{"product_id":"allen-bradley-1794-ie8h-flex-i-o-hart-analog-input-module","title":"Allen-Bradley 1794-IE8H Flex I\/O HART Analog Input Module","description":"\u003ch2\u003eAllen-Bradley 1794-IE8H Flex I\/O HART Analog Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for analog signal acquisition in the Flex I\/O 1794 system, the \u003cstrong\u003eAllen-Bradley 1794-IE8H\u003c\/strong\u003e (\u003cstrong\u003e1794-IE8H\u003c\/strong\u003e Flex I\/O HART Analog Module) provides direct physical\/electrical execution for eight single-ended voltage\/current input channels. The module accepts 0-20 mA and 4-20 mA analog signals through Flex I\/O terminal bases and transfers converted data through compatible communication adapters.\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-IE8H\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\u003e0.29 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 55 deg C (32 deg F to 131 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e3.9 W maximum at 31.2 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eFlex I\/O HART Analog 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\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e8 single-ended non-isolated inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Range\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 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConversion Type\u003c\/td\u003e\n\u003ctd\u003eSuccessive Approximation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbsolute Accuracy\u003c\/td\u003e\n\u003ctd\u003e0.1% Full Scale at 20 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Accuracy Drift\u003c\/td\u003e\n\u003ctd\u003e0.05% Full Scale for 0 deg C to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response\u003c\/td\u003e\n\u003ctd\u003e80 ms to 99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Supply\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal DC Supply Range\u003c\/td\u003e\n\u003ctd\u003e19.0 to 31.2 VDC including 5% AC ripple\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexBus Current External Input\u003c\/td\u003e\n\u003ctd\u003e5 VDC, 80 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Method\u003c\/td\u003e\n\u003ctd\u003eDIN Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Base Compatibility\u003c\/td\u003e\n\u003ctd\u003e1794-TB3G and 1794-TB3GS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eOpen-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e13.5 BTU\/hr at 31.2 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHART Analog Signal Processing and Channel Configuration\u003c\/h3\u003e\n\u003cp\u003eThe 1794-IE8H provides eight configurable analog input channels for current-based instrumentation signals. Each channel operates as a single-ended input path with non-isolated channel architecture. The module performs analog-to-digital conversion using successive approximation technology with 16-bit resolution.\u003c\/p\u003e\n\u003cp\u003eThe module supports Flex I\/O HART analog data handling through compatible communication adapters. Signal processing includes configurable data formatting and monitoring through eight red fault indicators, eight yellow channel status indicators, and one green power indicator.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What terminal bases are compatible with the 1794-IE8H module?\u003cbr\u003eA: The module is installed on Flex I\/O terminal bases including 1794-TB3G and 1794-TB3GS. The terminal base determines field wiring connections.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1794-IE8H provide isolated analog input channels?\u003cbr\u003eA: No. The module uses eight single-ended non-isolated input channels with a specified continuous isolation voltage of 50 V.\u003c\/p\u003e\n\u003cp\u003eQ: What external supply voltage range is required for operation?\u003cbr\u003eA: The module requires a 24 VDC nominal external supply and operates within a 19.0 to 31.2 VDC range including 5% AC ripple.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1794-IE8H on a compatible DIN rail assembly with the correct Flex I\/O terminal base installed. Verify that field wiring follows the terminal base documentation and that analog signal conductors are separated from high-voltage power cables and high-frequency switching circuits.\u003c\/p\u003e\n\u003cp\u003eUse shielded instrumentation wiring where required by the application. Connect cable shields according to the plant grounding standard to minimize electrical noise coupling into the analog input channels.\u003c\/p\u003e\n\u003cp\u003eConfirm that the external 24 VDC supply polarity is correct before energizing the module. Check FlexBus connections, terminal seating, and indicator status after installation. Avoid routing low-level analog signal wiring parallel to motor feeders or drive output conductors.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43768324292698,"sku":"1794-IE8H","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1794-IE8H2.jpg?v=1785484912","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1794-ie8h-flex-i-o-hart-analog-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}