Yokogawa AAI835-H53 Analog I/O Module Rave reviews

Overview
The Yokogawa AAI835-H53 is a high-performance analog input/output module designed for advanced process control systems. Manufactured by Yokogawa Electric Corporation, Japan, this version supports isolated 4-20 mA input and output channels, offers HART protocol communication, and is optimized for wider temperature range and robust industrial environments.

General Information
Manufacturer: Yokogawa Electric Corporation
Country of Origin: Japan
Part Number: AAI835-H53
Product Name: AAI835 Analog I/O Module
Series: AAI835 Series
Product Type: Analog Input/Output Module (Isolated)
Channel Configuration: 4 input channels + 4 output channels
Mounting: Rack-mounted I/O module
Application: Industrial automation, DCS integration, process monitoring and control

Power Specifications
Supply Voltage: 24 V DC (typical)
Power Consumption: Approx. 3–7 W (varies by configuration)
Allowable Input Current: Up to ~25 mA per channel (4–20 mA loop)
Protection: Overvoltage, reverse-polarity and surge protection built in

Communication & Interface
Signal Type: 4–20 mA analog input and output
Interface: Rack-mounted module connecting to Yokogawa system bus
Data Update Rate: Approx. 10 ms
Isolation: Each channel isolated from system bus and between channels
Diagnostics: Channel fault detection, open-wire detection, HART communication support

Environmental
Operating Temperature: −20 °C to +70 °C (wide-temperature version)
Storage Temperature: −20 °C to +85 °C
Relative Humidity: 5% to 95% RH, non-condensing
Vibration Resistance: 10–60 Hz, amplitude ±0.1 mm (typical)
Protection Class: IP20 (when installed in a control cabinet)

Dimensions & Weight
Dimensions: 107.5 × 32.8 × 130 mm
Weight: 0.3 kg

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