AAI143-H00/A4S00 | Yokogawa | Analog Input Module

The Yokogawa AAI143-H00/A4S00 is a 16-channel isolated analog input module designed to receive 4-20 mA current signals from field transmitters. It supports HART digital communication for transmitter diagnostics and configuration. Furthermore, the module provides channel-level transmitter wiring selection, a 10 ms data update period, and input-to-system isolation rated at 1500 V AC for one minute.

Technical Specifications

Input Signal and Channel Configuration

The AAI143-H00/A4S00 receives 4-20 mA signals from field transmitters through 16 isolated input channels. Each channel measures its assigned current signal, allowing the control system to acquire multiple process variables through one module.

Furthermore, the module supports both 2-wire and 4-wire transmitter configurations. Users can select the wiring arrangement separately for each channel using the setting pin, which provides flexibility when connecting transmitters with different power supply arrangements.

HART Communication

The H00 suffix identifies the digital communication configuration with HART protocol. In addition to the analog 4-20 mA measurement signal, HART communication allows compatible field devices to exchange digital information over the current loop.

This capability supports transmitter identification, parameter access, and device diagnostics. Therefore, maintenance personnel can obtain additional field device information without relying exclusively on the analog process value.

Electrical Characteristics

The module provides input-to-system isolation rated at 1500 V AC for one minute. Its specified input resistance varies with the operating state, while the 10 ms data update period defines the interval for refreshing input data.

In addition, the transmitter power supply supports the specified voltage conditions at different loop currents, with an output current limit of 25 mA. Engineers should consider these electrical limits when checking transmitter requirements and loop configurations.

Ordering Configuration

The complete order code AAI143-H00/A4S00 identifies the HART communication configuration and pressure clamp terminal block arrangement. Buyers should retain the complete suffix when checking replacement requirements.

Frequently Asked Questions

Q: How many analog input channels does the AAI143-H00/A4S00 provide?

A: It provides 16 isolated input channels. Each channel accepts a 4-20 mA current signal.

Q: Does the AAI143-H00/A4S00 support HART communication?

A: Yes. The H00 configuration includes HART digital communication, which supports additional data exchange with compatible field transmitters alongside the analog current signal.

Q: Can the module connect to both 2-wire and 4-wire transmitters?

A: Yes. The module supports both transmitter wiring arrangements. Users select the required configuration separately for each channel using the setting pin.