NFAI143-H50

Overview

The Yokogawa NFAI143-H50 is a 16‑channel analog input module designed for isolated current signal measurement. It supports HART communication and provides reliable performance for industrial automation systems.

Module Configuration

• Model: NFAI143 (Analog Input Module, 16‑channel, isolated, 4 to 20 mA)

• Suffix –H: With HART communication

• Suffix 5: With no explosion protection

• Suffix 0: Basic type

Input Specifications

• Number of Input Channels: 16, isolated

• Input Signal: 4 to 20 mA

• Allowable Input Current: 24 mA

• Withstanding Voltage: Between input and system: 1500 V AC for 1 minute

• Overcurrent Protection: Provided

• Input Resistance (Power ON): 250 Ω

• Input Resistance (Power OFF): 500 kΩ or more

• Accuracy: ±0.1% of full scale

• Data Refresh Cycle: 10 ms

• Input Step Response Time: 100 ms

• Transmitter Power Supply: 24.0 to 25.5 V (output current limit: 25 mA)

• Transmitter Setting: 2‑wire or 4‑wire selectable per channel

• Temperature Drift: Max. ±0.01%/°C

Electrical Characteristics

• Maximum Current Consumption (5 V DC): 230 mA

• Maximum Current Consumption (24 V DC): 540 mA

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