AAI143-H50 S1/ATK4A-00 S1

The Yokogawa AAI143-H50 S1 is a 16-channel isolated analog input module designed to acquire 4-20 mA DC signals from field transmitters. It supports HART digital communication, allowing the control system to acquire analog process measurements while accessing additional information from compatible smart field instruments. The associated ATK4A-00 S1 is a KS cable interface adapter used for the field connection arrangement.

Input Channels and Signal Processing

The module provides 16 electrically isolated input channels for 4-20 mA DC process signals. Each channel can receive a signal from a 2-wire or 4-wire transmitter, with the transmitter type selected individually using the channel setting pin.

The module converts the incoming current signals into digital measurement values for the Field Control Station (FCS). Channel isolation separates the field input circuits from the system side, with a specified withstand voltage of 1500 V AC for one minute.

HART Communication

The H50 configuration includes HART digital communication. In addition to the primary analog measurement, compatible HART instruments can provide digital device information through the same current loop.

HART functionality has firmware requirements: module revision R3.02 or later is specified for HART support. When installed in a remote node, the EB401 firmware must be Rev. 2 or later.

Terminal Connection and Adapter

The ATK4A-00 is identified as a KS cable interface adapter for connecting the AEA4D terminal board. It provides the interface between the module-side connection and the field wiring arrangement. The adapter should be checked as part of the complete I/O connection configuration rather than treated as an additional analog input module.

Technical Specifications

Parameter	Specification
Model	AAI143-H50 S1
Associated Adapter	ATK4A-00 S1
Brand	Yokogawa
Product Type	Analog Input Module
Number of Input Channels	16, isolated
Input Signal	4-20 mA DC
Allowable Input Current	24 mA
Input Resistance (Power ON)	270-350 ohm, depending on input current
Input Resistance (Power OFF)	500 kOhm or higher
Accuracy	+/-16 uA
Data Update Period	10 ms
Input-to-System Withstand Voltage	1500 V AC, 1 minute
Transmitter Supply Voltage	19.0 V or higher at 20 mA; 25.5 V or lower at 0 mA
Transmitter Output Current Limit	25 mA
Temperature Drift	+/-16 uA per 10 deg C
Maximum Current Consumption	230 mA at 5 V DC; 540 mA at 24 V DC
Weight	0.3 kg

Frequently Asked Questions

Q: Does the AAI143-H50 S1 support HART instruments?

A: Yes. The H50 version supports HART digital communication in addition to 4-20 mA analog measurement. The specified firmware conditions are R3.02 or later for the module and Rev. 2 or later for EB401 when used in a remote node.

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

A: Yes. Both transmitter types are supported, with the selection made individually for each channel using the module setting pin.

Q: What is the function of the ATK4A-00 S1?

A: ATK4A-00 is the KS cable interface adapter associated with the AEA4D terminal board connection. It is a connection accessory, not a separate signal acquisition module.

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