{"product_id":"allen-bradley-1794-tb3k-flex-i-o-terminal-base-unit","title":"Allen-Bradley 1794-TB3K FLEX I\/O Terminal Base Unit","description":"\u003ch2\u003eAllen-Bradley 1794-TB3K FLEX I\/O Terminal Base Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1794-TB3K\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1794-TB3\u003c\/strong\u003e Terminal Base Unit, operates as a dedicated hardware component for field signal termination and module mounting within the Allen-Bradley FLEX I\/O system. It provides a 3-wire cage-clamp interface with I\/O, Common, and Voltage terminals for direct field device connection.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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-TB3K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003eFLEX I\/O Terminal Base Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination Type\u003c\/td\u003e\n\u003ctd\u003eCage-clamp screw terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Configuration\u003c\/td\u003e\n\u003ctd\u003e16 I\/O terminals, 18 Common terminals, 18 Voltage terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003e125 V AC \/ DC max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Capacity\u003c\/td\u003e\n\u003ctd\u003e10 A max through power bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Size Range\u003c\/td\u003e\n\u003ctd\u003e0.34 to 2.5 mm2 (22 to 12 AWG) solid or stranded copper wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Screw Torque\u003c\/td\u003e\n\u003ctd\u003e0.8 Nm (7 lb-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Options\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN rail or panel\/wall mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.51 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e94 x 94 x 69 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Feature\u003c\/td\u003e\n\u003ctd\u003eConformal coated circuit board protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Interface\u003c\/td\u003e\n\u003ctd\u003eFLEX I\/O backplane connector and module keying interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFLEX I\/O Backplane and Modular Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1794-TB3K uses the FLEX I\/O modular terminal base architecture to provide electrical termination and mechanical support for compatible FLEX I\/O modules. The terminal base connects adjacent units through backplane connectors, allowing module-level communication through the FLEX I\/O system bus. Mechanical keying prevents installation of incompatible module types. The conformal coating designation provides additional protection for internal circuitry against moisture, dust, and airborne contaminants.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1794-TB3K provide direct I\/O signal termination without external terminal blocks?\u003cbr\u003eA: Yes. The terminal base provides direct field wiring termination through integrated cage-clamp screw terminals.\u003c\/p\u003e\n\u003cp\u003eQ: What wiring connections are available on the 1794-TB3K?\u003cbr\u003eA: The unit provides separate terminal groups for I\/O signals, Common connections, and Voltage connections using a 3-wire termination layout.\u003c\/p\u003e\n\u003cp\u003eQ: Is the 1794-TB3K compatible with standard FLEX I\/O module installation procedures?\u003cbr\u003eA: Yes. The unit uses the FLEX I\/O modular mounting interface with backplane connection and mechanical keying features.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1794-TB3K on a suitable 35 mm DIN rail or approved panel mounting surface. Maintain correct module alignment with the mechanical keying position before inserting a FLEX I\/O module.\u003c\/p\u003e\n\u003cp\u003eTerminate field wiring according to the assigned I\/O, Common, and Voltage terminal locations. Use appropriate conductor preparation methods for solid or stranded copper wiring and verify terminal clamping after installation.\u003c\/p\u003e\n\u003cp\u003eRoute signal wiring separately from high-current power conductors to reduce electrical interference. Apply standard industrial grounding practices and ensure cable shields are terminated according to the control system installation requirements.\u003c\/p\u003e\n\u003cp\u003eVerify the terminal base connector engagement with adjacent FLEX I\/O bases before system power application. Confirm environmental conditions remain within the specified operating temperature range.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43783186350170,"sku":"1794-TB3K","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1794-TB3K2.jpg?v=1785825913","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1794-tb3k-flex-i-o-terminal-base-unit","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}