Yokogawa AAI143-S00 Analog Input Module Overview

The Yokogawa AAI143-S00 is an analog input module with 16 isolated input channels. This module accepts 4 to 20 mA input signals from field transmitters. The "S" designation indicates the standard type version. The two "0" suffixes specify the basic configuration without special options. Each channel is fully isolated for noise immunity and safety. Therefore, the AAI143-S00 is ideal for Yokogawa DCS systems. The module supports both 2-wire and 4-wire transmitters with per-channel configuration.

Input Specifications

The Yokogawa AAI143-S00 offers comprehensive input capabilities for field signals. Number of input channels is 16, fully isolated from each other and from the system. Input signal range is standard 4 to 20 mA for industrial transmitters. Allowable input current reaches 24 mA maximum without damage. Input resistance varies based on power status. When power is ON, resistance ranges from 270 Ω at 20 mA to 350 Ω at 4 mA. When power is OFF, resistance becomes 500 kΩ or larger to minimize loop loading.

Withstanding voltage rating is 1500 V AC for 1 minute between input and system. Consequently, the AAI143-S00 provides excellent protection against surges and faults. Accuracy is ±16 µA for precise measurement of 4-20 mA signals. Data update period is 10 ms for responsive control applications.

Transmitter Power Supply

The Yokogawa AAI143-S00 includes a built-in transmitter power supply. Output voltage reaches 19.0 V or higher at 20 mA to power 2-wire transmitters. Maximum voltage is 25.5 V or less at 0 mA under no-load conditions. Output current limit is set to 25 mA for protection. Each channel can be individually configured for 2-wire or 4-wire transmitters using setting pins. This flexibility eliminates the need for external power supplies on 2-wire loops. As a result, the AAI143-S00 simplifies field wiring and reduces panel space.

Environmental & Drift Specifications

The Yokogawa AAI143-S00 maintains accuracy across temperature variations. Drift due to ambient temperature change is ±16 µA per 10°C. Therefore, the module performs reliably in control rooms with temperature fluctuations. Maximum current consumption is 230 mA at 5 V DC for logic circuits. Additionally, it consumes 540 mA at 24 V DC for the loop power supply. Total weight of the module is only 0.3 kg for easy handling.

External Communication & Wiring

The Yokogawa AAI143-S00 supports multiple external connection methods. Pressure clamp terminals provide secure wire retention without special tools. Alternatively, a MIL connector cable is available for high-density connections. A dedicated KS1 cable can also be used for specific system configurations. Consequently, the AAI143-S00 adapts to various installation preferences.

Key Features & Benefits

• 16 isolated channels – The AAI143-S00 accepts multiple 4-20 mA signals in one module.

• Built-in transmitter power – Provides 19V at 20mA for 2-wire transmitters per channel.

• Per-channel configuration – Set each channel for 2-wire or 4-wire operation independently.

• Fast update rate – 10 ms data update period for responsive control.

• High accuracy – ±16 µA ensures precise measurement of process variables.

• Multiple wiring options – Pressure clamp, MIL connector, or KS1 cable connections.

Installation Guidelines

Follow these steps to install the Yokogawa AAI143-S00 correctly. First, power down the Yokogawa DCS system completely. Second, select an available slot in the I/O rack for the module. Third, align the AAI143-S00 with the card guides in the chassis. Fourth, push the module firmly into the backplane connector until seated. Fifth, secure the module with the retaining screws at top and bottom. Finally, configure each channel's 2-wire or 4-wire setting pin before wiring.

Connect field devices according to their transmitter type. Use twisted pair shielded cable for all 4-20 mA signals. Do not exceed the 24 mA allowable input current. The AAI143-S00 requires both 5V DC and 24V DC power from the backplane.

Package Contents

Your shipment includes the following items:

• 1 x Yokogawa AAI143-S00 analog input module

• 1 x Installation manual with wiring diagrams

• 1 x Setting pin tool for 2-wire/4-wire configuration

• 1 x Terminal label sheet for channel identification

No field wiring cables are included with the AAI143-S00. Therefore, you must order pressure clamp terminals, MIL cables, or KS1 cables separately based on your preference.

Frequently Asked Questions (FAQ)

1. What is the difference between 2-wire and 4-wire transmitter settings?
For 2-wire transmitters, the AAI143-S00 supplies loop power. For 4-wire transmitters, the module only monitors the signal without supplying power.

2. Can I mix 2-wire and 4-wire transmitters on the same module?
Yes. The Yokogawa AAI143-S00 allows per-channel configuration. Therefore, each of the 16 channels can be set independently for 2-wire or 4-wire operation.

3. What happens if input current exceeds 20 mA?
The AAI143-S00 accepts input current up to 24 mA without damage. However, measurement accuracy may be reduced above the calibrated 20 mA range.

4. Is this module compatible with Foundation Fieldbus?
No. The AAI143-S00 is a 4-20 mA analog input module only. For Foundation Fieldbus, use Yokogawa's FIO series modules.

5. What is the withstand voltage rating?
The Yokogawa AAI143-S00 withstands 1500 V AC for 1 minute between input channels and the system. This ensures safety and surge protection.

Why Choose the Yokogawa AAI143-S00?

This 16-channel analog input module delivers reliable 4-20 mA signal acquisition for DCS systems. For starters, the Yokogawa AAI143-S00 provides full isolation on all 16 channels. Each channel can be independently configured for 2-wire or 4-wire transmitters using setting pins. The built-in transmitter power supply delivers 19V at 20 mA, eliminating external power supplies. Furthermore, the 10 ms data update period ensures responsive process control. Accuracy of ±16 µA guarantees precise measurement of critical variables. Drift of only ±16 µA per 10°C maintains performance across temperature changes. The AAI143-S00 withstands 1500 V AC isolation for safety and noise immunity. Multiple connection options include pressure clamp terminals, MIL cables, or KS1 cables. Most importantly, this module integrates seamlessly into Yokogawa CENTUM and ProSafe DCS systems.

Order the Yokogawa AAI143-S00 today for your analog input needs. This module is perfect for pressure, temperature, flow, and level monitoring in refineries, chemical plants, power generation, and other process industries.