I. Basic Specifications  

Model: NFAI143-H50  

Type: 16-channel fully isolated analog input AI card with HART protocol  

Compatible Systems: Yokogawa CENTUM VP / CS3000, remote N-IO rack, ProSafe-RS safety system  

Application: Acquisition of 4–20mA signals from pressure, temperature, flow, and level transmitters  

Key Electrical Parameters  

Channels and Signals  

Channels: 16 channels, each electrically isolated  

Input Standard: 4–20mA DC (compatible with 0–20mA)  

Transmitter Power Supply: 19.0–25.5V DC; single channel supports jumper selection between 2-wire and 4-wire configurations  

Accuracy and Response  

Measurement Accuracy: ±0.02% reading ±1μA  

Temperature Drift: ±16μA/10℃  

Data Refresh Rate: 10ms  

Isolation Voltage: Input ↔ Backplane system side: 1500V AC for 1 minute  

Power Consumption and Dimensions  

Backplane power consumption at 5V: 230mA; 24V side: 540mA  

Dimensions: 130 × 107.5 × 32.8 mm, net weight ≈ 0.3 kg  

Key Features  

HART Bidirectional Communication  

Supports reading/writing smart transmitter parameters, remote calibration, fault diagnosis, and multi-variable HART data acquisition  

High-Noise Immunity Isolation  

Fully isolated per channel, eliminating crosstalk caused by high-power motors or inverters—ideal for strong electromagnetic environments in chemical plants and power stations  

Hardware Reliability  

Supports hot-swapping; modules can be replaced online without system downtime  

Redundant pairing capability to meet SIL requirements for critical control loops  

Terminal Options: Terminal block crimping or MIL-style aviation connector cable connection  

Environmental Tolerance  

Operating Temperature: -20℃ to +70℃  

Storage Temperature: -40℃ to +85℃, non-condensing, no corrosive gases  

Industry Applications  

DCS signal acquisition in oil & gas, thermal/hydroelectric power, fine chemicals, pharmaceuticals, water treatment, and papermaking processes  

Supplementary Differentiation: NFAI143 vs AAI143  

AAI143-H50: Local AI card for main rack, directly inserted into FCS main control rack  

NFAI143-H50: Dedicated AI card for N-IO remote racks, designed for distributed cabinet layouts and long-distance remote signal acquisition; identical performance, accuracy, and HART capabilities as AAI143