Yokogawa AAI143-H50/A4S10 Analog Input Module

The Yokogawa AAI143-H50/A4S10 is a 16-channel isolated analog input module designed to receive 4-20 mA DC signals from field transmitters. It provides channel isolation, HART digital communication and configurable support for 2-wire or 4-wire transmitters. This model includes a pressure clamp terminal block with a surge absorber, providing a defined terminal configuration for field signal connections.

Technical Specifications

Input Signal and Channel Configuration

The AAI143 provides 16 isolated input channels for 4-20 mA DC current signals. Each channel receives an analog measurement from a field transmitter, allowing the control system to process multiple process variables through one module.

Furthermore, the module supports both 2-wire and 4-wire transmitter configurations. Users can select the transmitter type separately for each channel using the setting pin. The built-in transmitter power supply supports 2-wire transmitter connections within the specified voltage and current limits.

HART Communication

The H50 suffix identifies the version with digital communication using the HART protocol. In addition to the 4-20 mA analog measurement signal, HART provides a digital communication channel for supported field device information.

This configuration allows analog process measurements and digital device communication to share the same current loop, subject to the connected transmitter and system configuration.

Terminal Block Configuration

The A4S10 option specifies a pressure clamp terminal block with a surge absorber, model ATA4S-10. This terminal configuration is part of the complete ordering code and should be considered when checking replacement requirements.

In addition, the terminal block configuration should match the existing field wiring arrangement before ordering a replacement module.

Model Suffix Identification

Frequently Asked Questions

Q: How many analog input channels does the AAI143-H50/A4S10 support?

A: It supports 16 isolated analog input channels, each accepting a 4-20 mA DC signal.

Q: Does the AAI143-H50/A4S10 support HART communication?

A: Yes. The H50 suffix identifies the HART digital communication version, which supports digital communication alongside the analog 4-20 mA signal.

Q: What is the difference between A4S10 and A4S00?

A: Both options use a pressure clamp terminal block. The A4S10 version includes a surge absorber (ATA4S-10), whereas A4S00 identifies the pressure clamp terminal block without the specified surge absorber (ATA4S-00).