Yokogawa AAI143-S50/A4800 Analog Input Module

Overview

The Yokogawa AAI143-S50/A4800 is a 16-channel analog input module designed for CENTUM VP and CS 3000 Distributed Control Systems (DCS). It converts 4–20 mA current signals from field devices into digital data. Engineers use it for monitoring pressure, temperature, and flow with high accuracy and fast response. Each channel is isolated, ensuring safe and reliable operation in demanding industrial environments. The module supports dual-redundant configurations and optional HART communication.

Technical Specifications

General

• Model: AAI143-S50/A4800

• Type: Analog Input Module

• Application: CENTUM VP / CS 3000 DCS

Input

• Number of Channels: 16 (isolated)

• Input Signal: 4–20 mA DC (2-wire / 4-wire)

• Allowable Input Current: Up to 24 mA

• Input Resistance:

• Power ON: 270 Ω (20 mA) to 350 Ω (4 mA)

• Power OFF: ≥ 500 kΩ

Accuracy & Performance

• Accuracy: ±16 µA (±0.08% FS)

• A/D Conversion: 16-bit resolution

• Data Update Rate: 10 ms per channel

• Temperature Drift: ±16 µA per 10 °C

Power Supply

• Transmitter Power Supply:

• Voltage at 20 mA: ≥ 19.0 V

• Voltage at 0 mA: ≤ 25.5 V

• Max Output Current: 25 mA/channel

• Module Power Supply:

• 5 V DC: 230 mA (max)

• 24 V DC: 540 mA (max)

Isolation & Protection

• Isolation Voltage: 1500 V AC (channel-to-channel and input-to-system)

• Explosion Protection: Not included (standard type)

Environmental Conditions

• Operating Temperature: –10°C to +60°C

Physical

• Dimensions (L × W × H): 107.5 mm × 32.8 mm × 130 mm

• Weight:  0.3 kg