{"product_id":"yokogawa-nfai141-s01-analog-input-module-16-channel-4-20ma-isolated","title":"Yokogawa NFAI141-S01 Analog Input Module (16-Channel, 4-20mA, Isolated)","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Yokogawa NFAI141-S01 stands as a cornerstone of data acquisition for the CENTUM VP and CS 3000 Distributed Control Systems. This high-density analog input module features 16 isolated channels specifically engineered to process 4–20 mA current signals with superior precision. In mission-critical sectors such as oil and gas refining or power generation, this module provides the essential interface for monitoring critical process variables including pressure, flow, and temperature. The NFAI141-S01 excels in stabilizing signals from remote field transmitters, utilizing robust galvanic isolation to prevent ground loops from corrupting sensitive control data. By delivering clean, high-resolution digitized values to the field control station, this module empowers operators to maintain peak process efficiency and respond instantly to thermal or pressure excursions.\u003c\/p\u003e\n\u003ch2\u003eTechnical Configuration\u003c\/h2\u003e\n\u003cp\u003eThe NFAI141-S01 follows a specific nomenclature that defines its hardware capability and environmental suitability for industrial racks.\u003c\/p\u003e\n\u003ch3\u003eModel Suffix Breakdown\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNFAI141:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBasic Model Code identifying the 16-channel isolated analog current input module.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e-S:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesignates the Standard Type, optimized for universal process automation and standard high-speed data acquisition tasks within the Yokogawa DCS ecosystem.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIndicates the standard functional configuration, ensuring the module supports the full range of 4–20 mA diagnostic features including burn-out detection and over-range monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRepresents the connection and protection type. This variant is designed for installation in standard, non-explosion-proof environments, utilizing standard connector interfaces for rapid integration into FCN or FCU base units.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\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\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYokogawa\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNFAI141-S01\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16 (Isolated)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Signal\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 to 20 mA DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e±0.1% of Full Scale\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eData Refresh Cycle\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10 ms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Resistance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250 Ω (Power ON)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWithstand Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e500 V AC (between input and system)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDimensions (W x H x D)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e33.1 mm x 130 mm x 123.5 mm\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e0.3 kg\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCurrent Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMax 320 mA (5V DC)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003cp\u003eCorrect engineering practices during the deployment of the NFAI141-S01 safeguard the integrity of your process signals and prevent hardware degradation.\u003c\/p\u003e\n\u003ch3\u003eWiring and Termination\u003c\/h3\u003e\n\u003cp\u003eUtilize high-quality shielded twisted-pair (STP) cabling for all field connections to minimize the impact of electromagnetic interference. Secure the connections to the terminal block, ensuring that no bare wire is exposed. For 2-wire transmitters, verify that the module provides sufficient loop power; the internal 250 Ω resistance is optimized for standard 4-20 mA current loops.\u003c\/p\u003e\n\u003ch3\u003eShielding and Grounding\u003c\/h3\u003e\n\u003cp\u003eAlways ground the cable shields at the DCS cabinet side only. This single-point grounding prevents ground potential differences from creating circulating currents that could introduce measurement offsets. Maintain a minimum bending radius for signal cables to prevent mechanical stress on the module’s front-panel connectors.\u003c\/p\u003e\n\u003ch3\u003eThermal Management\u003c\/h3\u003e\n\u003cp\u003eThe module operates efficiently between -20°C and +70°C. However, in high-density racks where multiple NFAI141 modules are installed side-by-side, ensure active cooling or sufficient natural convection airflow. Leave a clearance of at least 50 mm above and below the base unit to allow heat to dissipate away from the sensitive ADC circuitry.\u003c\/p\u003e\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cp\u003eThe NFAI141-S01 provides a formidable barrier against the electrical noise and surges typical of large-scale industrial plants. Its 500 V AC isolation rating ensures that a catastrophic electrical fault at a single field transmitter does not propagate back to the central processor, maintaining overall system availability. The module's impressive 10 ms refresh cycle makes it ideal for fast-acting control loops and transient analysis in turbine monitoring systems. Furthermore, its ruggedized Japan-made architecture is built to withstand the corrosive atmospheres of chemical plants, ensuring a decades-long service life without the calibration drift common in lower-grade commercial components.\u003c\/p\u003e\n\u003ch2\u003eDelivery and Shipping\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDelivery Time:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3-5 business days upon payment finish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLogistics Partners:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReliable global delivery via DHL, FEDEX, or UPS.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Condition:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBrand New, Original Factory Sealed, Export Packaging.\u003c\/p\u003e\n\u003ch2\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: How does the module handle a transmitter failure or broken wire?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA1: The NFAI141-S01 includes integrated burn-out detection. If the input current falls below the threshold (typically 0.65 mA), the module triggers a diagnostic alarm to the DCS, allowing operators to identify and resolve the fault immediately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Is the NFAI141-S01 hot-swappable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA2: Yes, the CENTUM VP and CS 3000 architectures support the online replacement of I\/O modules. However, the control loop should be placed in manual or a safe state before physical removal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: Does this module require an external power supply for the current loops?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA3: The NFAI141-S01 is a passive input module in terms of loop power. While it measures the current, the power for the 4-20 mA loop must be provided by the field transmitter or an external 24V DC power source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: What is the benefit of the 250 Ω input resistance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA4: The 250 Ω resistor converts the 4-20 mA current into a 1-5 V DC signal internally. This is the industry-standard impedance for ensuring signal stability while maintaining compatibility with most standard HART and analog transmitters.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45907148275885,"sku":"NFAI141-S01","price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/yokogawa_nfai141-s01_1.jpg?v=1776137488","url":"https:\/\/www.maxwellplc.com\/products\/yokogawa-nfai141-s01-analog-input-module-16-channel-4-20ma-isolated","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}