{"product_id":"nfai841-s50-yokogawa-centum-vp-8-channel-high-precision-analog-input-module","title":"NFAI841-S50 | Yokogawa | CENTUM VP 8-Channel High-Precision Analog Input Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eYokogawa NFAI841-S50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-performance, 8-channel analog input module within the CENTUM VP Distributed Control System (DCS) architecture. This \"S50\" variant builds upon the high-precision 16-bit A\/D conversion of the NFAI841 series by adding enhanced environmental hardening, including ISA Standard G3 conformal coating and an extended operating temperature range. It captures bipolar voltage (±10 V) and current (±20 mA) signals with extreme accuracy, making it the primary choice for mission-critical monitoring in corrosive or non-climate-controlled industrial zones. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto ensure your system maintains peak reliability in the most demanding conditions.\u003c\/p\u003e\n\u003ch3\u003ePart Number Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe NFAI841-S50 utilizes Yokogawa's suffix logic to identify its specialized environmental protection:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eSuffix Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Definition\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNFAI841\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAnalog Input Module (8-channel, isolated, high-speed)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e-S\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eStandard Type Hardware\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e5\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWith ISA Standard G3 protection and extended temperature (-20 to 70°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e0\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBasic functional configuration\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe NFAI841-S50 delivers superior signal resolution even under thermal stress.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNumber of Input Channels:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e8 independent channels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Signal Range:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e±10 V (Voltage) \/ ±20 mA (Current).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA\/D Conversion Resolution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e16-bit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e10 MΩ (Voltage input).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eData Refresh Cycle:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e10 ms.\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 to 70°C (-4 to 158°F).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnvironmental Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eISA Standard G3 conformal coating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2.5 W.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGuaranteed 100% Brand New and Original.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe NFAI841-S50 provides targeted technical solutions for extreme-environment DCS integration:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCorrosion Resistance (ISA G3):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module features a specialized conformal coating that meets ISA Standard G3 requirements. This protection prevents copper corrosion and \"silver whiskers\" in facilities with high concentrations of Hydrogen Sulfide (H2S), Chlorine, or Sulfur Dioxide, significantly extending hardware lifespan in petrochemical and wastewater plants.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSuperior Thermal Operating Window:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike standard I\/O modules that cap at 60°C, the NFAI841-S50 operates reliably up to 70°C. This eliminates the need for expensive cabinet cooling systems in hot climates or high-heat process areas, reducing overall infrastructure costs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Fidelity 16-bit Resolution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 16-bit A\/D converter resolves minute process fluctuations that standard 12-bit modules miss. This granularity provides the precise data required for advanced control strategies, such as fuel-to-air ratio optimization in power generation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMinimal Loading Effect:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe ultra-high 10 MΩ input impedance ensures the module does not \"pull down\" the field signal. This maintains the integrity of the measurement even when using low-power transmitters or high-resistance cable runs.\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\u003eHow does the S50 differ from the S00 version?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe S50 version adds ISA Standard G3 conformal coating and extends the maximum operating temperature to 70°C. While the core electrical specs are identical, the S50 is designed specifically for harsh or corrosive environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix current and voltage inputs on the same NFAI841-S50?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. You can configure each channel individually via the CENTUM VP software to accept either voltage or current signals, allowing for maximum flexibility in cabinet wiring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the benefit of the 10ms refresh cycle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 10ms cycle ensures that the DCS receives fresh data fast enough for high-dynamic control loops, such as those governing turbine speed or rapid pressure relief valves.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this module factory-sealed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAbsolutely. We supply only\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehardware. Every NFAI841-S50 arrives in the original Yokogawa factory box with matching serial numbers and intact manufacturer seals, ensuring zero prior field deployment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":52824586092853,"sku":"NFAI841-S50","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/NFAI841-S00_83812662-2b49-4b8c-98fd-5c6b57858143.png?v=1778048131","url":"https:\/\/www.5gplc.com\/products\/nfai841-s50-yokogawa-centum-vp-8-channel-high-precision-analog-input-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}