{"product_id":"allen-bradley-flex-ex-1797-ie8-8-point-16-bit-intrinsically-safe-analog-input-module","title":"Allen-Bradley FLEX Ex 1797-IE8 8-Point 16-Bit Intrinsically Safe Analog Input Module","description":"\u003ch2\u003e\u003cstrong\u003eModule Overview\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-precision, intrinsically safe (IS) analog input module within the Allen-Bradley FLEX Ex I\/O family. It is specifically engineered to interface with field transmitters located in the most volatile hazardous areas, including Zone 1 and Zone 2 (Class I, II, III, Division 1). This module provides eight non-isolated analog inputs with 16-bit resolution, delivering the extreme granular accuracy required for process variables such as temperature, pressure, and flow. By integrating certified intrinsic safety barriers into the module itself, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eallows for direct connection to IS-rated field devices without the need for external zener barriers or galvanic isolators.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eDetailed Engineering Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis designed for the demanding environmental and electrical requirements of the chemical, oil, and gas industries.\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 Channels (Non-isolated)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Signal Range:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e4–20 mA or 0–20 mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e16-Bit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntrinsic Safety Ratings:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eEx ia IIB\/IIC T4 \/ AEx ia IIC T4\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClass I, II, III, Division 1, Groups A–G T4\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModule Field-Side Power Consumption:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e7.5 Watts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e5.2 Watts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Dissipation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e17.7 BTU\/hr\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIndicators:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e8 Red (Channel Fault\/Wire-Off\/Over-range)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e1 Green (Module Power)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConversion Rate:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eApprox. 8 ms (all channels)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eData Format:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEngineering Units (4–20 mA = 4000–20000) or Percent of Full Scale\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e-20°C to 70°C (-4°F to 158°F)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical Weight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0.85 lbs (0.39 kg)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eIntrinsically Safe Architecture\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe primary advantage of the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis its \"Associated Apparatus\" status. It contains energy-limiting circuitry that prevents sparks or thermal effects capable of igniting an explosive atmosphere from reaching the hazardous area. This allows for live maintenance—including Removal and Insertion Under Power (RIUP)—in the hazardous zone, provided the installation follows the specific entity parameters and the FLEX Ex system design guidelines.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAdvanced Diagnostics and Signal Integrity\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe module is equipped with eight dedicated red fault indicators. These LEDs provide immediate visual feedback for field-side issues such as an open circuit (wire-off) or a transmitter signal falling outside the calibrated range. Because the 16-bit resolution divides the signal into 65,536 increments, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecan detect even the slightest process fluctuations, which is essential for high-fidelity control loops and safety instrumented systems (SIS).\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation and Mounting Requirements\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eTo maintain its safety certification, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emust be used with a 1797-series terminal base, such as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-TB3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-TB3S\u003c\/strong\u003e. It must be powered by an approved FLEX Ex intrinsically safe power supply (1797-PS series). Proper separation between IS and non-IS wiring must be maintained within the control cabinet, typically utilizing a minimum 50mm (2-inch) air gap or a physical barrier as per local electrical codes.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical FAQ\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module support HART communication?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a standard high-resolution analog module. If your application requires HART digital data pass-through, the 1797-IE8H variant would be required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this module to power a 2-wire transmitter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IE8\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides the necessary loop power for 2-wire transmitters through the terminal base, eliminating the need for an external power supply for the field instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens if a single channel experiences a wire-off condition?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module will immediately light the corresponding red LED and set a diagnostic bit in the PLC's input image table. The other seven channels will continue to operate normally without interference.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52457841328437,"sku":"1797-IE8","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1797-IE8.jpg?v=1773994166","url":"https:\/\/www.5gplc.com\/products\/allen-bradley-flex-ex-1797-ie8-8-point-16-bit-intrinsically-safe-analog-input-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}