{"product_id":"1756-of8ih-i-o-modules-allen-bradley","title":"1756-OF8IH I\/O Modules Allen-Bradley","description":"\u003ch2\u003e\u003cstrong\u003eAllen-Bradley 1756-OF8IH Isolated HART Analog Output Module\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eCore Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \u0026amp; Manufacturer:\u003c\/strong\u003e Allen Bradley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e ControlLogix\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e \u003cstrong\u003e1756-OF8IH\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e Isolated HART Analog Output Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e \u003cspan style=\"color: #e06c75;\"\u003e8 Isolated Differential Outputs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHART Capability:\u003c\/strong\u003e 1 dedicated modem per channel (HART 5, 6, 7)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Signal Range:\u003c\/strong\u003e \u003cstrong\u003e0-20 mA and 4-20 mA\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e 15 bits across 24 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eData Format:\u003c\/strong\u003e IEEE 32-bit floating point\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eElectrical \u0026amp; Isolation Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation Rating (Output-to-Backplane):\u003c\/strong\u003e 250V reinforced insulation (tested at 3535V DC).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation Rating (Output-to-Output\/Ground):\u003c\/strong\u003e 250V basic insulation (tested at 2120V DC).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvervoltage Protection:\u003c\/strong\u003e +\/- 24 Volts DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort-Circuit Protection:\u003c\/strong\u003e Electronically limits output current to ≤ 21 mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Capability:\u003c\/strong\u003e 50-750 Ω load (with short-circuit survival).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad Reactance:\u003c\/strong\u003e 10 μH maximum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Current Draw:\u003c\/strong\u003e ~400 mA at 24V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003ePerformance \u0026amp; Timing\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSettling Time:\u003c\/strong\u003e \u0026lt; 100 ms (HART enabled), \u0026lt; 23 ms (HART disabled).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHART Scan Time:\u003c\/strong\u003e Estimated 1 second per module with HART enabled.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration Accuracy:\u003c\/strong\u003e 0.15% at 4-20 mA range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Error:\u003c\/strong\u003e 0.3% at 4-20 mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration Interval:\u003c\/strong\u003e Standard recommendation is 12 months.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrift:\u003c\/strong\u003e ±3 ppm (Offset), ±4 ppm (Gain).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eEnvironmental \u0026amp; Operational Data\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to 60°C (32°F to 140°F).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 5-95% non-condensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Code:\u003c\/strong\u003e T4A (North America), T4 (ATEX\/IEC).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Type:\u003c\/strong\u003e Open-style (requires a ControlLogix chassis).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Conversion Method:\u003c\/strong\u003e R-Ladder DAC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the key feature of the 1756-OF8IH compared to standard analog modules?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The \u003cstrong\u003e1756-OF8IH\u003c\/strong\u003e provides \u003cspan style=\"color: #e06c75;\"\u003e\u003cstrong\u003eindividual isolation for each of its 8 output channels\u003c\/strong\u003e\u003c\/span\u003e, preventing noise and fault propagation between loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What HART versions does this module support?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It supports HART 5, 6, and 7 protocols with full read\/write capability for each channel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What kind of protection does the module offer for field wiring faults?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It features \u003cstrong\u003eovervoltage protection (±24V)\u003c\/strong\u003e and \u003cstrong\u003eelectronic short-circuit protection\u003c\/strong\u003e that limits output current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the settling time for output changes?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e With HART disabled, settling time is under \u003cstrong\u003e23 ms\u003c\/strong\u003e. With HART enabled on the channel, it is under \u003cstrong\u003e100 ms\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Do you stock the 1756-OF8IH for immediate shipment?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the \u003cstrong\u003e1756-OF8IH\u003c\/strong\u003e is typically available from our stock for fast delivery.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45503840714913,"sku":"1756-OF8IH","price":215.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/1756-OF8IH.jpg?v=1764923685","url":"https:\/\/www.autonexcontrol.com\/sk\/products\/1756-of8ih-i-o-modules-allen-bradley","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}