Yokogawa AAI835-H50 Analog I/O Module

Overview

The Yokogawa AAI835-H50 is a 4-channel analog input/output module designed for use in CENTUM VP and CS 3000 systems. It handles 4–20 mA current signals for both input and output, offering individual channel isolation for high accuracy and noise immunity. The H50 model supports HART communication, enabling advanced diagnostics and remote configuration of connected field devices.

Technical Specifications

• Model: AAI835-H50

• Input Channels: 4 (4–20 mA, isolated)

• Output Channels: 4 (4–20 mA, isolated)

• HART Communication: Supported on all channels

• Input Resistance:

• Power ON: 290–450 Ω (depends on current)

• Power OFF: ≥500 kΩ

• Allowable Input Current: Up to 25 mA

• Transmitter Power Supply:

• Minimum: 15.0 V (at 20 mA)

• Maximum: 29.3 V (at 0 mA)

• Circuit-Open Detection (Input): Triggers when input current is less than 0.65 mA

• Accuracy:

• Input: ±16 µA

• Output: ±48 µA

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

• Withstand Voltage:

• Between input/output and system: 500 V AC for 1 minute

• Between channels: 500 V AC for 1 minute

• Power Supply:

• 5 V DC

• 24 V DC (via base module)

• Maximum Current Consumption:

• 360 mA (5 V DC)

• 450 mA (24 V DC)

• Mounting: DIN rail or panel mount

• Operating Temperature: –20°C to +70°C

• Weight: 0.2 kg