Yokogawa AAI835-S00/K4A00 Analog I/O Module

Overview

The Yokogawa AAI835-S00/K4A00, also cataloged as the AAI835 Analog I/O Module, converts field analog signals into internal control data and internal data into analog output signals within Yokogawa ESB bus node and FIO field control unit systems. The module supports HART communication for directly connected HART devices.

Hardware Specifications

4-20 mA HART Communication and Channel Isolation

The AAI835-S00/K4A00 receives standardized analog field signals and converts them into internal data for control-station processing. It also performs the reverse conversion from internal data to analog field signals where applicable to the configured I/O function.

The HART-enabled configuration incorporates HART modems. Therefore, the module can communicate directly with connected HART field devices while processing the associated analog signal.

The module supports up to 16 HART devices per module and up to 32 HART variables. The control system can treat HART variables as ordinary process input data through the I/O connection.

For HART multidrop operation, the module supports a maximum of 5 input devices per channel. This multidrop mode accepts input devices only and does not support analog data values or burst-mode operation.

The specified HART variable refresh time is 1 second per device. When 16 HART devices connect to an ESB bus connection, the complete refresh cycle reaches approximately 17 seconds.

Frequently Asked Questions (FAQ)

Q: How many HART devices can the AAI835-S00/K4A00 support?
A: The module supports a maximum of 16 HART devices. It also supports up to 32 HART variable points per module.

Q: Does HART multidrop support analog values and burst communication?
A: No. HART multidrop supports input devices only and does not support analog data values or burst functionality.

Q: Which Yokogawa node and control units support this module?
A: The supplied specifications identify ANB10S, ANB10D, ANB11S, ANB11D, AFV30S, AFV30D, AFV40S, AFV40D, AFV10S, and AFV10D as supported units.

Field Installation Guidelines

• Install the module in the designated ESB bus node unit or FIO field control unit according to the Yokogawa system hardware configuration.
• Verify the module model and suffix before installation.
• Confirm field wiring polarity and signal assignments against the applicable Yokogawa wiring documentation.
• Keep analog signal wiring separated from high-voltage power wiring and high-current switching circuits.
• Route HART signal wiring according to the transmitter manufacturer’s wiring requirements.
• Use appropriate cable shielding and terminate shields according to the site grounding design and Yokogawa installation instructions.
• Check channel assignments before connecting field transmitters to prevent signal routing errors.
• For HART multidrop installations, verify that only supported input devices are connected to each multidrop channel.
• After installation, verify analog signal integrity and HART communication before placing the channel into process service.

Customers Also Viewed

Contact: Manski Wong +86 18030205725 manski@cambia.cn