{"product_id":"yokogawa-nfai543-s51-analog-output-module","title":"Yokogawa NFAI543-S51 Analog Output Module","description":"\u003cp\u003eThe Yokogawa NFAI543-S51 is an analog output module in the Yokogawa STARDOM FCN\/FCJ controller I\/O family. It provides 16 isolated current-output channels with a 4-20 mA signal range for transmitting controller output commands to field devices. The module supports analog control signals where individual channel output behavior and electrical isolation are required.\u003c\/p\u003e\n\u003ch3\u003eOutput Function and Channel Configuration\u003c\/h3\u003e\n\u003cp\u003eThe NFAI543 provides 16 analog current-output channels. Each channel converts a controller-generated output value into a 4-20 mA current signal for an external field circuit.\u003c\/p\u003e\n\u003cp\u003eTypical signal destinations include control valve positioners, current-operated actuators, and other equipment configured to accept 4-20 mA commands. The isolated output design provides electrical separation between the output circuits and the system.\u003c\/p\u003e\n\u003ch3\u003eOutput Performance\u003c\/h3\u003e\n\u003cp\u003eThe documented output accuracy is +\/- 0.3% of full scale, with a 10 ms data refresh cycle and a 100 ms output step response time. These specifications describe the module's output update and response characteristics; they should not be interpreted as the response time of the complete field control loop.\u003c\/p\u003e\n\u003cp\u003eThe module also supports configurable output fallback behavior. HOLD retains the existing output value, while SETV applies a specified output value when fallback is detected. Fallback settings can be configured for individual channels.\u003c\/p\u003e\n\u003ch3\u003eElectrical Isolation and System Interface\u003c\/h3\u003e\n\u003cp\u003eThe module provides a withstand voltage of 1500 V AC between the output circuits and the system. This isolation specification defines the electrical separation between the field-side output and the controller system; it does not indicate independent isolation between all 16 output channels.\u003c\/p\u003e\n\u003cp\u003eThe NFAI543 is listed in Yokogawa's STARDOM FCN I\/O documentation. Its documented interface options include pressure-clamp terminal blocks and 40-pin MIL connector connections. The selected terminal arrangement must match the installed wiring hardware.\u003c\/p\u003e\n\u003ch3\u003eOutput Fallback and Maintenance\u003c\/h3\u003e\n\u003cp\u003eThe output fallback function allows each channel to retain its configured behavior when a fallback condition occurs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHOLD: Retains the existing output value.\u003c\/li\u003e\n\u003cli\u003eSETV: Outputs a predefined value.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe FCN-500 Technical Guide identifies the NFAI543 as a hot-swappable I\/O module. Replacement procedures must still follow the applicable controller configuration and system maintenance requirements.\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\u003eNFAI543-S51\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\u003eAnalog Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eSTARDOM FCN\/FCJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e4-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Isolation\u003c\/td\u003e\n\u003ctd\u003eIsolated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWithstand Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 V AC (output to system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.3% of full scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Refresh Cycle\u003c\/td\u003e\n\u003ctd\u003e10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Step Response Time\u003c\/td\u003e\n\u003ctd\u003e100 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Drift\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.01% of full scale per deg C (maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Fallback\u003c\/td\u003e\n\u003ctd\u003eHOLD \/ SETV, configurable per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHot Swap\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Options\u003c\/td\u003e\n\u003ctd\u003ePressure-clamp terminal block \/ 40-pin MIL connector\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: Can the NFAI543-S51 be replaced without rewiring the field connections?\u003c\/p\u003e\n\u003cp\u003eA: The FCN platform supports replacement of hot-swappable I\/O modules without rewiring. The replacement must have a matching terminal arrangement and compatible system configuration.\u003c\/p\u003e\n\u003cp\u003eQ: What is the difference between the NFAI543 and NFAV544?\u003c\/p\u003e\n\u003cp\u003eA: Both are 16-channel isolated analog output modules. The NFAI543 provides 4-20 mA current outputs, whereas the NFAV544 provides -10 to +10 V voltage outputs. They are not direct signal-type substitutes.\u003c\/p\u003e\n\u003cp\u003eQ: What output behavior is available during a fallback condition?\u003c\/p\u003e\n\u003cp\u003eA: The module supports HOLD and SETV. HOLD retains the existing output, while SETV applies a configured output value. The fallback behavior can be configured separately for each channel.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":68835173368050,"sku":"NFAI543-S51","price":235.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/5589\/5794\/files\/NFAI543-S512.jpg?v=1793930929","url":"https:\/\/www.petrospare.com\/products\/yokogawa-nfai543-s51-analog-output-module","provider":"Petro Spare Industrial Limited","version":"1.0","type":"link"}