{"product_id":"allen-bradley-1794-tb3ts-terminal-base-assemblies","title":"Allen-Bradley 1794-TB3TS Terminal Base Assemblies","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1794-TB3TS\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1794-TB3TS\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-TB3TS\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\u003e1.44 lbs (0.65 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\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e125 VAC\/DC max\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 to 12 AWG (0.35 to 2.5 mm sq)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eSpring Clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Support\u003c\/td\u003e\n\u003ctd\u003eCold Junction Compensation (CJC)\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\u003e10 Common Terminals, 4 +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\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\u003eCold Junction Compensation and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe 1794-TB3TS terminal base integrates built-in Cold Junction Compensation (CJC) sensors designed for high-accuracy thermocouple and temperature I\/O module processing. Internal trace layout ensures stable channel-to-channel isolation while routing 16 field signals directly into the FLEX I\/O backplane bus. Designed to maintain signal fidelity in high-density analog node layouts, the base unit preserves high backplane bus communication velocity and eliminates thermal gradient errors across field terminal contacts.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does removing the active temperature module installed on the 1794-TB3TS disrupt backplane communications to adjacent nodes?\u003c\/p\u003e\n\u003cp\u003eA: No. The internal backplane communication logic and pass-through bus reside permanently within the 1794-TB3TS base assembly, enabling Removal and Insertion Under Power (RIUP) of the module without interrupting system operation.\u003c\/p\u003e\n\u003cp\u003eQ: What are the advantages of the spring-clamp termination design on the 1794-TB3TS?\u003c\/p\u003e\n\u003cp\u003eA: Spring-clamp connections provide continuous gas-tight holding force on 22 to 12 AWG wiring, eliminating terminal loosening caused by thermal expansion or high-vibration field environments.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eLatch the terminal base securely onto a standard 35 mm DIN rail, verifying that the mechanical locking mechanism engages completely.\u003c\/li\u003e\n\u003cli\u003eSlide the unit firmly against adjacent FLEX I\/O adapter or terminal base modules to fully seat the backplane expansion connectors.\u003c\/li\u003e\n\u003cli\u003eInsert strip conductors into the spring-clamp terminals using a flat-head screwdriver to actuate the spring mechanism, accommodating 22 to 12 AWG field wiring.\u003c\/li\u003e\n\u003cli\u003eRoute temperature and analog signal cables away from high-voltage AC power lines to maintain thermocouple CJC measurement precision.\u003c\/li\u003e\n\u003cli\u003eVerify that the DIN-rail grounding foot makes clean, unpainted metallic contact with an earth-grounded steel DIN rail.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48761471402174,"sku":"1794-TB3TS","price":83.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1794-TB3TS.png?v=1787197846","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1794-tb3ts-terminal-base-assemblies","provider":"AutoOilTech Limited","version":"1.0","type":"link"}