{"product_id":"yokogawa-nfar181-s50-rtd-input-module","title":"Yokogawa NFAR181-S50 | RTD Input Module","description":"\u003ch2\u003eYokogawa NFAR181-S50 RTD Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa NFAR181-S50\u003c\/strong\u003e also cataloged as the \u003cstrong\u003eNFAR181\u003c\/strong\u003e RTD Input Module, operates as a dedicated hardware component for resistance temperature signal acquisition within Yokogawa STARDOM controller I\/O networks.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eModel designation \u003cstrong\u003eNFAR181-S50\u003c\/strong\u003e does not include a publicly specified structured suffix decomposition beyond series identifier and configuration code. No additional sub-variant logic is defined in the provided technical dataset.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModelBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa NFAR181-S50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperatingTemp\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowerConsumption\u003c\/td\u003e\n\u003ctd\u003e450 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e12 channels, isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003ePt100 \/ JPt100, 3-wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Current\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Range\u003c\/td\u003e\n\u003ctd\u003e-200 to 800 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.15 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpdate Cycle\u003c\/td\u003e\n\u003ctd\u003e1 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstanding Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 VAC (1 min, input to system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;= 2 MOhm (power ON\/OFF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBurnout Detection\u003c\/td\u003e\n\u003ctd\u003eConfigurable per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch2\u003eChannel-to-Channel Isolation and Cold Junction Compensation Architecture\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa NFAR181-S50\u003c\/strong\u003e implements per-channel galvanic isolation across all 12 RTD inputs, reducing cross-channel coupling under mixed lead resistance conditions. Cold junction compensation (CJC) logic is internally applied for RTD linearization and reference junction correction within the acquisition pipeline. Measurement excitation is fixed at 1 mA per channel, ensuring stable voltage conversion across Pt100 elements under varying loop resistance conditions. The architecture prioritizes deterministic sampling with a 1 s refresh cycle aligned to controller scan timing.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Does the module support hot-swap insertion under live backplane power?\u003c\/strong\u003e\u003cbr\u003eA1: Hot-swap capability is not specified. Installation should be performed with backplane power removed to avoid transient excitation on RTD input circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: What is the impact of channel isolation on measurement timing?\u003c\/strong\u003e\u003cbr\u003eA2: Isolation is implemented at channel level without altering the 1 s data refresh cycle. No inter-channel timing skew parameters are defined in the provided specification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: Can lead wire resistance be compensated automatically?\u003c\/strong\u003e\u003cbr\u003eA3: Compensation is inherently supported through 3-wire RTD configuration with matched line resistance requirement across all conductors.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eRTD inputs shall be wired using 3-wire Pt100 configuration with equalized conductor resistance per channel. Shielding should be terminated at a single earth reference point to minimize ground loop formation. Maintain separation between RTD signal cables and high-voltage switching lines to reduce induced noise coupling. Ensure terminal torque and insertion integrity according to rack-side connector specification before energizing the system.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44163807346776,"sku":"NFAR181-S50","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/NFAR181-S50.jpg?v=1780305073","url":"https:\/\/www.industriaxplc.com\/products\/yokogawa-nfar181-s50-rtd-input-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}