Product Description

The AAI141-H50 is a high-precision analog input module designed for Yokogawa CENTUM VP and CENTUM CS 3000 Field Control Stations. It supports 16 channels of 4–20 mA DC input, delivering accurate and stable process data to the Distributed Control System (DCS).

A key feature of the AAI141-H50 is HART digital communication support, enabling remote diagnostics, device configuration, and access to advanced data from intelligent field transmitters without affecting the analog signal. The module is optimized for high-reliability applications and supports dual-redundant configurations with standard switch-over performance.

The H50 designation indicates suitability for non-explosion-protected environments. Each input channel is isolated from the system logic, protecting the control network from electrical noise, ground loops, and field-side disturbances.

Technical Specifications

Application and Integration

The AAI141-H50 is commonly used to monitor pressure, flow, temperature, and level transmitters in industrial process plants. Compared to the AAI143 series, the AAI141 is typically selected when transmitters are externally powered or when specific loop impedance characteristics are required by the system design.

When installed as a redundant pair on a compatible FIO node, the module is hot-swappable, allowing maintenance or replacement without interrupting process operation.

Frequently Asked Questions

Q: What is the main difference between the AAI141-H50 and the AAI143?
A: Both are 16-channel analog input modules, but the AAI143 includes an integrated transmitter power supply for 2-wire loops. The AAI141 is intended for applications where loop power is supplied externally or via alternate terminal configurations.

Q: Is the AAI141-H50 suitable for corrosive (G3) environments?
A: No. This is the standard (non-coated) version. For corrosive atmospheres, an S50 conformal-coated variant should be specified.