{"product_id":"yokogawa-nfai841-s00-a4s00-analog-i-o-module","title":"Yokogawa NFAI841-S00\/A4S00 | Analog I\/O Module","description":"\u003ch2\u003eYokogawa NFAI841-S00\/A4S00 Analog I\/O Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for simultaneous 4-20 mA signal acquisition and analog current output control in CENTUM VP and CENTUM CS 3000 systems, the \u003cstrong\u003eYokogawa NFAI841-S00\/A4S00\u003c\/strong\u003e (\u003cstrong\u003eNFAI841\u003c\/strong\u003e Analog I\/O Module) provides direct electrical interfacing with field devices while maintaining system-level isolation.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNFAI841\u003c\/strong\u003e: Mixed analog input\/output module family for Yokogawa FIO systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-S00\u003c\/strong\u003e: Standard type without HART communication or explosion protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\/A4S00\u003c\/strong\u003e: Terminal block configuration for pressure-clamp or standard field wiring\u003c\/li\u003e\n\u003c\/ul\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 NFAI841-S00\/A4S00\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\u003eApprox. 0.35 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\u003e0 degC to 60 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowerConsumption\u003c\/td\u003e\n\u003ctd\u003e5 VDC max 230 mA, 24 VDC max 190 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signals\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signals\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e4 input + 4 output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e250 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Load Resistance\u003c\/td\u003e\n\u003ctd\u003e0 to 750 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003eInput +\/-0.1% FS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefresh Cycle\u003c\/td\u003e\n\u003ctd\u003e10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eChannel-to-channel and system-to-field isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstand Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eYokogawa DCS Analog Loop \u0026amp; Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe NFAI841-S00\/A4S00 module features galvanic isolation between each analog channel and the system internal circuits to prevent ground loop interference. 4-20 mA loops support HART overlay signaling for device diagnostics and configuration without additional cabling. Each analog input and output channel maintains independent signal referencing, ensuring integrity during simultaneous acquisition and actuation. Cold junction compensation (CJc) is implemented to maintain accuracy over the specified temperature range.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this module be hot-swapped during operation?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The module supports hot-swappable insertion and removal under power, but dual-redundant loop configuration is recommended for critical PID loops to prevent transient signal loss.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum output load allowed?\u003c\/strong\u003e\u003cbr\u003eA: Output channels can drive loads up to 750 ohm. Exceeding this may result in current clipping or voltage saturation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How is channel isolation maintained?\u003c\/strong\u003e\u003cbr\u003eA: Each input and output channel is isolated using photo-coupled barriers, preventing cross-talk and ground loop interference while maintaining full compliance with DCS system safety limits.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse twisted-pair shielded cable for all analog loops; terminate shields at a single cabinet ground point\u003c\/li\u003e\n\u003cli\u003eMaintain physical separation from high-voltage power conductors to reduce induced noise\u003c\/li\u003e\n\u003cli\u003eConfirm correct loop polarity before energizing modules\u003c\/li\u003e\n\u003cli\u003eEnsure secure module seating and proper backplane engagement to avoid intermittent contacts\u003c\/li\u003e\n\u003cli\u003eAvoid exceeding specified ambient temperature (0-60 degC) and humidity (10-90% RH) for stable operation\u003c\/li\u003e\n\u003cli\u003eCheck terminal block wiring per \/A4S00 configuration to ensure consistent current loop connectivity\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44214243393624,"sku":"NFAI841-S00\/A4S00","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/NFAI841-S00A4S00-3.jpg?v=1781059369","url":"https:\/\/www.industriaxplc.com\/products\/yokogawa-nfai841-s00-a4s00-analog-i-o-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}