Overview of the Yokogawa AAI835-H Analog I/O Module
The AAI835-H operates as an analog I/O module within Yokogawa’s distributed control systems. This unit handles both analog input acquisition and analog output control for process loops. Engineers deploy it in process plants that demand accurate, bidirectional signal handling.
Key Technical Specifications of the AAI835-H
The AAI835-H combines a rugged housing with a secure field wiring interface. Below you will find the core parameters that define this module’s performance envelope.
| Parameter | Specification |
|---|---|
| Product Type | Analog I/O Module |
| Input Channels | 8 analog inputs |
| Output Channels | 8 analog outputs |
| Input Signal Range | 1–5 V DC / 4–20 mA |
| Output Signal Range | 4–20 mA |
| Resolution | 16-bit A/D and D/A conversion |
| Accuracy | ±0.1% of full scale |
| Isolation | Channel-to-channel isolation |
| Number of Terminals | 20 screw terminals |
| Power Supply | 24 V DC nominal |
| Power Consumption | Approximately 5 W |
| Dimensions | 130 mm × 100 mm × 25 mm |
| Weight | Approximately 280 g |
| Interface | Screw terminals and backplane bus |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -20°C to 70°C |
| Humidity | 5% to 95% RH, non-condensing |
Physical Design and Interface Details
The AAI835-H adopts a compact footprint that fits standard Yokogawa I/O racks. Its dimensions measure 130 mm in length, 100 mm in width, and 25 mm in depth. Moreover, the module weighs roughly 280 grams, which simplifies rack installation and field replacement. Twenty screw terminals secure field wiring without specialized tooling.
Performance and Signal Processing Capabilities
This module provides eight analog inputs alongside eight analog outputs for flexible control. The 16-bit conversion delivers high-resolution data acquisition and precise output regulation. Additionally, channel-to-channel isolation prevents signal interference between adjacent paths. Consequently, the unit suits demanding process loops requiring tight measurement tolerances.
Power and Environmental Considerations
The AAI835-H operates on a 24 V DC nominal power supply. Power consumption remains approximately 5 W during normal operation. The operating temperature range spans 0°C to 55°C for industrial environments. Storage temperature extends from -20°C to 70°C. Furthermore, humidity tolerance reaches 95% RH without condensation.
Details
| Weight | 0.35 kg |
|---|---|
| Dimensions | 120 × 52 × 125 mm |
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