Yokogawa AAI543-H50/A4S00 Analog Output Module

Hardware Specifications

4-20 mA HART Output and Channel Isolation

The AAI543-H50/A4S00 generates 4-20 mA output signals through 16 isolated channels. Each output channel interfaces with its connected field circuit while the module maintains isolation between the output circuitry and the system side.

The module also supports HART communication. Therefore, compatible field devices can exchange digital communication data through the analog current loop while maintaining the specified 4-20 mA signal path.

The module accepts output loads from 0 to 750 ohm. In addition, it detects an open output circuit when the current falls below 0.65 mA.

For redundant operation, the module supports dual-redundant configuration with standard switch-over response.

Frequently Asked Questions

Q: How many analog output channels does the AAI543-H50/A4S00 provide?
A: It provides 16 isolated analog output channels, each using a 4-20 mA signal.

Q: What load resistance can the module drive?
A: The specified allowable load resistance is 0 to 750 ohm.

Q: Does the AAI543-H50/A4S00 support HART communication?
A: Yes. HART communication is available for the module.

Field Installation Guidelines

Install the module in the designated Yokogawa system hardware position and secure the associated terminal or connector interface before energizing the circuit.

Connect each 4-20 mA field loop according to the Yokogawa wiring documentation. Keep analog signal wiring separated from high-voltage and high-current conductors to reduce electrical interference.

For shielded signal cables, terminate and ground the shield according to the plant grounding design and Yokogawa installation requirements. Avoid creating unintended ground loops through multiple shield termination points.

When using HART communication, verify that the connected field device and loop wiring support the required HART communication path. Check the loop load before commissioning because the module specifies an allowable load resistance of 0 to 750 ohm.

For dual-redundant installation, follow the Yokogawa redundancy wiring and module-position requirements. Verify the physical connections before applying system power.