{"product_id":"allen-bradley-1794-ie8h-8-point-high-density-hart-analog-input","title":"Allen-Bradley 1794-IE8H | 8-Point High-Density HART Analog Input","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1794-IE8H\u003c\/strong\u003e is a high-performance Analog Input Module designed for the FLEX I\/O™ platform, specifically engineered to support \u003cstrong\u003eHART (Highway Addressable Remote Transducer)\u003c\/strong\u003e protocol. This module provides eight high-density analog input channels with 16-bit resolution, utilizing Successive Approximation technology for rapid and accurate signal conversion. By integrating HART capabilities, the 1794-IE8H allows for seamless digital communication with smart field devices, enabling advanced diagnostics and remote configuration while maintaining reliable 4-20mA analog signal integrity.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 15px 0;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003cth style=\"border: 1px solid #dee2e6; padding: 12px; text-align: left;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #dee2e6; padding: 12px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e16 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e\u003cstrong\u003eAbsolute Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e0.1% Full Scale @ 20°C (68°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e\u003cstrong\u003eInput Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e19.0V to 31.2V DC (Nominal 24V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e\u003cstrong\u003eUnit Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e200 g (7.05 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e\u003cstrong\u003eStep Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e80 ms to 99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dee2e6; padding: 10px;\"\u003e50V Continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eInstallation \u0026amp; Engineering Guide\u003c\/h2\u003e\n\u003cp\u003eOptimal performance of the 1794-IE8H depends on precise electrical installation and thermal management:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHART Integration:\u003c\/strong\u003e Ensure your field devices are HART-compatible to utilize the module's digital diagnostic capabilities. The module acts as a master for collecting secondary variables (temperature, pressure, etc.) without disrupting the primary 4-20mA loop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Management:\u003c\/strong\u003e The module generates approximately 13.5 BTU\/hr. Maintain adequate ventilation within the enclosure, especially when modules are stacked, to prevent accuracy drift (0.05% Full Scale).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeyswitch Position:\u003c\/strong\u003e Set the terminal base keyswitch to \u003cstrong\u003ePosition 3\u003c\/strong\u003e prior to module insertion to prevent hardware damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexBus Loading:\u003c\/strong\u003e The 200 g module draws 80mA from the FlexBus at 5V DC. Calculate the total current draw of your I\/O stack to ensure it does not exceed the adapter's capacity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Precision:\u003c\/strong\u003e 16-bit resolution ensures granular data capture for critical process variables, reducing measurement uncertainty in high-stakes environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Diagnostics:\u003c\/strong\u003e The HART interface facilitates asset management (FDT\/DTM) and simplifies troubleshooting by allowing technical teams to access device health status directly from the control room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 200g Design:\u003c\/strong\u003e The lightweight, small-footprint architecture allows for high-density mounting on standard 35mm DIN rails, significantly reducing cabinet size requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Isolation:\u003c\/strong\u003e 50V continuous isolation protects the FlexBus and internal backplane circuitry from field-side electrical noise and transients.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What conversion method does the 1794-IE8H use?\u003c\/strong\u003e\u003cbr\u003eA1: It uses the \u003cstrong\u003eSuccessive Approximation\u003c\/strong\u003e method, which offers a perfect balance between high resolution (16 bits) and fast step response times (80 ms), ideal for dynamic process control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Does this module require an external power supply?\u003c\/strong\u003e\u003cbr\u003eA2: Yes, a nominal 24V DC external supply is required (operating range 19.0–31.2V DC) to power the analog circuitry and field-side electronics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: Can I swap this 200 g module while the system is powered?\u003c\/strong\u003e\u003cbr\u003eA3: Yes, FLEX I\/O modules support \"Removal and Insertion Under Power\" (RIUP), allowing you to replace the module without shutting down the entire system, provided process safety protocols are followed.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51050727309444,"sku":"1794-IE8H","price":108.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/1794-IE8H.jpg?v=1777389037","url":"https:\/\/www.etowonauto.com\/tk\/products\/allen-bradley-1794-ie8h-8-point-high-density-hart-analog-input","provider":"Etowon Auto","version":"1.0","type":"link"}