Product Overview

The Yokogawa AAI835-H00 is an analog I/O module for distributed control systems. It provides 4-channel input and 4-channel output at 4 to 20 mA. This module features fully isolated channels for signal integrity. The Yokogawa AAI835-H00 supports HART communication for digital data exchange. Users trust this module for precise analog signal processing in Yokogawa systems.

Technical Specifications

The AAI835-H00 delivers accurate analog I/O with channel isolation. Below are the complete technical details.

General Specifications

• Manufacturer: Yokogawa for industrial automation reliability.

• Product Type: Analog I/O Module (4 to 20 mA, 4-channel input/4-channel output).

• Product Number: AAI835-H00 for precise identification.

• Model Designation: AAI835 Analog I/O Module with isolated channels.

• Suffix Code H: With digital communication (HART protocol).

• Suffix Code 5: With no explosion protection.

• Suffix Code 0: Basic type configuration.

• Weight: Approx. 0.30 kg for lightweight installation.

I/O Channel Configuration

• Number of I/O Channels: 4-channel input and 4-channel output.

• Channel Isolation: Fully isolated channels between input and output.

• Input Signal: 4 to 20 mA standard analog signal.

• Output Signal: 4 to 20 mA standard analog signal.

• Allowable Input Current: 25 mA maximum before damage.

Voltage Withstanding and Isolation

• Between Input/Output and System: 500 V AC for 1 minute.

• Between Input/Output Channels: 500 V AC for 1 minute.

• Isolation Quality: Ensures no ground loops or crosstalk.

• Safety Margin: Robust isolation for industrial environments.

Input Resistance Specifications

• Power ON (at 20 mA): 290 Ω typical.

• Power ON (at 4 mA): 450 Ω typical.

• Power OFF Condition: 500 kΩ or larger for high impedance.

• Circuit-Open Detection: Triggers below 0.65 mA.

Output and Load Specifications

• Allowable Load Resistance: 0 to 750 Ω for output channels.

• Transmitter Power Supply (at 20 mA): 15.0 V or higher.

• Transmitter Power Supply (at 0 mA): 29.3 V or less.

• Power Capability: Sufficient for most 2-wire transmitters.

Accuracy and Performance

• Input Accuracy: ±16 µA for precise current measurement.

• Output Accuracy: ±48 µA for accurate current generation.

• Data Update Period: 10 ms for fast process response.

• Temperature Drift: ±16 µA per 10°C change.

• Thermal Stability: Reliable across varying temperatures.

Power Consumption

• Maximum Current at 5 V DC: 360 mA.

• Maximum Current at 24 V DC: 450 mA.

• Total Power: Moderate consumption for analog I/O density.

External Connection Options

• Pressure Clamp Terminal: For secure field wiring.

• MIL Connector Cable: For high-density connections.

• Dedicated Cable (KS1): For Yokogawa system integration.

• Terminal Boards: AEA4D and AEA3D compatible.

• Adapter Options: ATK4A and ATB3A for flexible mounting.

• Single Configuration: ATI3S for non-redundant setups.

• Dual Redundant Configuration: ATI3D for high availability.

HART Communication

• HART Communication: Available on this model.

• Suffix Code H: Indicates HART protocol support.

• Digital Data: Overlays on 4-20 mA analog signal.

• Device Configuration: Allows remote parameter adjustment.

• Compatibility: Works with HART-enabled field devices.

Installation Guide

Follow these steps to install the Yokogawa AAI835-H00 correctly.

1. Power Down the System: Turn off all power to the I/O rack.

2. Locate the Slot: Find an available slot in the Yokogawa base plate.

3. Insert the Module: Slide the AAI835-H00 into the slot until seated.

4. Secure the Module: Lock the module using the retaining mechanism.

5. Install Terminal Board: Mount AEA4D or AEA3D terminal board for wiring.

6. Connect Cables: Use KS1 dedicated cable or MIL connector as needed.

7. Wire Inputs: Connect 4-20 mA transmitter signals to input channels.

8. Wire Outputs: Connect actuator or I/P converter to output channels.

9. Check Load Resistance: Ensure output load stays within 0 to 750 Ω.

10. Apply Power: Turn on the system power to the I/O rack.

11. Verify Status: Check module LED indicators for proper operation.

12. Test HART Communication: Confirm digital communication on HART channels.

13. Calibrate if Needed: Verify input accuracy of ±16 µA and output accuracy of ±48 µA.

14. Set Redundancy: For dual redundant configuration, install second module with ATI3D.

Installation Notes

• The module provides 4-channel input and 4-channel output.

• Channel isolation is 500 V AC between all ports.

• Data update period is 10 ms for fast loop response.

• Temperature drift is ±16 µA per 10°C.

• Circuit-open detection triggers below 0.65 mA.

Packaging List

This unit ships as a new and original product.

• Yokogawa AAI835-H00 Analog I/O Module

• Product data sheet with terminal assignments

• HART communication guide

• Anti-static factory packaging box

Frequently Asked Questions (FAQ)

1. What is the update period for the AAI835-H00 module?
The Yokogawa AAI835-H00 has a data update period of 10 ms. This provides fast response for control loop applications.

2. Does this module support HART communication?
Yes, the AAI835-H00 with suffix code H supports HART protocol. Digital data overlays on the 4-20 mA analog signal for device configuration.

3. What is the channel isolation rating on this analog module?
The Yokogawa AAI835-H00 provides 500 V AC for 1 minute isolation. This applies between input/output and system, and between channels.

4. What terminal boards are compatible with the AAI835-H00?
The AAI835-H00 works with AEA4D and AEA3D terminal boards. It also supports ATK4A and ATB3A adapters for flexible wiring.

5. What is the input accuracy of the AAI835-H00?
The input accuracy on Yokogawa AAI835-H00 is ±16 µA. The output accuracy is ±48 µA for reliable analog signal processing.