Product Description

The AAI135 (P/N: AAI135-SE0) is an 8-channel analog input module engineered for the Yokogawa CENTUM VP and CS 3000 series control systems. Each channel is fully isolated, providing high-fidelity monitoring of 4 to 20 mA signals from field transmitters for pressure, temperature, flow, and other process variables.

The SE0 (“Standard”) variant is optimized for high-speed, reliable analog acquisition without HART digital communication. Its galvanic isolation ensures that signal interference, ground loops, or electrical surges on one loop do not affect other channels or the DCS system logic, making it ideal for robust industrial applications where signal integrity is critical.

Technical Specifications

Application Use Cases

• Medium-density I/O environments, such as boiler control, water treatment, and auxiliary power systems

• Situations requiring isolated analog input without HART communication

• Smaller transmitter clusters where lower channel density per module aids maintenance and safety strategies

FAQ

What is the difference between AAI135 and AAI143?

• The AAI135 provides 8 channels per module, while the AAI143 offers 16 channels. Choose AAI135 for smaller or more critical signal groups, and AAI143 for high-density monitoring.

Can this module power a 2-wire transmitter?

• The AAI135 acts as a current receiver. With proper external 24V DC power and terminal board configuration, it can monitor both 2-wire (loop-powered) and 4-wire (self-powered) transmitters.