{"product_id":"1794-tbn-rockwell-automation-1794-series-a-terminal-block","title":"1794-TBN Rockwell Automation 1794 Series A Terminal Block","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1794-TBN\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as the foundational interface for the FLEX I\/O system, providing the essential mechanical mounting and electrical connection points for expansion modules. This NEMA-style screw-clamp terminal base supports high-voltage applications up to 250V AC\/DC and handles high-current distribution throughout the I\/O rack. We provide this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein factory packaging, ensuring precise mechanical alignment and superior electrical conductivity for your distributed control architecture.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Terminals\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e36 (18 points per side)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTerminal Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCage-style Screw Clarip\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250V AC\/DC (Maximum)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Capacity (V\/COM)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10A Maximum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Capacity (I\/O)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2A Maximum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFLEXBUS Throughput\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5V DC, 640 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250V Continuous (Basic Insulation)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTerminal Screw Torque\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.4 Nm (12 lb-in)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWire Size Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.34 to 2.5 mm² (22 to 14 AWG)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 55 °C (32 to 131 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.0 kg (Protective bulk shipping weight)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Voltage Versatility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1794-TBN supports voltages up to 250V AC, making it the standard choice for high-voltage digital modules like the 1794-IM8 or 1794-OM8. Its robust insulation safely segregates field power from the low-voltage Flexbus logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMechanical Keying System:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAn integrated keyed slot ensures that only compatible FLEX I\/O modules seat correctly into the base. This physical interlock prevents accidental insertion of the wrong module type, protecting sensitive electronics from incorrect voltage levels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSuperior Current Handling:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith a 10A rating on V\/COM terminals, this base handles heavy power distribution for multiple inductive loads. The cage-clamp design ensures maximum surface contact with the wire, reducing heat generation and preventing loose connections in high-vibration environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Troubleshooting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe organized 36-point layout provides dedicated space for signal, power, and common returns. This clear separation accelerates field wiring during installation and reduces diagnostic time during maintenance cycles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the primary difference between the 1794-TBN and the 1794-TB3?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1794-TBN uses a NEMA-style screw-clamp design and is specifically rated for higher voltage applications (up to 250V AC). While the 1794-TB3 is common for 24V DC signals, the 1794-TBN offers the robust isolation required for 120V or 240V AC power monitoring and control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace a module on this base while the system is powered?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 1794-TBN supports \"Removal and Insertion Under Power\" (RIUP). However, always ensure the field-side circuit is in a no-load condition before making or breaking connections to prevent electrical arcing, as the base itself does not include a disconnect switch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this base compatible with all FLEX I\/O modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1794-TBN is highly versatile, but you must check the \"Recommended Terminal Base\" section of your specific I\/O module’s manual. It is specifically required for modules that necessitate high-voltage isolation or higher torque screw terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat torque setting should I use for the field wiring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor reliable electrical contact and to prevent stripping the threads, tighten the terminal screws to exactly\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1.4 Nm (12 lb-in)\u003c\/strong\u003e. Proper torquing is critical in industrial environments to prevent intermittent signal loss due to vibration.\u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":43359731089498,"sku":"1794-TBN","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/13._198bdec7-43f4-4464-8962-dead22e720f9.jpg?v=1778640457","url":"https:\/\/www.spareoil.com\/products\/1794-tbn-rockwell-automation-1794-series-a-terminal-block","provider":"SpareOil Automation","version":"1.0","type":"link"}