{"product_id":"yokogawa-nfaf135-s50-isolated-analog-input","title":"Yokogawa NFAF135-S50 Isolated Analog Input","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa NFAI135-S50\u003c\/strong\u003e operates as a dedicated hardware component for multi-channel current signal evaluation, localized instrument loop regulation, and analog-to-digital parameter conversion within Yokogawa STARDOM FCN\/FCJ autonomous controller platforms. Configured with 8 individually isolated tracking paths and built-in transmitter power supplies, the solid-state module provides direct physical\/electrical execution to digitize high-accuracy process variables across demanding plant environments.\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\u003eNFAI135-S50\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\u003e0.3 kg (0.66 lbs) net component mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C continuous plant limits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogic Power Consumption\u003c\/td\u003e\n\u003ctd\u003eMax. 360 mA at 5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Power Consumption\u003c\/td\u003e\n\u003ctd\u003eMax. 450 mA at 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Configuration\u003c\/td\u003e\n\u003ctd\u003e8 hardware channels (individually isolated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Range\u003c\/td\u003e\n\u003ctd\u003e4-20 mA nominal current inputs (25 mA allowable maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Resistance Profile\u003c\/td\u003e\n\u003ctd\u003ePower ON: 250 Ohm | Power OFF: \u0026gt;= 500 kOhm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.1% of full scale span\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Refresh Cycle\u003c\/td\u003e\n\u003ctd\u003e10 ms continuous internal conversion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Response Velocity\u003c\/td\u003e\n\u003ctd\u003e100 ms maximum execution time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Drift\u003c\/td\u003e\n\u003ctd\u003eMax. +\/- 0.01% \/ deg C thermal variance profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitter Power Supply\u003c\/td\u003e\n\u003ctd\u003e22.8 to 26.4 V DC with a 27 mA current limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Withstand Voltage\u003c\/td\u003e\n\u003ctd\u003e500 V AC for 1 minute (Input-to-System and Channel-to-Channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Wiring Support\u003c\/td\u003e\n\u003ctd\u003e2-wire or 4-wire transmitter topologies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol Support\u003c\/td\u003e\n\u003ctd\u003eHART communication passthrough\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eAnalog Input Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; Distributed System Infrastructure\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel-to-Channel Isolation and Noise Suppression Rails\u003c\/strong\u003e The hardware architecture enforces full galvanic channel-to-channel and channel-to-system electrical separation rated at 500 V AC for 1 minute. This physical barrier stops ground loop currents and common-mode voltage spikes from propagating between parallel field transmitter circuits, preventing variable data skew on the system bus while maintaining a stable +\/- 0.1% full-scale accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual\/Quad Wire Transmitter Conditioning and Impedance Control\u003c\/strong\u003e The module's input channels feature hardware pin configurations supporting both 2-wire (loop-powered) and 4-wire (externally powered) instrumentation networks. During normal operation (Power ON), the channel maintains a standard 250 Ohm precision loop burden; upon a system power loss (Power OFF), the input impedance shifts autonomously to \u0026gt;= 500 kOhm to eliminate parasitic current loading on active field transmitters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the integrated 27 mA transmitter power supply current limit protect the control loop during a field wiring fault?\u003c\/p\u003e\n\u003cp\u003eA: If a field instrument malfunction or physical wire short-circuit creates an overcurrent condition, the module's internal power management stage clamps the loop current at a 27 mA maximum threshold. This localized current-limiting action prevents the fault from causing thermal stress, dropping the shared 24 V DC internal distribution rail, or interrupting data acquisition on adjacent operational channels.\u003c\/p\u003e\n\u003cp\u003eQ: What operational latency impacts process variable tracking during rapid step changes in pressure or flow loops?\u003c\/p\u003e\n\u003cp\u003eA: The module executes internal analog-to-digital conversion routines on a continuous 10 ms data refresh cycle, driving a total analog step response time of 100 ms to reach full signal value. This hardware timing constraint is optimized for high-speed industrial control loops, ensuring real-time process parameters update in the controller memory without introducing signal processing lag.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":47634810994878,"sku":"NFAF135-S50","price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-06-15_17-52-24.png?v=1781518108","url":"https:\/\/www.autooiltech.com\/products\/yokogawa-nfaf135-s50-isolated-analog-input","provider":"AutoOilTech Limited","version":"1.0","type":"link"}