AAI835-H50 Yokogawa Analog I/O Module

The Yokogawa AAI835-H50 is an isolated analog I/O module with 4 input channels and 4 output channels, supporting 4-20 mA current signals. It provides bidirectional analog signal handling within a control system, allowing field signal inputs and analog output commands to share one module. Furthermore, the H suffix identifies the HART digital communication option, while the H50 configuration specifies the basic type without explosion protection.

Key Features

• 4-channel analog input and 4-channel analog output.
• Supports 4-20 mA input and output signals.
• Isolated channels with 500 V AC withstand voltage.
• HART digital communication option.
• Supports KS1 dedicated cable connection.
• Provides input and output signal handling in one module.

Technical Specifications

Analog Input and Output Functions

The AAI835-H50 combines four analog input channels and four analog output channels in one module. The input channels receive 4-20 mA signals from field devices, while the output channels transmit corresponding current signals to external equipment.

In addition, the isolated channel configuration separates the analog signal circuits according to the specified isolation conditions. This arrangement supports signal handling between field devices and the control system while maintaining the specified electrical isolation.

HART Communication

The H suffix identifies the digital communication option using the HART protocol. Therefore, the module supports HART-enabled analog signal applications alongside its 4-20 mA signal handling.

Meanwhile, the analog output circuit supports open-circuit detection below 0.65 mA, providing a specified current threshold for identifying an output circuit condition.

Ordering Configuration

The AAI835 model uses the following suffix options:

The supplied model AAI835-H50 identifies the HART communication option, the configuration without explosion protection, and the basic type. These configuration details should be considered when selecting a replacement or checking an existing installation.

Frequently Asked Questions

Q: How many analog channels does the AAI835-H50 provide?

A: It provides four analog input channels and four analog output channels. Both input and output circuits support 4-20 mA signals.

Q: Does the AAI835-H50 support HART communication?

A: Yes. The H suffix identifies the HART digital communication option, allowing the module to support HART-based analog signal applications.

Q: Is the AAI835-H50 suitable for explosion-protected installations?

A: No. The 5 configuration code identifies the version without explosion protection. Applications requiring explosion protection need the appropriate E configuration.