{"product_id":"allen-bradley-1794-ie8h-flex-i-o-hart-analog-input-module-8-channel","title":"Allen-Bradley 1794-IE8H FLEX I\/O HART Analog Input Module | 8-Channel","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1794-IE8H\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a high-precision analog interface for the FLEX I\/O platform, specifically engineered to bridge the gap between field-level smart instrumentation and the control layer. This module supports eight single-ended inputs and incorporates integrated\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHART (Highway Addressable Remote Transducer)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprotocol capabilities. It allows the controller to access advanced instrument diagnostics and configuration data while simultaneously processing primary process variables. We offer this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% brand new and original\u003c\/strong\u003e, ensuring full compatibility with your existing process control architecture.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1794-IE8H utilizes successive approximation conversion to provide superior data granularity for critical loops:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNumber of Inputs:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e8 Single-ended, non-isolated\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e16 bits\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConversion Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSuccessive Approximation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAbsolute Accuracy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0.1% Full Scale @ 20 °C (68°F)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStep Response:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e80 ms to 99%\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExternal Power:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e24V DC nominal (19.0 to 31.2V DC range)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIsolation Voltage:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e50V Continuous\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3.9W @ 31.2V DC maximum\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Dissipation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e13.5 BTU\/hr.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1 Green (Power), 8 Red (Fault), 8 Yellow (Channel Status)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHorizontal or Vertical DIN Rail\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSmart Device Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe integrated HART functionality eliminates the need for separate hand-held communicators or external modems. This module passes secondary variables and device health status directly to the control system, enabling predictive maintenance strategies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Precision Signal Processing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith 16-bit resolution and an absolute accuracy of 0.1% at 20 °C, this module captures minute process fluctuations. This precision proves vital in chemical dosing or high-accuracy pressure monitoring where small deviations impact product quality.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRapid Fault Identification:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDedicated LED indicators provide immediate visual feedback. Red fault LEDs pinpoint specific channel errors, significantly reducing troubleshooting time during commissioning or unplanned outages.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSpace-Efficient Modular Design:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe FLEX I\/O small form factor reduces cabinet footprint by allowing high-density I\/O clustering. The module mounts directly onto 1794-TB3G or 1794-TB3GS terminal bases, which simplifies wiring and allows for \"hot-swapping\" without disturbing field connections.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust Thermal Management:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGenerating only 13.5 BTU\/hr, the 1794-IE8H maintains low internal temperatures even in crowded enclosures. This ensures stable operation across the full 0 °C to 55 °C temperature range without requiring additional active cooling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhich terminal bases are compatible with the 1794-IE8H?\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou must install this module onto a 1794-TB3G or 1794-TB3GS terminal base. These bases provide the necessary grounding and terminal density to support HART communication and eight input channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the module support \"hot-swapping\" while the system is powered?\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes, FLEX I\/O modules support Removal and Insertion Under Power (RIUP). You can replace the 1794-IE8H without shutting down the entire system, provided you follow standard safety protocols for your specific industrial environment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the module handle temperature-induced accuracy drift?\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module limits accuracy drift to a maximum of 0.05% of full scale across the operating range of 0 °C to 55 °C. This stability ensures reliable measurements in varying ambient plant conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module function without a HART-compatible device?\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes. The 1794-IE8H functions as a standard high-resolution 4-20mA analog input module. However, you only unlock its full diagnostic potential when connected to HART-enabled field instruments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53371841347768,"sku":"1794-IE8H","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1794-IE8H2.jpg?v=1776675870","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1794-ie8h-flex-i-o-hart-analog-input-module-8-channel","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}