Yokogawa NFAI143‑H00 16‑Channel Isolated Analog Input Module

The Yokogawa NFAI143‑H00 is a 16‑channel isolated 4‑20mA analog input module for the Stardom FCN/FCJ autonomous controller system. It converts analog current signals from field transmitters into digital data for DCS process monitoring and closed‑loop regulation.

This rack‑mounted I/O module features channel‑to‑system galvanic isolation and built‑in diagnostic LEDs. Original production has been discontinued. It is widely stocked as aftermarket spare parts for petrochemical, power and water plant DCS maintenance and system retrofitting.

Main Specifications

1. Brand: Yokogawa; Model:NFAI143‑H00; Type:Isolated Analog Input Module
2. Applicable System:Stardom FCN/FCJ DCS, 16 channels, input signal:4‑20mA
3. Isolation & Accuracy:Galvanic isolation, measurement accuracy up to ±0.1% full scale
4. External Connection:Pressure clamp terminal block or 40‑pin MIL connector cable
5. Status Indication:STATUS and ACT LED lamps for hardware and channel activity diagnosis
6. Operating Temperature:‑10℃ ~ +55℃, rugged design for industrial control cabinets
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Collect 4‑20mA analog signals from pressure, flow, level and temperature transmitters.
2. Provide electrical isolation to suppress common‑mode interference and protect the DCS backplane.
3. Carry out high‑precision A/D conversion and transmit digital values to the FCN controller.
4. Onboard self‑diagnosis and LED status display for quick fault detection and troubleshooting.
5. Support two‑wire transmitter power supply and over‑current protection for field loops.
6. Act as the analog signal front‑end acquisition unit of Yokogawa Stardom DCS system.

Application Scenarios

1. Process data acquisition for petrochemical, thermal power and water treatment DCS control systems.
2. Spare module replacement and routine maintenance of Yokogawa Stardom FCN/FCJ racks.
3. Automation renovation and reliability upgrade of legacy industrial process control cabinets.
4. On‑site troubleshooting and replacement of faulty analog input modules on running production units.
5. Spare‑parts stocking for system integrators and DCS automation maintenance contractors.
6. Global aftermarket spare supply for technicians maintaining obsolete Yokogawa Stardom hardware.

FAQ

1. Q:Which DCS platform does NFAI143‑H00 belong to?
   A:It belongs to Yokogawa Stardom FCN/FCJ autonomous controller I/O series.
2. Q:What input signal does this module accept?
   A:It is designed for standard 4‑20mA current signals widely used in process transmitters.

3. Q:Is this module still in original production?
   A:Yokogawa has discontinued this model, only tested surplus and refurbished spare units are available.