{"product_id":"nfar181-s00-yokogawa-rtd-4-channel-input-module","title":"NFAR181-S00 Yokogawa RTD 4-Channel Input Module","description":"\u003ch2\u003eYokogawa NFAR181-S00 RTD Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa NFAR181-S00\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eNFAR181\u003c\/strong\u003e RTD Input Module, operates as a dedicated hardware component for temperature signal acquisition from Resistance Temperature Detectors (RTD) within CENTUM VP Distributed Control System platforms.\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\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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-S00\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\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\u003e0.1 kg (Module weight) \/ Shipping: 0.35 to 0.45 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2.2 x 12.4 x 12.6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 V DC (via backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e4 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eDIN rail mount (within standard FIO rack slot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e1500 V AC withstand voltage (input-to-system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental Rating\u003c\/td\u003e\n\u003ctd\u003eISA G3 corrosion resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStyle\u003c\/td\u003e\n\u003ctd\u003eStyle S2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, UL, SIL2 compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDCS Process Control \u0026amp; Instrumentation Attributes\u003c\/h3\u003e\n\u003cp\u003eThe NFAR181-S00 utilizes high-resolution 16-bit analog-to-digital converters to translate continuous resistance changes from physical RTD sensors into digital temperature variables. The module hardware employs channel-to-channel isolation and 1500 V AC input-to-system galvanic barriers to suppress ground loop current spikes and high-frequency common-mode noise. For precise measurement execution, the analog front-end supports automatic lead-wire resistance compensation for 3-wire or 4-wire RTD configurations, offsetting measurement errors caused by signal cable run lengths without requiring software-based correction matrices.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What are the electrical implications of the \"S00\" suffix on this module?\u003c\/p\u003e\n\u003cp\u003eA: Suffix \"S00\" specifies the standard physical version containing no intrinsic explosion protection circuits. When deploying RTD sensors in explosive or hazardous atmospheres, external intrinsic safety barriers must be placed between the field sensors and the NFAR181-S00 input channels.\u003c\/p\u003e\n\u003cp\u003eQ: How does the module handle a broken RTD wire or open sensor condition?\u003c\/p\u003e\n\u003cp\u003eA: The module contains hardware-level burnout detection circuitry. If an open circuit or wire break is detected on any of the 4 channels, the input channel state shifts to an overscale or underscale alarm limit depending on configuration, transmitting a dedicated error flag to the system controller.\u003c\/p\u003e\n\u003cp\u003eQ: Does this module require external loop power for RTD sensors?\u003c\/p\u003e\n\u003cp\u003eA: No. The NFAR181-S00 generates its own stable constant current source to feed the RTD elements, measuring the resulting voltage drop to determine temperature variations.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Method:\u003c\/strong\u003e Slide the module into its designated slot within the FIO node rack. Ensure both top and bottom locking ears snap onto the frame to provide a stable connection to the system backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding Protocol:\u003c\/strong\u003e Route all RTD signal lines in individual shielded twisted pairs. Terminate the overall shielding braids at the cabinet instrument ground bar, maintaining absolute isolation from high-voltage AC cabling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead-Wire Resistance Balance:\u003c\/strong\u003e For 3-wire and 4-wire RTD hookups, ensure all copper conductor lengths and wire gauges are identical to allow the internal compensation circuitry to balance the line resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Environment:\u003c\/strong\u003e Install inside a sealed, temperature-controlled enclosure to verify the ambient temperature does not exceed the 70 deg C operating threshold.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43664965238874,"sku":"NFAR181-S00","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/102_2f649f8f-3355-43f0-945f-189d2075b9cd.jpg?v=1784172347","url":"https:\/\/www.spareoil.com\/products\/nfar181-s00-yokogawa-rtd-4-channel-input-module","provider":"SpareOil Automation","version":"1.0","type":"link"}