providing 16 I\/O connections alongside 18 power\/common terminals. Internal routing pathways carry up to 640 mA of Flexbus current at 5 VDC to power attached operational hardware modules. Operating within EtherNet\/IP deterministic networks, the base unit's internal backplane pass-through structure maintains signal integrity and continuous data bus speed while providing 125 V continuous channel-to-bus isolation.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can an I\/O module be attached or removed from the 1794-TB3 while power is applied to the backplane?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The 1794-TB3 houses the complete backplane interconnect circuitry, supporting Removal and Insertion Under Power (RIUP) of the installed module without disrupting backplane communications across neighboring node bases.\u003c\/p\u003e\n\u003cp\u003eQ: What is the recommended tightening torque for the field terminal screws on the 1794-TB3?\u003c\/p\u003e\n\u003cp\u003eA: The cage-clamp terminal screws must be torqued to a range between 0.56 and 0.79 Nm (5 to 7 lb-in) to ensure stable, low-resistance electrical contact without stripping the terminal 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 steel DIN rail, ensuring the locking latch engages securely with the rail edge.\u003c\/li\u003e\n\u003cli\u003ePush the base unit firmly against the adjacent adapter or terminal base to establish complete connection across the 5 VDC Flexbus interface.\u003c\/li\u003e\n\u003cli\u003eStrip field conductors appropriately and insert them into the cage clamps, torquing screws precisely within the 0.56 to 0.79 Nm specification window.\u003c\/li\u003e\n\u003cli\u003eRoute power connections to the V\/COM terminals using copper conductors rated for 125 VAC\/DC up to 10 A continuous.\u003c\/li\u003e\n\u003cli\u003eVerify that the DIN-rail grounding contact makes unpainted, low-impedance connection with earth ground to maintain proper isolation integrity.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48761486409918,"sku":"1794-TB3","price":83.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1794-TBN_2.png?v=1787197823","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1794-tb3-flex-i-o-cage-clamp-terminal-base-unit","provider":"AutoOilTech Limited","version":"1.0","type":"link"}