Product Description

The AAI143-S00 (Model: AAI143) is a high-density, 16-channel isolated analog input module designed for Yokogawa’s flagship control platforms, including CENTUM VP, CENTUM CS 3000, and the ProSafe-RS safety instrumented system. This module functions as a standard type acquisition unit for 4 to 20 mA DC signals, providing a critical interface between field instrumentation and the Distributed Control System (DCS). Engineered for high-availability environments, the AAI143-S00 ensures that process variables such as flow, pressure, and temperature are captured with extreme precision and diagnostic integrity.

A defining technical characteristic of the AAI143-S00 is its robust galvanic isolation, featuring a withstanding voltage of 1500 V AC between the input channels and the system backplane. This isolation prevents ground loops and protects sensitive controller electronics from field-side electrical interference. The module supports a rapid data update period of 10 ms, enabling real-time responsiveness for critical control loops. Additionally, it is versatile enough to support both 2-wire and 4-wire transmitter configurations through channel-specific settings, making it a universal choice for diverse plant instrument architectures.

Detailed Technical Specifications

• Manufacturer: Yokogawa Electric Corporation

• Model Number: AAI143

• Order Number: AAI143-S00

• Compatible Systems: CENTUM VP, CENTUM CS 3000, ProSafe-RS

• Input Channels: 16 Channels, Fully Isolated

• Input Signal Range: 4 to 20 mA DC

• Data Update Period: 10 ms

• Measurement Accuracy: ±16 µA (±0.1% of full scale)

• Transmitter Power Supply: 19.0 V or higher (at 20 mA)

• Input Resistance: Power ON: 270–350 Ω; Power OFF: ≥ 500 kΩ

• Withstanding Voltage: 1500 V AC for 1 minute (Input to System)

• Allowable Input Current: 24 mA

• Current Consumption: 230 mA (5 V DC), 540 mA (24 V DC)

• Temperature Drift: ±16 µA / 10 °C

• Weight: 0.3 kg (Net)

• Standard Compatibility: Suitable for standard and safety-related applications