Product Description

The AAI141-S00/K400 is a high-speed analog input (A/D conversion) module engineered for Yokogawa industrial control systems, including the CENTUM VP DCS. It functions as a high-fidelity interface between field instrumentation and the control system, converting 4–20 mA analog signals into precise 16-bit digital data for real-time monitoring and control.

The /K400 variant is specifically optimized for the industry-standard 4–20 mA current loop, ensuring seamless integration with process transmitters in demanding industrial environments.

Key Features

• High-Speed Conversion: 2 ms conversion cycle for fast-changing process variables

• High Precision: 16-bit resolution with ±0.1% full-scale accuracy

• Robust Electrical Isolation: Protects system backplane from field-side noise and interference

• Industrial-Grade Design: Stable operation in harsh cabinet environments from –20°C to +60°C

Technical Specifications

Industrial Applications

The AAI141-S00/K400 is widely used in high-speed and high-accuracy process control applications, including:

• Petrochemical and refining systems

• Pharmaceutical manufacturing plants

• Power generation and utility control

Typical measurements include pressure transients, rapid flow changes, and temperature gradients, where fast conversion time and high resolution are essential for system safety and control performance.

Technical FAQ

Q: Does the AAI141-S00/K400 support voltage input signals?
A: No. The /K400 suffix indicates that this module is pre-configured and optimized specifically for 4–20 mA current inputs.

Q: What is the benefit of 16-bit resolution in this module?
A: 16-bit resolution provides 65,536 discrete measurement levels, enabling fine-grained signal resolution for precise PID control and high-accuracy data logging.