AAI543-H50 S1/ ATK4-00 S1

The Yokogawa AAI543-H50 S1/ ATK4-00 S1 is a 16-channel isolated analog output configuration designed to transmit 4-20 mA control signals from a Yokogawa control system to compatible field devices. It supports HART communication and standard-response dual-redundant operation. The complete model designation identifies the supplied module and associated terminal interface configuration.

Functional Description

The AAI543-H50 S1/ ATK4-00 S1 converts digital control commands into individual 4-20 mA analog output signals. These signals are used to control compatible field devices, including valve positioners and other current-input equipment.

Each output channel is electrically isolated to separate the field output circuits from the system side.

HART Communication

The module supports HART communication over the 4-20 mA current loop, allowing compatible smart field instruments to exchange digital device information while retaining the analog signal for process control.

The circuit-open detection threshold is below 0.65 mA, providing diagnostic information when an output loop is disconnected or interrupted.

Redundant Operation

The standard-response configuration supports dual-redundant operation. During module switchover, the output current may fall below 4 mA for up to 100 ms.

This response characteristic should be considered when selecting the module for field devices with fast response requirements.

Technical Specifications

Parameter	Specification
Model	AAI543-H50 S1/ ATK4-00 S1
Brand	Yokogawa
Product Type	Isolated Analog Output Module
Number of Output Channels	16
Output Signal	4-20 mA DC
Channel Isolation	Isolated
HART Communication	Available
Allowable Load Resistance	0 to 750 ohm
Circuit-Open Detection	Less than 0.65 mA
Output Accuracy	+/-48 uA
Data Update Period	10 ms
Temperature Drift	+/-16 uA/10 deg C
Withstanding Voltage	1500 V AC for 1 minute, output to system
Maximum Current Consumption	230 mA (5 V DC), 540 mA (24 V DC)
Weight	0.4 kg

Terminal Interface and Configuration

The ATK4-00 S1 designation is retained as part of the complete supplied model identification. The terminal interface and associated cable arrangement should be checked against the installed Yokogawa FIO hardware before ordering a replacement.

Frequently Asked Questions

Q: How many output channels does the AAI543-H50 S1/ ATK4-00 S1 provide?

A: The AAI543 output module provides 16 isolated 4-20 mA analog output channels.

Q: Does this configuration support HART communication?

A: Yes. It supports HART communication with compatible smart field instruments over the analog current loop.

Q: Can this configuration be used in a redundant system?

A: The AAI543-H50 S1 supports standard-response dual redundancy. During switchover, the output may fall below 4 mA for up to 100 ms.

---