{"product_id":"1794-of4i-flex-i-o-4-channel-isolated-analog-output-module-allen-bradley","title":"1794-OF4I | FLEX I\/O 4-Channel Isolated Analog Output Module | Allen-Bradley","description":"\u003ch3\u003e\u003cstrong\u003eFunctional Performance and System Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-OF4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance analog expansion module designed for the Allen-Bradley FLEX I\/O platform. It provides four fully isolated channels for precise control of field devices such as actuators, valves, and motor drives. By utilizing channel-to-channel isolation, this module effectively eliminates ground loop interference and protects the internal FlexBus logic from field-side electrical noise. Its modular design allows it to interface with a variety of terminal bases, providing flexibility in wiring and grounding strategies for complex industrial control architectures.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDetailed Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-OF4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis engineered for precision signal reproduction and robust thermal management in demanding environments.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Configuration\u003c\/strong\u003e: 4 individually isolated analog channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFlexBus Parameters\u003c\/strong\u003e: 5V DC supply voltage at a 50 mA current draw.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExternal Power Requirements\u003c\/strong\u003e: 24V DC nominal (Acceptable range 19.2 to 31.2V DC, including 5% AC ripple).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e: 210 mA @ 24V DC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnergy Dissipation\u003c\/strong\u003e: Maximum power dissipation of 4.7 W; Thermal dissipation rated at 16 BTU\/hr @ 31.2V DC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIsolation Capabilities\u003c\/strong\u003e:\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e120V continuous (Basic Insulation) with 1794-TB2, TB3, TB3S, TB3T, TB3TS.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e250V continuous (Basic Insulation) when paired with 1794-TBN base.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDielectric withstand type-tested at 1000V AC for 60 seconds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDigital Data Formats\u003c\/strong\u003e: 2’s Complement, 2’s Complement %, Binary, and Offset Binary.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical Interface\u003c\/strong\u003e: Module installs into keyswitch position 4 on the terminal base.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e: 94.0 x 94.0 x 66.0 mm (3.7 x 3.7 x 2.6 in) when fully seated.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnvironmental Ratings\u003c\/strong\u003e: North American T4A and IEC T4 temperature codes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWiring and Terminal Base Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTo ensure signal integrity, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-OF4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequires shielded cabling on all signal ports (Category 2). It is compatible with a wide array of FLEX I\/O terminal bases including the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TB2\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TB3\u003c\/strong\u003e, and the high-isolation\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TBN\u003c\/strong\u003e. The choice of terminal base directly dictates the maximum continuous isolation voltage and the permissible wire gauge for field connections.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eEngineering FAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the status indicators on the front panel?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module features a bi-color LED (Red\/Green) that provides immediate diagnostic feedback on power status and internal module health.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module support current and voltage outputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-OF4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis typically used for both 0–20mA\/4–20mA current loops and ±10V voltage signals, depending on the software configuration and data format selected in the controller's I\/O tree.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the 1794-TBN base recommended for certain applications?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-TBN\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides a higher continuous isolation rating (250V), which is essential for applications where field devices are powered by separate circuits with significant potential differences relative to the system ground.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eModule Comparison: 1794-OF4I vs. 1794-OF4\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eUnlike the standard 1794-OF4, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1794-OF4I\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efeatures complete galvanic isolation between channels. This makes the \"I\" variant superior for applications where field sensors share a common environment but require separate, non-interfering signal paths to prevent cross-talk.\u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":52992434143416,"sku":"1794-OF4I","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1794-OF4I.jpg?v=1773307833","url":"https:\/\/www.globalpetroparts.com\/products\/1794-of4i-flex-i-o-4-channel-isolated-analog-output-module-allen-bradley","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}