The NFAI143-H00 is a 16-channel isolated analog input module specifically designed by Yokogawa Electric Corporation (Japan) for industrial automation. It is a core I/O component of the Yokogawa Centum VP/VX series distributed control systems (DCS). Its core function is to convert the 4-20mA continuous current signals output by on-site sensors into digital signals with high precision, and transmit them to PLC or DCS systems, providing reliable data support for process control in industries such as chemical engineering, electric power, and metallurgy.
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Core Technical Specifications
YOKOGAWA NFAI143-H00 has standardized technical parameters that meet strict industrial control requirements with performance verified by Yokogawa official documentation- Number of Input Channels: 16 channels with isolated design to avoid mutual interference between channels
- Input Signal Type: 4 to 20 mA DC current signal
- Allowable Input Current: Maximum 24 mA
- Withstanding Voltage: 1500 V AC between input and system for 1 minute When using KMS40 MIL connector cable the withstanding voltage is 500 V AC for 1 minute
- Overcurrent Protection: Equipped with overcurrent protection function to prevent module damage caused by excessive input current
- Input Resistance: 250 Ω when power is ON 500 kΩ or more when power is OFF
- Measurement Accuracy: ±0.1% of full scale ensuring high precision signal acquisition
- Data Refresh Cycle: 10 ms realizing real time signal collection and update
- Input Step Response Time: 100 ms ensuring timely response to signal changes
- Transmitter Power Supply: 24.0 to 25.5 V DC with output current limit of 25 mA
- Temperature Drift: Maximum ±0.01% per °C minimizing measurement errors caused by ambient temperature changes
- Maximum Current Consumption: 230 mA for 5 V DC 540 mA for 24 V DC
- Operating Temperature Range: -20°C to +60°C adapting to various industrial site environments
- Weight: Approximately 0.3 kg facilitating installation and transportation
- External Connection: Pressure clamp terminal and MIL connector cable supported
- HART Communication: Equipped with HART communication function compatible with HART protocol field devices
- Power Supply Requirement: 24 V DC must be supplied to the analog field power supply terminal of the power supply module when in use
Key Technical Features
YOKOGAWA NFAI143-H00 integrates multiple advanced technical features to meet the high reliability and precision requirements of industrial process control- Isolated Design: Adopts 16 channel isolated structure which effectively isolates input signals from the system and suppresses electromagnetic interference improving the stability and reliability of signal acquisition
- HART Communication Function: The HART suffix enables bidirectional communication with HART transmitters allowing not only acquisition of process variables but also configuration and diagnosis of field devices without interrupting normal operation
- High Measurement Precision: With ±0.1% full scale accuracy and low temperature drift the module ensures precise collection of analog signals laying a foundation for accurate process control
- Overcurrent Protection: Built in overcurrent protection mechanism can quickly respond to excessive input current preventing module damage and ensuring system safety
- Flexible Transmitter Matching: Supports both 2 wire and 4 wire transmitters which can be set for each channel by pin configuration adapting to different field device connection requirements
- Standardized Installation: Compatible with pressure clamp terminal and MIL connector cable with consistent external dimensions with other Yokogawa analog I/O modules facilitating system expansion and maintenance
- Intrinsic Safety Adaptability: Zener barrier is not allowed to be connected When used in intrinsically safe applications isolation barrier must be used meeting the safety requirements of hazardous areas
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