Overview
Configured for 4-20 mA DC signal acquisition in CENTUM VP and CENTUM CS3000 DCS platforms, the Yokogawa AAI141-S50/K4A00 (AAI141 Analog Input Module) provides direct electrical conversion of field transmitter current signals into process data.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAI141-S50/K4A00 |
| Brand | Yokogawa |
| Origin | Japan |
| Product Type | Analog Input Modules |
| Module Function | 16-channel non-isolated analog current input |
| Input Signal | 4-20 mA DC |
| Number of Input Channels | 16 channels |
| Isolation Type | Non-isolated input channels |
| Allowable Input Current | 27 mA maximum |
| Input Resistance | Approx. 400 ohm at 20 mA to 1000 ohm at 4 mA |
| Measurement Accuracy | +/- 16 micro A |
| Data Update Period | 10 ms |
| Step Response Time | 100 ms from 0% to 100% |
| Transmitter Power Supply | 14.8 VDC or higher at 20 mA |
| Redundancy Configuration | Supports dual-redundant configuration |
| External Interface | KS Cable Interface Adapter ATK4A-00 |
| Conformal Coating | ISA Standard G3 conformal coating |
| Weight | Approx. 0.2 kg |
| Dimensions | Not specified in provided data |
| Operating Temp | -20 deg C to +70 deg C |
| Power Consumption | 310 mA at 5 VDC, 450 mA at 24 VDC |
Yokogawa DCS Process Signal Interface
The AAI141-S50/K4A00 processes standard 4-20 mA DC transmitter signals for Yokogawa CENTUM VP and CENTUM CS3000 systems. The module accepts current inputs from 2-wire and 4-wire transmitters, then transfers measured values through the DCS I/O architecture.
In addition, the module supports Yokogawa process instrumentation functions including loop signal handling and channel configuration within the control system environment. For HART field devices, system configuration depends on the installed DCS hardware and communication components.
The module version uses ISA Standard G3 conformal coating, therefore it supports operation in environments where corrosive gases or contaminants may affect electronic assemblies.
Frequently Asked Questions
Q: Does the AAI141-S50/K4A00 provide channel isolation between analog inputs?
A: No. The AAI141-S50/K4A00 is a non-isolated analog input module. Field wiring and grounding practices must follow the system installation requirements.
Q: Can this module operate in a redundant configuration?
A: Yes. The module supports a dual-redundant configuration when installed according to Yokogawa CENTUM system architecture requirements.
Q: What type of field signals can the module receive?
A: The module receives 4-20 mA DC signals from 2-wire or 4-wire transmitters with a maximum allowable input current of 27 mA.
Field Installation Guidelines
- Install the module in the designated Yokogawa I/O node or control system cabinet location according to the hardware installation manual.
- Use shielded signal cables for analog transmitter wiring and connect cable shields according to site grounding standards.
- Separate analog signal cables from high-current power cables and switching circuits to reduce electrical interference.
- Verify transmitter loop polarity before applying power to the input channels.
- Confirm the KS Cable Interface Adapter connection before system commissioning.
- Check module configuration parameters in the CENTUM engineering environment before placing the channel into service.
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