The Yokogawa AAI835-S03 converts field analog signals into digital data. This module accepts 4–20 mA inputs from transmitters and sensors. It fits directly into Yokogawa Centum VP and ProSafe-RS systems. You will use this unit for continuous process monitoring and control.
Technical Specifications Overview
This analog input module offers sixteen isolated input channels on a single board. Each channel provides a dedicated 24 V DC loop power supply. The Yokogawa AAI835-S03 features a high 16-bit resolution for precise measurements. A built-in digital filter removes high-frequency noise from input signals. Consequently, you gain stable readings even in electrically noisy environments.
| Parameter | Specification |
|---|---|
| Model | AAI835-S03 |
| Input Channels | 16 (isolated) |
| Signal Range | 4–20 mA |
| Resolution | 16 bits |
| Accuracy | ±0.05% of span |
| Temperature Drift | ±0.01%/°C |
| Update Rate | 20 ms per channel |
| Isolation Voltage | 1500 V AC (channel to system) |
| Dimensions (H x W x D) | 130 x 35 x 120 mm |
| Weight | 0.28 kg |
| Power Consumption | 4.5 W typical |
| Loop Power Output | 24 V DC, 20 mA per channel |
| Operating Temperature | -10°C to +65°C |
Internal Design and Energy Storage
The Yokogawa AAI835-S03 contains one main PCBA with 94 discrete components. Key parts include sixteen analog-to-digital converters for independent signal processing. The module also holds two electrolytic capacitors storing 470 µF of energy. This energy reserve maintains operation during 8 ms power interruptions. Moreover, a dedicated microprocessor manages all channel scanning locally.
Physical Interfaces and Mounting
You will find one front-facing 36-pin connector on this module. This connector accepts a standard Yokogawa terminal block like A4N3L. Each wire connects to a pressure-clamp termination externally. A green LED indicates normal module communication with the field control unit. A red LED will flash for any channel over-range condition. Four locking screws secure the Yokogawa AAI835-S03 firmly in its slot.
Installation and Operational Reliability
Install this analog input module in a ventilated cabinet away from heat sources. Maintain 30 mm of clearance above for proper airflow. The module performs an automatic calibration sequence every startup. Therefore, you receive accurate readings without manual adjustment. This unit supports hot-swapping for minimal production downtime.
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
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