{"product_id":"allen-bradley-1794-tb32-terminal-base-unit","title":"Allen-Bradley 1794-TB32 Terminal Base Unit","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1794-TB32\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1794-TB32\u003c\/strong\u003e FLEX I\/O Terminal Base Unit, operates as a dedicated hardware component for field signal termination and backplane bus routing within FLEX I\/O control systems.\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-TB32\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\u003e0.75 lbs (0.34 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\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e19.2 to 31.2 VDC (24 VDC nominal)\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\u003eFlexbus Output Current\u003c\/td\u003e\n\u003ctd\u003e640 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination Type\u003c\/td\u003e\n\u003ctd\u003eCage Clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Capacity\u003c\/td\u003e\n\u003ctd\u003e32 I\/O Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Terminals\u003c\/td\u003e\n\u003ctd\u003e8 Common Terminals, 8 +V Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003e57.6 kbps to 230 kbps\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 Backplane Bus Velocity\u003c\/h3\u003e\n\u003cp\u003eThe 1794-TB32 terminal base enables high I\/O density scaling by providing 32 I\/O field termination points alongside integrated 8 common and 8 +V power connections within a single compact footprint. Designed to supply up to 640 mA of Flexbus output current across 24 VDC nominal voltage paths, the internal architecture maintains deterministic backplane bus communication velocity across data rates from 57.6 kbps up to 230 kbps. Signal pathways feature 50 V continuous isolation to shield sensitive backplane logic circuits from transient field noise during high-speed parallel digital I\/O execution.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can high-density 32-point modules mounted on the 1794-TB32 be hot-swapped during active system operation?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The 1794-TB32 houses the continuous internal backplane pass-through routing, permitting Removal and Insertion Under Power (RIUP) of the active 32-point I\/O module without breaking communication continuity across adjacent FLEX I\/O node units.\u003c\/p\u003e\n\u003cp\u003eQ: How are power expansion connections configured on the 1794-TB32 terminal base?\u003c\/p\u003e\n\u003cp\u003eA: The base unit contains 8 factory-bussed +V terminals and 8 common terminals, allowing direct 2-wire or 3-wire field device power distribution without requiring external terminal strips.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eLatch the terminal base unit securely onto an earth-grounded 35 mm DIN rail until the rear mounting spring engages completely.\u003c\/li\u003e\n\u003cli\u003ePush the base unit laterally against the adjacent FLEX I\/O adapter or base module to fully engage the female-to-male Flexbus connectors.\u003c\/li\u003e\n\u003cli\u003eWire field conductors to the 32 cage-clamp I\/O terminals and dedicated power rails, ensuring wire insulation is stripped to 9 mm (0.35 in).\u003c\/li\u003e\n\u003cli\u003eConnect the main 24 VDC field power supply across the primary power terminals, maintaining proper polarity within the 19.2 to 31.2 VDC operating range.\u003c\/li\u003e\n\u003cli\u003eVerify that the DIN-rail grounding foot makes clean, paint-free metallic contact with the enclosure rail surface to preserve internal isolation ratings.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48761482444990,"sku":"1794-TB32","price":83.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1794-TBN_38a26b04-06cf-4a09-bb18-3069881dd4df.png?v=1787197834","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1794-tb32-terminal-base-unit","provider":"AutoOilTech Limited","version":"1.0","type":"link"}