Overview
The Yokogawa AAT141-S00, also cataloged as the AAI141 Analog Input Module, performs isolated 4-20 mA field signal conversion for ESB bus node units, Optical ESB bus node units, and FIO field control units. The module converts analog input signals into internal process data for Field Control Stations (FCS).
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAT141-S00 |
| Brand | Yokogawa |
| Product Type | Analog Input Module |
| Signal Type | 4-20 mA Analog Input |
| Number of Channels | 16 channels |
| Channel Isolation | Isolated input channels |
| HART Communication | Supported with integrated HART modem |
| Maximum HART Devices | 16 devices per module |
| Maximum HART Variables | 32 points per module |
| HART Multidrop Connection | Maximum 5 devices per channel |
| HART Variable Refresh Cycle | 1 second per device; 17 seconds per ESB bus connection with 16 devices |
| Compatible Systems | ANB10S, ANB10D, ANB11S, ANB11D, AFV30S, AFV30D, AFV40S, AFV40D, AFV10S, AFV10D |
| Weight | 0.2 kg |
| Dimensions | 3.4 x 10.8 x 13 cm |
4-20 mA HART Process Signal Handling
The Yokogawa AAT141-S00 integrates analog signal conversion and HART communication functions within the I/O module architecture. Therefore, field devices with HART capability can connect directly to module channels through the HART modem interface.
The module processes up to 16 HART devices and handles up to 32 HART variables as internal process input data through the %Z terminal connection. In addition, HART multidrop configurations support up to 5 devices on each channel, while maintaining cyclic data refresh through the ESB bus connection.
The AAT141-S00 also provides channel-to-channel isolation for analog signal processing, reducing electrical interference between field input circuits. This isolation design supports Yokogawa DCS environments where separated analog measurement loops require controlled signal conversion.
Frequently Asked Questions
Q: What type of field signals does the AAT141-S00 accept?
A: The AAT141-S00 accepts 4-20 mA analog input signals and converts them into internal FCS process data.
Q: Does the AAT141-S00 support direct HART device connection?
A: Yes. The module includes HART modem functionality and allows direct connection of HART field devices. It supports up to 16 HART devices per module.
Q: Which Yokogawa system platforms support this module?
A: The AAT141-S00 is designed for ESB bus node units, Optical ESB bus node units, and FIO field control units including ANB series and AFV series platforms.
Field Installation Guidelines
- Install the AAT141-S00 in the specified Yokogawa node unit or FIO field control unit according to the system hardware manual.
- Verify terminal wiring before applying field power to prevent incorrect analog loop connections.
- Use shielded instrumentation cables for 4-20 mA signal wiring where required by site electrical practices.
- Connect cable shields according to the plant grounding design to reduce electromagnetic interference.
- Separate analog signal cables from high-voltage power cables and switching circuits during cabinet installation.
- Confirm HART device addressing and communication settings before commissioning multidrop configurations.
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