Product Description

The AAI835 (P/N: AAI835-S00/K4A00) is a standard analog I/O module for the Yokogawa CENTUM VP distributed control system. As the S-suffix (Standard) variant, it is designed for reliable 4–20 mA analog signal processing where HART digital communication is not required.

This configuration integrates four analog input channels and four analog output channels within a compact module. Each channel is galvanically isolated, ensuring stable operation and protection against ground loops in electrically noisy industrial environments.
The included ATK4A-00 KS cable interface adapter enables direct connection to KS cable assemblies, reducing cabinet wiring effort and improving installation reliability.

Technical Specifications

Application Use Cases

The AAI835-S00/K4A00 is commonly used in standard process control loops involving field transmitters (e.g., pressure, flow, or level) and final control elements (e.g., I/P converters or control valves).
It is well suited for cost-effective installations that do not require HART communication but still demand Yokogawa’s proven isolation, stability, and long-term reliability.

FAQ

What is the main difference between the S-suffix and H-suffix versions?
The S-suffix version supports pure analog 4–20 mA signals only. The H-suffix version adds hardware for HART digital communication.

Can this module be hot-swapped in a live CENTUM VP system?
Yes. CENTUM VP I/O modules support online replacement, provided system configuration and redundancy rules are properly followed.