AAI135-H50/13S00 | Yokogawa | Analog Input Module

The Yokogawa AAI135-H50/13S00 is an 8-channel analog input module designed to acquire isolated 4-20 mA current signals from field instruments. It supports HART digital communication, allowing the control system to receive analog process measurements while retaining access to compatible HART device information. Furthermore, its pressure-clamp terminal block provides connection points for isolated analog signals.

Key Features

• 8 isolated analog input channels for 4-20 mA signals.
• HART protocol support for digital communication with compatible field instruments.
• Maximum allowable input current of 25 mA.
• 500 V AC withstand voltage between input and system.
• 500 V AC withstand voltage between input channels.
• Pressure-clamp terminal block for isolated analog signal connections.

Technical Specifications

Signal Processing and HART Communication

The module acquires 4-20 mA signals from field transmitters and supplies the corresponding analog measurements to the control system. Each of its eight inputs is isolated, which helps separate individual signal circuits and limits the transfer of electrical interference between channels.

In addition, HART communication supports digital data exchange with compatible field instruments over the analog current loop. Therefore, the module supports both process signal acquisition and digital instrument communication.

Terminal Block and Electrical Isolation

The AAI135-H50/13S00 uses a pressure-clamp terminal block identified as ATI-00 for isolated analog signal connections. Its specified withstand voltage is 500 V AC for one minute, both between the input and system and between input channels.

Furthermore, the two isolation conditions describe different electrical boundaries. They should be considered separately when checking wiring arrangements and system integration requirements.

Model Configuration

The model designation identifies several configuration characteristics:

Frequently Asked Questions

Q: How many analog input channels does the AAI135-H50/13S00 provide?

A: It provides eight isolated analog input channels, each designed for 4-20 mA current signals.

Q: Does the AAI135-H50/13S00 support HART communication?

A: Yes. The H configuration supports HART digital communication with compatible field instruments, alongside the 4-20 mA analog input signal.

Q: What terminal block does this module use?

A: This configuration specifies a pressure-clamp terminal block identified as ATI-00 for isolated analog signal connections.