{"product_id":"1797-ibn16-allen-bradley-16-point-namur-intrinsically-safe-input-module","title":"1797-IBN16 | Allen-Bradley 16-Point NAMUR Intrinsically Safe Input Module","description":"\u003ch2\u003e\u003cstrong\u003eModule Overview\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"citation-300\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e1797-IBN16\u003c\/strong\u003e\u003cspan class=\"citation-300 citation-end-300\"\u003e\u003cspan\u003e \u003c\/span\u003eis a high-density, intrinsically safe (IS) digital input module specifically engineered for hazardous environments.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"citation-299 citation-end-299\"\u003ePart of the Allen-Bradley FLEX Ex I\/O family, this module is designed to interface directly with up to 16 NAMUR-compatible proximity sensors or dry contact switches located in Zone 1 or Zone 2 (Class I, II, III, Division 1) areas.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eBy integrating intrinsic safety barriers directly into the I\/O hardware, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IBN16\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eeliminates the need for external isolation barriers, significantly reducing cabinet space and wiring complexity. It provides advanced diagnostics, including open-circuit and short-circuit detection, to ensure maximum uptime in critical process applications such as chemical refining and oil and gas production.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eDetailed Engineering Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"citation-298\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e1797-IBN16\u003c\/strong\u003e\u003cspan class=\"citation-298 citation-end-298\"\u003e\u003cspan\u003e \u003c\/span\u003eis a non-isolated, sinking input module that adheres to strict international explosion protection standards.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-297\"\u003e\u003c\/span\u003e\u003cstrong\u003eNumber of Inputs:\u003c\/strong\u003e\u003cspan class=\"citation-297 citation-end-297\"\u003e\u003cspan\u003e \u003c\/span\u003e16 Channels (Non-isolated, Sinking)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Type:\u003c\/strong\u003e\u003cspan class=\"citation-296 citation-end-296\"\u003e\u003cspan\u003e \u003c\/span\u003eNAMUR (IEC 60947-5-6) compatible\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-295\"\u003e\u003c\/span\u003e\u003cstrong\u003eIntrinsic Safety Ratings:\u003c\/strong\u003e\u003cspan class=\"citation-295 citation-end-295\"\u003e\u003cspan\u003e \u003c\/span\u003e* Ex ia IIB\/IIC T4 \/ AEx ia IIC T4\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\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\u003cspan class=\"citation-294\"\u003e\u003c\/span\u003e\u003cstrong\u003eOn-State Current:\u003c\/strong\u003e\u003cspan class=\"citation-294 citation-end-294\"\u003e\u003cspan\u003e \u003c\/span\u003e\u0026gt; 2.1 mA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOff-State Current:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u0026lt; 1.2 mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHysteresis:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0.2 mA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-293\"\u003e\u003c\/span\u003e\u003cstrong\u003eMaximum Load Voltage:\u003c\/strong\u003e\u003cspan class=\"citation-293 citation-end-293\"\u003e\u003cspan\u003e \u003c\/span\u003e7.5V DC\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-292\"\u003e\u003c\/span\u003e\u003cstrong\u003eInput Frequency:\u003c\/strong\u003e\u003cspan class=\"citation-292 citation-end-292\"\u003e\u003cspan\u003e \u003c\/span\u003e1000 Hz (Max)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Pulse Width:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u0026gt; 500 µs (On or Off)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelectable Filter Times:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1 ms, 2 ms, 3 ms, 5 ms, 9 ms, 17 ms, or 33 ms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIndicators:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e* 16 Yellow (Status)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e16 Red (Fault\/Wire-off\/Short-circuit)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-291 citation-end-291\"\u003e1 Green (Module Power)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-290\"\u003e\u003c\/span\u003e\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e\u003cspan class=\"citation-290 citation-end-290\"\u003e\u003cspan\u003e \u003c\/span\u003e2.8 Watts\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan class=\"citation-289\"\u003e\u003c\/span\u003e\u003cstrong\u003eThermal Dissipation:\u003c\/strong\u003e\u003cspan class=\"citation-289 citation-end-289\"\u003e\u003cspan\u003e \u003c\/span\u003e9.6 BTU\/hr (Max)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical Weight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0.81 lbs (0.37 kg)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eNAMUR Diagnostics and Fault Detection\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"citation-288\"\u003eThe defining feature of the\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e1797-IBN16\u003c\/strong\u003e\u003cspan class=\"citation-288 citation-end-288\"\u003e\u003cspan\u003e \u003c\/span\u003eis its adherence to the NAMUR sensor standard.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eThis allows the module to distinguish between four distinct line states:\u003c\/p\u003e\n\u003col class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOFF:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNormal state where current is between 1.2 mA and 2.1 mA.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eON:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNormal state where current is above 2.1 mA.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShort-Circuit:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDetected when the circuit resistance drops too low (current \u0026gt; 6 mA).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOpen-Circuit (Wire-Off):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDetected when the circuit resistance is too high (current \u0026lt; 0.15 mA).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan class=\"citation-287 citation-end-287\"\u003eIf a fault is detected, the corresponding red LED illuminates, and a diagnostic bit is sent to the Logix controller, allowing for immediate identification of field wiring issues without manual troubleshooting.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation and Hazardous Area Wiring\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"citation-286\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e1797-IBN16\u003c\/strong\u003e\u003cspan class=\"citation-286\"\u003e\u003cspan\u003e \u003c\/span\u003emust be used with a specific FLEX Ex terminal base, either the\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e1797-TB3\u003c\/strong\u003e\u003cspan class=\"citation-286\"\u003e\u003cspan\u003e \u003c\/span\u003e(screw) or\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e1797-TB3S\u003c\/strong\u003e\u003cspan class=\"citation-286 citation-end-286\"\u003e\u003cspan\u003e \u003c\/span\u003e(spring-clamp).\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eBecause this is an intrinsically safe module, it must be installed in a protected environment (like a NEMA 4X enclosure) and powered by an approved 1797-PS series IS power supply. Maintenance personnel can safely perform \"Removal and Insertion Under Power\" (RIUP) even in hazardous areas, provided the system was designed following the specific FLEX Ex entity parameters.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical FAQ\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use standard \"dry contact\" limit switches with this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, but to maintain the line-monitoring diagnostics (Open\/Short circuit), you must install two resistors at the switch: one in series and one in parallel. This mimics the impedance of a NAMUR sensor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum wire length for sensors connected to the 1797-IBN16?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe distance is limited primarily by the capacitance and inductance of the cable to maintain intrinsic safety. Generally, distances up to 1,000 feet are achievable with standard 12 AWG (4\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$mm^2$\u003c\/span\u003e) instrument cable, but a formal IS entity calculation should be performed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module require an external barrier?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1797-IBN16\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis an \"associated apparatus\" that contains its own internal IS limiting circuitry. It is designed to be the barrier between the safe-area backplane and the hazardous-area field sensors.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52457813410101,"sku":"1797-IBN16","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1797-IBN16.jpg?v=1773993446","url":"https:\/\/www.5gplc.com\/products\/1797-ibn16-allen-bradley-16-point-namur-intrinsically-safe-input-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}