Configured for Specific Technical Task in CENTUM VP / CS 3000 Field Control Stations, the YOKOGAWA AAI141-H00/K4A00 (AAI141 Analog Input Module) provides direct physical/electrical execution.
| Code | Type | Description |
|---|---|---|
| AAI141 | Base Model | Analog Input Module (4 to 20 mA, 16-channel, Non-Isolated) |
| -H | Suffix Code | With digital communication (HART protocol) |
| 0 | Suffix Code | Always 0 |
| 0 | Suffix Code | Basic type |
| /K4A00 | Option Code | With KS Cable Interface Adapter [Model: ATK4A-00] |
| Parameter | Specification |
|---|---|
| Model | AAI141-H00/K4A00 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 3.0 kg (Shipping Weight) / 0.8 kg (Net Weight) |
| Dimensions | 260 x 180 x 60 mm |
| Operating Temp | -10 deg C to +60 deg C |
| Power Consumption | 24 VDC nominal |
| Input Range | 4-20 mA DC (0-25 mA permissible) with HART digital overlay |
| Channels | 16 |
| Resolution | 16-bit A/D conversion |
| Accuracy | +/-0.1% of full scale |
| Input Impedance | 250 Ohm (current input) |
| Isolation | Galvanic isolation per channel |
| Diagnostics | Open-circuit, short-circuit, and HART communication error detection |
| Mounting | Rack-mounted |
To establish digital interaction with smart field devices, the module utilizes the 4-20 mA HART loop protocol. It retrieves auxiliary process variables and calibration data by modulating high-frequency digital signals directly onto the analog loop without affecting the primary variable measurement. This digital overlay enables real-time instrument diagnostics and loop monitoring inside the CENTUM control network. Internal filter circuitry suppresses potential line noise to prevent attenuation of the frequency-shift keying (FSK) digital transmission.
Q: Does the module support online maintenance inside the Field Control Station rack?
A: Yes, the module supports hot-swapping under powered conditions. An operator can replace a faulty module without disrupting the power supply or communication buses of neighboring modules in the same rack.
Q: What is the purpose of the /K4A00 option code included with this hardware assembly?
A: The /K4A00 option configures the module with the ATK4A-00 KS Cable Interface Adapter. This adapter allows direct plug-and-play terminal connections to field wiring termination blocks using standard system cables.
Q: How does the module indicate channel fault conditions to the host system?
A: The module runs continuous background diagnostics. If loop current drops below 3.6 mA, itflags an open-circuit fault, marks the specific channel data status as invalid, and issues an alarm to the operator station.
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