AAI143-S00 Yokogawa Analog Input Module

The Yokogawa AAI143-S00 is a 16-channel isolated analog input module that receives 4-20 mA signals from field transmitters for process measurement and control. It supports individual 2-wire or 4-wire transmitter configuration and provides a 10 ms data update period. The module also supplies transmitter power and specifies a 1500 V AC withstand voltage between the input circuits and the system for 1 minute.

Technical Specifications

Signal Processing and Transmitter Interface

The AAI143-S00 receives current signals from field transmitters and makes the measurement data available to the control system. Its 16 isolated input channels support multiple analog measurement points within one module. The specified 10 ms data update period defines the interval for refreshing input data.

The module provides transmitter power with a specified output current limit of 25 mA. Its input resistance varies with the input current when power is on, while the specified resistance increases to at least 500 kohm when power is off. These characteristics should be considered when checking transmitter compatibility and input circuit behavior.

Accuracy and Electrical Conditions

The module specifies an accuracy of +/- 16 uA and an accuracy drift of +/- 16 uA per 10 deg C change in ambient temperature. These values help engineers assess measurement requirements across the intended operating temperature range. The supplied specifications do not define the complete reference conditions for the accuracy figures.

The input-to-system withstand voltage is rated at 1500 V AC for 1 minute. This is a withstand-voltage specification, not a continuous operating voltage rating. The module's power consumption figures are maximum current values at the stated 5 V DC and 24 V DC supply rails.

Frequently Asked Questions

Q: How many analog signals can the AAI143-S00 receive?

A: It provides 16 isolated input channels for 4-20 mA analog signals. Confirm the transmitter wiring and channel configuration before commissioning.

Q: Can the AAI143-S00 support both 2-wire and 4-wire transmitters?

A: The specifications identify individual 2-wire or 4-wire transmitter settings. Verify the intended wiring arrangement and transmitter power requirements for each application.

Q: What does the 1500 V AC withstand-voltage rating mean?

A: It specifies a withstand test between the input and system for 1 minute. It should not be interpreted as the normal operating voltage or as a substitute for checking the installation's insulation requirements.