Overview
The Yokogawa AAT145-S00, also cataloged as the AAI141 Analog Input Module, performs isolated 4-20 mA signal conversion for Yokogawa FIO systems, ESB bus node units, and field control units. The module converts field analog input signals into internal process data for FCS execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAT145-S00 |
| Brand | Yokogawa |
| Product Type | Analog Input Module |
| Input Signal | 4-20 mA DC |
| Number of Channels | 16 channels |
| Channel Isolation | Isolated input channels |
| HART Communication | Supported with HART function option |
| HART Devices | Maximum 16 devices per module |
| HART Variables | Maximum 32 points per module |
| HART Multidrop Connection | Maximum 5 devices per channel |
| HART Variable Refresh Cycle | 1 second/device; maximum 17 seconds per ESB bus connection with 16 devices |
| Compatible Systems | ESB bus node units ANB10S, ANB10D; Optical ESB bus node units ANB11S, ANB11D; FIO field control units AFV30S, AFV30D, AFV40S, AFV40D, AFV10S, AFV10D |
| Estimated Shipping Size | 2.5 cm x 12.7 cm x 12.7 cm |
| Weight | 0.3 kg |
| Dimensions | 2.5 cm x 12.7 cm x 12.7 cm |
4-20 mA HART Loop Communication and Channel Isolation
The AAT145-S00 integrates analog signal conversion with isolated 4-20 mA input processing. Therefore, each field analog signal is converted into internal FCS data through the module interface.
When equipped with HART communication capability, the module directly connects HART field devices through integrated HART modems. Additionally, HART variables can be processed as standard process input data through %Z terminal connections.
The module supports up to 16 HART devices per unit and handles up to 32 HART variables. Furthermore, HART multidrop configurations allow up to 5 devices on each input channel.
Frequently Asked Questions
Q: What type of input signals does the Yokogawa AAT145-S00 process?
A: The AAT145-S00 processes isolated 4-20 mA analog input signals and converts field signals into internal FCS data.
Q: Does the AAT145-S00 support direct HART device communication?
A: Yes. The HART-enabled version includes HART modem functions and supports direct connection of HART field devices.
Q: Which Yokogawa platforms support the AAT145-S00 module?
A: The module supports ESB bus node units, Optical ESB bus node units, and FIO field control units including ANB and AFV series configurations.
Field Installation Guidelines
- Install the AAT145-S00 inside the specified Yokogawa node unit or FIO field control unit according to system hardware documentation.
- Verify terminal wiring before applying field power to prevent incorrect analog loop connections.
- Use shielded signal cables for 4-20 mA field wiring where required by the installation environment.
- Connect cable shields according to the plant grounding practice to reduce electromagnetic interference.
- Separate analog signal wiring from high-voltage power cables and switching circuits.
- Confirm HART communication wiring and device addressing before commissioning multidrop configurations.
- Verify module status indicators and FCS communication status after installation.
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