{"product_id":"yokogawa-nfar181-s50-r8s10-rtd-input-module","title":"Yokogawa NFAR181-S50\/R8S10 RTD Input Module","description":"\u003cp\u003eThe Yokogawa NFAR181-S50\/R8S10 is a 12-channel resistance temperature detector (RTD) input module designed to acquire temperature signals from three-wire Pt100 sensors. It provides isolated input channels for temperature measurement and connects to external RTD wiring through a pressure-clamp terminal block with surge absorber. The module converts sensor resistance into temperature data for processing by the control system.\u003c\/p\u003e\n\u003ch3\u003eFunctional Description\u003c\/h3\u003e\n\u003cp\u003eThe NFAR181 receives resistance signals from connected RTD sensors and converts them into digital temperature measurement data. Its 12-channel configuration allows multiple temperature points to be monitored through one module.\u003c\/p\u003e\n\u003cp\u003eChannel isolation separates the input circuits, helping limit electrical interference and unwanted signal coupling between measurement points. This is useful when monitoring temperature sensors installed at different locations or connected to electrically distinct equipment.\u003c\/p\u003e\n\u003ch3\u003eRTD Input Specifications\u003c\/h3\u003e\n\u003cp\u003eThe module supports Pt100 and JPt100 three-wire RTD sensors. The three-wire measurement arrangement compensates for lead-wire resistance, provided the resistance of each wire is equal. The allowable wiring resistance is 40 ohms per wire, which should be considered when selecting sensor cables and planning field connections.\u003c\/p\u003e\n\u003cp\u003eThe specified RTD measurement current is 1 mA. The measurement accuracy is rated at +\/-0.03% of full scale over the 0 to 400 ohm input range. A 1-second data refresh cycle makes the module suitable for process temperature monitoring where this update interval meets the application requirements.\u003c\/p\u003e\n\u003ch3\u003eTerminal Block and Surge Protection\u003c\/h3\u003e\n\u003cp\u003eThe \/R8S10 option identifies a pressure-clamp terminal block for RTD connections with a surge absorber. This provides the external wiring interface for connecting the field RTD sensors to the module.\u003c\/p\u003e\n\u003cp\u003eThe terminal block configuration should be checked against the existing field wiring arrangement when replacing an installed module. The terminal block option is part of the complete ordering configuration and should not be treated as interchangeable with other connection options without verification.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eNFAR181-S50\/R8S10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRTD Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Input Channels\u003c\/td\u003e\n\u003ctd\u003e12, isolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal\u003c\/td\u003e\n\u003ctd\u003ePt100, JPt100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Connection\u003c\/td\u003e\n\u003ctd\u003e3-wire RTD\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 Resistance\u003c\/td\u003e\n\u003ctd\u003e2 Mohm or more\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable Input Voltage\u003c\/td\u003e\n\u003ctd\u003e+\/-5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.03% of full scale (0 to 400 ohms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable Wiring Resistance\u003c\/td\u003e\n\u003ctd\u003e40 ohms per wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Refresh Cycle\u003c\/td\u003e\n\u003ctd\u003e1 second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstanding Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 V AC for 1 minute (input to system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBurnout Detection\u003c\/td\u003e\n\u003ctd\u003eAvailable, configurable for all channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBurnout Detection Time\u003c\/td\u003e\n\u003ctd\u003e60 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Current Consumption\u003c\/td\u003e\n\u003ctd\u003e450 mA at 5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Connection\u003c\/td\u003e\n\u003ctd\u003ePressure-clamp terminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Block Option\u003c\/td\u003e\n\u003ctd\u003e\/R8S10, with surge absorber\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Which RTD sensor types are supported by the NFAR181-S50\/R8S10?\u003c\/p\u003e\n\u003cp\u003eA: The module supports Pt100 and JPt100 resistance temperature detectors in three-wire configurations. Thermocouple and millivolt inputs belong to other module types and should not be assumed to be supported by this RTD module.\u003c\/p\u003e\n\u003cp\u003eQ: What is the difference between the \/R8S00 and \/R8S10 configurations?\u003c\/p\u003e\n\u003cp\u003eA: Both options use a pressure-clamp terminal block for RTD connections. The \/R8S10 version includes a surge absorber, whereas \/R8S00 is the version without the specified surge absorber.\u003c\/p\u003e\n\u003cp\u003eQ: What should be checked when replacing an existing NFAR181 module?\u003c\/p\u003e\n\u003cp\u003eA: Verify the complete model number, RTD sensor type, three-wire connection arrangement, terminal block configuration and system compatibility. The 40 ohm per-wire resistance limit should also be checked against the installed field wiring.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":69254175097074,"sku":"NFAR181-S50\/R8S10","price":235.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/5589\/5794\/files\/NFAR181-S50R8S102.jpg?v=1794194235","url":"https:\/\/www.petrospare.com\/products\/yokogawa-nfar181-s50-r8s10-rtd-input-module","provider":"Petro Spare Industrial Limited","version":"1.0","type":"link"}