Yokogawa AAI143: 16-Channel Analog Input Module

Overview

The Yokogawa AAI143 is a high-performance analog I/O module that supports HART communication. It efficiently communicates with field devices, capturing analog data and HART variables. These are then stored in the Input/Output image area within the module. The AAI143 seamlessly integrates with Field Control Systems (FCS), which access and set the I/O image through the analog I/O module. This module allows the FCS to utilize field device data via I/O terminals, just as it does with other analog or digital I/O signals. Designed for reliability and precision, the AAI143 ensures stable operation in demanding industrial environments.

Key Features

16 Isolated Input Channels: The AAI143 features 16 isolated input channels, offering enhanced safety and signal integrity, even in noisy industrial environments.
Wide Input Signal Range: This module accepts input signals in the 4-20 mA range, commonly used in industrial applications for measuring various process variables.
High Voltage Withstanding: With the ability to withstand up to 1500 V AC for 1 minute between the input and system, the AAI143 ensures superior protection against electrical surges.
Precision and Accuracy: With an accuracy of ±16 μA, the module ensures precise measurement of analog signals, making it ideal for critical applications.
Advanced HART Communication: It integrates HART communication, allowing for advanced diagnostics, device configuration, and more reliable communication between field devices and the control system.
Power Supply Flexibility: The module can support 2-wire or 4-wire transmitters, and provides a minimum of 19.0 V at 20 mA input.
Fast Data Update: The AAI143 offers a 10 ms data update period, ensuring rapid and timely signal transmission.

Technical Specifications

Specification	Details
Model	AAI143
Number of Input Channels	16 Isolated Channels
Input Signal	4 to 20 mA
Allowable Input Current	24 mA
Withstanding Voltage	1500 V AC (for 1 minute)
Input Resistance (Power ON)	270 Ω (at 20 mA), 350 Ω (at 4 mA)
Input Resistance (Power OFF)	500 kΩ or larger
Accuracy	±16 μA
Data Update Period	10 ms
Transmitter Power Supply	19.0 V (min) at 20 mA, 25.5 V (max) at 0 mA
Drift due to Ambient Temperature	+16 μA per 10°C
Maximum Current Consumption	230 mA (5 V DC), 540 mA (24 V DC)
Weight	0.3 kg
External Communication	Pressure Clamp Terminal, MIL Connector Cable, Dedicated Cable (KS1)
HART Communication	Available

Applications

Process Control: Ideal for acquiring signals from field devices in various process control applications.
Automation Systems: Integrates with Yokogawa’s CENTUM VP and ProSafe-RS systems for industrial automation and control.
Measurement and Monitoring: Supports accurate measurement and monitoring of various process variables like temperature, pressure, and flow.

Conclusion

The Yokogawa AAI143 provides reliable and accurate analog input signal conversion with advanced features like HART communication and high voltage withstand capabilities. With its 16 isolated channels, it ensures safe and precise data acquisition for industrial automation systems, making it the ideal choice for critical applications in process control and measurement.