AAI141-H50/K4A00 Yokogawa 4-20mA Input Module with HART
Introduction:
16-channel non-isolated analog input module with HART protocol. 4-20mA signal range. KS Cable Interface Adapter included.
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Product Overview
Module Design and Application
The Yokogawa AAI141-H50/K4A00 is an analog input module from the AAI141 series. This module provides 16 non-isolated channels for 4 to 20 mA signals. The HART protocol option enables digital communication with smart field devices. Consequently, the AAI141-H50/K4A00 suits distributed control systems requiring both analog and digital data. The module includes a KS Cable Interface Adapter for connecting to terminal boards.
Model Breakdown Explanation
The model number AAI141-H50/K4A00 reveals specific configuration details. The "H" indicates digital communication capability with HART protocol support. "5" means no explosion protection is included. "0" specifies the basic type without extended temperature options. Finally, "K4A00" includes the KS Cable Interface Adapter. Therefore, this configuration suits standard industrial environments without corrosive gas concerns.
Key Features and Benefits
All 16 channels accept 4 to 20 mA signals from field transmitters. The module supports both 2-wire and 4-wire transmitters with per-channel configuration. Consequently, the AAI141-H50/K4A00 offers exceptional flexibility for various field devices. The data update period is only 10 ms for fast process response. Step response time reaches 100 ms for stable signal acquisition.
Technical Specifications
General Specifications
Manufacturer: Yokogawa
Product Number: AAI141-H50/K4A00
Product Type: AAI141 Analog I/O Module
Number of Input Channels: 16, non-isolated
Input Signal: 4 to 20 mA DC
Allowable Input Current: 27 mA maximum
Weight: 0.2 kg
Model Option Breakdown
| Suffix Code | Option | Description |
|---|---|---|
| H | HART Protocol | With digital communication (HART protocol) |
| 5 | Explosion Protection | No explosion protection |
| 0 | Basic Type | Standard configuration |
| K4A00 | Interface Adapter | With KS Cable Interface Adapter |
Input Resistance Specifications
The Yokogawa AAI141-H50/K4A00 exhibits different input resistance depending on power state.
| Condition | Input Resistance |
|---|---|
| Power ON | 400 Ω (at 20 mA) to 1000 Ω (at 4 mA) |
| Power OFF | 500 kΩ or larger |
Accuracy and Drift
Accuracy: ±16 μA
Drift due to ambient temperature change: ±16 μA per 10°C
Data Update and Response Times
Data Update Period: 10 ms
Step Response Time: 100 ms
Transmitter Power Supply
The AAI141-H50/K4A00 provides power for 2-wire transmitters.
| Parameter | Value |
|---|---|
| Minimum Voltage (at 20 mA) | 14.8 V or higher |
| Maximum Voltage (at 0 mA) | 26.4 V or less |
| Output Current Limit | 27 mA |
Transmitter Configuration
2-wire or 4-wire transmitter setting: Per channel using setting pins
Current Consumption
5 V DC: 310 mA maximum
24 V DC: 450 mA maximum
External Communication Interfaces
Pressure clamp terminal
KS cable
MIL connector cable
Communication Protocol
HART Communication: Available
Installation Guide
Follow these steps to install the Yokogawa AAI141-H50/K4A00 correctly.
Power Down System: First, disconnect power from the DCS backplane completely.
Mount Module: Next, insert the AAI141-H50/K4A00 into the designated slot.
Connect KS Adapter: Then, attach the KS Cable Interface Adapter (K4A00) to the module.
Wire Field Devices: After that, connect 2-wire or 4-wire transmitters to the input channels.
Set Transmitter Type: Meanwhile, configure each channel using the setting pins.
Restore Power: Finally, reapply power and verify the module status indicators.
The AAI141-H50/K4A00 requires proper configuration of the setting pins for each channel. Therefore, verify transmitter type before finalizing wiring. In addition, ensure the KS cable is securely connected to the terminal board. Consequently, proper installation ensures accurate analog signal acquisition.
Package List
The package includes the following physical items.
Yokogawa AAI141-H50/K4A00 analog input module (1 piece)
KS Cable Interface Adapter (K4A00) (1 piece)
Setting pins for 2-wire/4-wire configuration (installed)
Product label with part number and options
Note: Field wiring and terminal boards are not included. The KS cable is sold separately. No calibration certificate is provided with this module.
Frequently Asked Questions (FAQ)
1. How many channels does the AAI141-H50/K4A00 provide?
The Yokogawa AAI141-H50/K4A00 provides 16 non-isolated analog input channels. Therefore, it suits medium to large control system applications. Each channel accepts a 4 to 20 mA signal. Consequently, you can monitor up to 16 field devices with a single module.
2. Does this module support HART communication?
Yes, the Yokogawa AAI141-H50/K4A00 includes HART protocol support. The "H" in the suffix code confirms this feature. Therefore, digital communication with smart field devices is fully enabled. Consequently, you can access device diagnostics and configuration data through the same wiring.
3. What is the difference between isolated and non-isolated versions?
The Yokogawa AAI141-H50/K4A00 is a non-isolated module (AAI141). The isolated version is the AAI143 model. Therefore, the non-isolated version has lower cost but shares a common reference. For applications requiring channel-to-channel isolation, select the AAI143 series instead. Consequently, choose based on your grounding and noise immunity requirements.
4. What is the step response time of the AAI141-H50/K4A00?
The Yokogawa AAI141-H50/K4A00 has a step response time of 100 ms. Therefore, the module reaches stable readings within 100 ms after an input change. The data update period is 10 ms for continuous monitoring. Consequently, the module suits applications requiring moderate response speed.
5. What is the accuracy of the AAI141-H50/K4A00?
The Yokogawa AAI141-H50/K4A00 delivers ±16 μA accuracy. This high precision ensures reliable process measurement. Temperature drift adds only ±16 μA per 10°C. Therefore, accuracy remains excellent even in varying ambient conditions.
6. What is the KS Cable Interface Adapter used for?
The KS Cable Interface Adapter (K4A00) connects the AAI141-H50/K4A00 to a terminal board. Therefore, field wiring terminates on the terminal board rather than directly on the module. This design simplifies maintenance and replacement. Consequently, you can change modules without disturbing field wiring.
7. What is the input resistance when power is off?
When power is off, the Yokogawa AAI141-H50/K4A00 presents an input resistance of 500 kΩ or larger. Therefore, the module does not load the transmitter circuit during power loss. This feature prevents battery drain in loop-powered applications. Consequently, the module is safe for use with external power sources.
Related Accessories
Enhance your Yokogawa DCS system with these compatible parts.
Terminal Board: Yokogawa AEA4D or compatible for field wiring termination
KS Cable: Yokogawa KS1 dedicated cable for module-to-terminal board connection
MIL Connector Cable: Yokogawa MIL cable for alternative wiring method
Pressure Clamp Terminal: Yokogawa accessory for secure field wire termination
Mounting Base: Yokogawa AAI141 compatible backplane for module installation
Always use genuine Yokogawa components with the AAI141-H50/K4A00. Therefore, third-party cables may cause communication errors or signal degradation. In addition, verify transmitter compatibility before ordering. Consequently, using authentic parts ensures optimal module performance and system reliability.