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Product Description
The Yokogawa AAI143-S50/K4A00 is a 16-channel isolated analog input module designed for precise current input signal acquisition (4–20 mA). It is compatible with Yokogawa’s field control systems and supports HART communication for smart instrumentation. With built-in channel isolation, it ensures noise immunity and reliable signal integrity in industrial environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | AAI143-S50/K4A00 |
| Number of Channels | 16 isolated channels |
| Input Signal | 4 to 20 mA DC |
| Input Resistance (Power ON) | 270 Ω (at 20 mA) to 350 Ω (at 4 mA) |
| Input Resistance (Power OFF) | 500 kΩ or higher |
| Allowable Input Current | 24 mA |
| Accuracy | ±16 µA |
| Drift (Ambient Temp. Change) | ±16 µA / 10 °C |
| Data Update Period | 10 ms |
| Withstanding Voltage | 1500 V AC (input to system, 1 min) |
| Transmitter Power Supply | 19.0 V or higher (at 20 mA), max 25.5 V, 25 mA |
| HART Communication | Supported |
| Power Consumption | 230 mA (5 V DC), 540 mA (24 V DC) |
| External Connection | KS cable, MIL connector, pressure clamp terminals |
| Dimensions (W×D×H) | 107.5 × 32.8 × 130 mm |
| Weight | 0.3 kg |
Applications
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Industrial process control systems
-
Distributed control systems (DCS)
-
SCADA systems
-
Smart instrumentation integration
-
Oil & gas, chemical, power plants
Advantages
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High precision current signal processing
-
Full channel isolation enhances signal integrity
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Fast data acquisition with 10 ms update rate
-
HART compatibility for smart device diagnostics
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Compact size suitable for dense installations
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Supports both 2-wire and 4-wire transmitter setups
FAQ – Frequently Asked Questions
1. What is the input signal range supported by AAI143-S50/K4A00?
The module accepts 4 to 20 mA DC current input signals.
2. Is the AAI143 module electrically isolated?
Yes, all 16 input channels are individually isolated from each other and from the system.
3. Does it support HART communication?
Yes, the AAI143-S50/K4A00 supports HART protocol for enhanced device communication.
4. What is the resolution and update time?
It offers high-resolution readings with a data update period of 10 ms.
5. What types of external devices can it connect to?
It can connect to 2-wire or 4-wire transmitters and is compatible with KS cable, MIL connectors, or pressure clamp terminals.
6. Can the module be used in redundant systems?
Yes, it supports dual-redundant configurations for high availability.
7. What is the power supply requirement for the transmitters?
It provides 19.0 V or more at 20 mA with a maximum current limit of 25 mA.
8. What’s the typical use case of this module?
Used in critical industries like oil & gas, petrochemical, and manufacturing to capture analog current signals.
9. Is this module suitable for hazardous environments?
Yes, with explosion protection options available as per suffix codes.
10. How does the unit handle signal noise or ground loops?
Isolation between channels and system effectively eliminates ground loops and external interference.
Related Yokogawa Models (Same Series)
| Model | Input/Output Type | Channels | Isolation | Dimensions (mm) | Weight |
|---|---|---|---|---|---|
| AAI141 | Analog Input (4–20 mA) | 16 | No | 107.5 × 32.8 × 130 | 0.2 kg |
| AAV144 | Analog Input (-10 to +10 V) | 16 | Yes | 107.5 × 32.8 × 130 | 0.2 kg |
| AAI543 | Analog Output (4–20 mA) | 16 | Yes | 107.5 × 32.8 × 130 | 0.4 kg |
| AAI135 | Analog Input (4–20 mA, isolated ch.) | 8 | Yes | 107.5 × 32.8 × 130 | 0.3 kg |
| AAI841 | Analog I/O (8 In / 8 Out, 4–20 mA) | 16 | No | 107.5 × 32.8 × 130 | 0.3 kg |
| AAB141 | Analog Input (1–5 V / 4–20 mA) | 16 | No | 107.5 × 32.8 × 130 | 0.3 kg |
Popular Yokogawa Models
| Model | Function | Channels | Communication | Dimensions (mm) | Weight |
|---|---|---|---|---|---|
| AAI143 | Analog Input (4–20 mA, Isolated) | 16 | HART | 107.5 × 32.8 × 130 | 0.3 kg |
| AAI543 | Analog Output (4–20 mA, Isolated) | 16 | HART | 107.5 × 32.8 × 130 | 0.4 kg |
| AAV144 | Analog Input (-10 to +10 V, Isolated) | 16 | No | 107.5 × 32.8 × 130 | 0.2 kg |
| AAI135 | Analog Input (Isolated Channels) | 8 | HART | 107.5 × 32.8 × 130 | 0.3 kg |
| AAT141 | TC/mV Input Module | 16 | No | 107.5 × 32.8 × 130 | 0.2 kg |
| AAI835 | Analog I/O (4 In / 4 Out, Isolated) | 8 | HART | 107.5 × 32.8 × 130 | 0.3 kg |
