Yokogawa AAI135: 8-Channel Analog Input Module

Overview of the Yokogawa AAI135

The Yokogawa AAI135 is an 8-channel analog input module designed for precise signal acquisition in industrial automation systems. It supports 4 to 20 mA current inputs and is part of the CENTUM VP family, providing seamless integration into control systems. This module is ideal for various applications such as process control, factory automation, and measurement testing.

Key Specifications of the Yokogawa AAI135

Specification	Details
Input Range	4 to 20 mA current input
Number of I/O Channels	8 isolated input channels
Input Signal	4 to 20 mA
Accuracy	+10 µA
Data Update Period	40 ms
Input Impedance	Varies with current strength (refer to datasheet)
Withstanding Voltage	High voltage isolation for enhanced safety
Power Supply	24 VDC or 5 VDC (max. 300 mA and 450 mA)
Maximum Load Resistance	1 kΩ
Transmitter Power Supply	Powers connected 2-wire transmitters
Temperature Drift	Minimal drift with temperature variations
Weight	0.5 kg
External Connection	Pressure clamp terminal or M12 connector cable
HART Communication	Supports HART protocol for advanced diagnostics (available in some configurations)

Key Features of the Yokogawa AAI135

High Measurement Accuracy: The AAI135 ensures precise measurements, with a typical accuracy of ±0.05%. This accuracy guarantees reliable data for process control.
Wide Input Range: The module supports a variety of analog signals, ranging from millivolts to volts. This makes it highly versatile in diverse industrial environments.
Multiple Input Types: You can configure the AAI135 for voltage, current, or RTD inputs, making it adaptable to numerous systems.
Programmable Filters: The module features programmable filters that help remove noise from input signals. As a result, you get cleaner, more stable data.
Alarm Functions: The AAI135 includes built-in alarms, enabling operators to quickly respond to abnormal conditions. This feature enhances safety and operational efficiency.
Reliability and Durability: Designed to withstand challenging environments, the AAI135 is built to last, ensuring long-term, trouble-free operation.

Dimensions and Power Requirements

Dimensions: 22.5 mm (W) x 100 mm (H) x 60 mm (D)
Power Supply: 24 VDC or 5 VDC, consuming 10 W of power.
Operating Temperature Range: The module functions effectively between -20°C and 60°C.

Applications of the Yokogawa AAI135

The Yokogawa AAI135 serves a variety of industries and applications, such as:

Process Control: It plays a crucial role in controlling and monitoring industrial processes, ensuring reliable and accurate data.
Factory Automation: This module optimizes production lines, machinery, and assembly processes, improving operational efficiency.
Measurement and Testing: The AAI135 is ideal for laboratory testing, sensor calibration, and other measurement tasks that require precise analog-to-digital conversion.

Conclusion

In conclusion, the Yokogawa AAI135 is an 8-channel analog input module designed to deliver high accuracy and versatility in industrial automation applications. Whether you are managing process control, factory automation, or measurement testing, the AAI135 ensures reliable and precise performance. Thanks to its wide input range, built-in alarms, and durable design, this module proves itself as an essential component in any automation system.