{"product_id":"allen-bradley-1794-of8ih-flex-i-o-isolated-analog-output-hart-module","title":"Allen-Bradley 1794-OF8IH Flex I\/O Isolated Analog Output HART Module","description":"\u003ch2\u003eAllen-Bradley 1794-OF8IH Flex I\/O Isolated Analog Output HART Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for isolated analog current output execution in the Flex I\/O 1794 system, the \u003cstrong\u003eAllen-Bradley 1794-OF8IH\u003c\/strong\u003e (\u003cstrong\u003e1794-OF8IH\u003c\/strong\u003e Flex I\/O Analog Output Module) provides direct physical\/electrical execution for 0-20 mA and 4-20 mA output signals with HART communication capability.\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-OF8IH\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eIsolated Analog Output HART Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003eFlex I\/O 1794\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e8 isolated single-ended outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signals\u003c\/td\u003e\n\u003ctd\u003e0-20 mA, 4-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16-bit unipolar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Method\u003c\/td\u003e\n\u003ctd\u003e16-bit digital-to-analog converter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Rate\u003c\/td\u003e\n\u003ctd\u003e10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eEngineering Units, Percent of Full Scale, RAW\/Proportional Count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Base\u003c\/td\u003e\n\u003ctd\u003e1794-TB3, 1794-TB3S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration\u003c\/td\u003e\n\u003ctd\u003eFactory calibrated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexBus Current\u003c\/td\u003e\n\u003ctd\u003e80 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMaximum 5.0 W @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003eMaximum 17.06 BTU\/hr @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e32 to 131 deg F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.35 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eDIN rail, open-style\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProfinet \/ EtherNet-IP Deterministic Control Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1794-OF8IH operates as an analog output component within the Allen-Bradley Flex I\/O architecture. The module receives digital output commands through the FlexBus interface and converts engineering data into isolated current signals through its internal 16-bit digital-to-analog conversion circuitry. The module supports configurable 0-20 mA and 4-20 mA output ranges and provides HART pass-through message support for connected field devices.\u003c\/p\u003e\n\u003cp\u003eThe module configuration supports I\/O density scaling within distributed Flex I\/O installations where multiple analog channels are required. The 80 mA @ 5 VDC FlexBus current consumption and 5.0 W maximum power dissipation must be considered during system power budget calculations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What output signal ranges are supported by the 1794-OF8IH?\u003cbr\u003eA: The module supports configurable isolated analog current outputs of 0-20 mA and 4-20 mA with 16-bit unipolar resolution.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module provide HART communication support?\u003cbr\u003eA: Yes. The 1794-OF8IH supports HART pass-through messaging for compatible field devices connected to its analog output channels.\u003c\/p\u003e\n\u003cp\u003eQ: What terminal bases are compatible with this module?\u003cbr\u003eA: The module is designed for installation with 1794-TB3 and 1794-TB3S terminal bases.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module on a compatible DIN rail assembly using the specified Flex I\/O terminal base. Verify that the terminal base wiring arrangement matches the required analog output channel configuration before applying power.\u003c\/p\u003e\n\u003cp\u003eUse shielded instrumentation wiring for analog current loops where required by the installation environment. Connect cable shields according to site grounding practices to minimize electrical noise coupling. Separate analog signal wiring from high-voltage power conductors and switching loads to reduce interference.\u003c\/p\u003e\n\u003cp\u003eConfirm the FlexBus power capacity before adding multiple analog modules to the same adapter segment. Check field loop polarity, output channel assignment, and HART communication wiring before commissioning.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43782703677530,"sku":"1794-OF8IH","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1794-OF8IH2.jpg?v=1785813294","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1794-of8ih-flex-i-o-isolated-analog-output-hart-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}