Product Description

The AAI835-H50/K4A00 is a hybrid analog I/O module for the Yokogawa CENTUM VP and CS 3000 control systems. It combines four analog input channels and four analog output channels in a single module, all supporting 4–20 mA signals with full point-to-point isolation to ensure stable and interference-free operation.

The module features built-in HART communication, enabling bidirectional digital data exchange with smart field devices for diagnostics, parameter access, and secondary variable monitoring. Supplied with the ATK4A-00 interface adapter, the AAI835-H50/K4A00 uses a KS cable connection, simplifying wiring and improving cabinet density and maintainability.

Technical Specifications

Application

The AAI835-H50/K4A00 is ideal for applications where both measurement and control are required within a compact footprint, including:

• Skid-mounted process systems

• Local pump and valve control stations

• Auxiliary control panels with limited I/O space

Its hybrid design reduces module count while preserving HART-level visibility for diagnostics and maintenance.

Frequently Asked Questions

Can the AAI835-H50/K4A00 handle high-voltage signals?
No. The module is strictly designed for 4–20 mA current loops. Channel voltage must remain within the 500 V AC isolation rating.

Does the ATK4A-00 support redundant KS cabling?
No. The ATK4A-00 provides a single KS cable interface. Redundant configurations require compatible baseplates and module arrangements verified at the system level.