Overview
Suffix Breakdown & Model Matrix
| Code | Specification |
|---|---|
| AAI143 | Analog Input Module, 4-20 mA, 16-channel, isolated |
| -H | Digital communication with HART protocol |
| 5 | No explosion protection |
| 0 | Basic type |
| /K4A00 | KS Cable Interface Adapter for connection to an AEA4D Terminal Board; associated adapter model ATK4A-00 |
The complete AAI143-H50/K4A00 configuration therefore combines the isolated 16-channel AAI143 hardware, HART communication, non-explosion-protected configuration, basic type, and the /K4A00 KS cable interface. (横河电机)
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAI143-H50/K4A00 |
| Base Model | AAI143 |
| Brand | Yokogawa |
| System | CENTUM VP |
| Product Type | Analog Input Module |
| Number of Input Channels | 16, isolated |
| Input Signal | 4-20 mA DC |
| Allowable Input Current | 24 mA |
| Withstanding Voltage | 1500 V AC between input and system for 1 minute |
| Input Resistance, Power ON | 270 ohm at 20 mA to 350 ohm at 4 mA |
| Input Resistance, Power OFF | 500 kohm or larger |
| Accuracy | +/-16 uA |
| Data Update Period | 10 ms |
| Step Response Time | 100 ms |
| Transmitter Power Supply | 19.0 V or higher at 20 mA; 25.5 V or less at 0 mA |
| Output Current Limit | 25 mA |
| Transmitter Configuration | 2-wire or 4-wire, selectable for each channel by setting pin |
| Ambient Temperature Drift | +/-16 uA/10 deg C |
| Maximum Current Consumption | 230 mA at 5 VDC; 540 mA at 24 VDC |
| HART Communication | Available |
| External Connection | Pressure clamp terminal, MIL connector cable, dedicated KS1 cable |
| Interface Option | /K4A00 KS Cable Interface Adapter |
| Terminal Board Compatibility | AEA4D Terminal Board |
| Adapter Model | ATK4A-00 |
| Weight | Approx. 0.3 kg |
| Dimensions | Not specified in the supplied product data |
| Operating Temp | Not specified for the basic -H50 configuration |
The AAI143 specification identifies 16 isolated 4-20 mA inputs, a 10 ms data update period, 100 ms step response time, and HART communication. (Spare Center)
HART Communication and Channel Isolation
The -H configuration adds digital communication using the HART protocol while the AAI143 hardware maintains isolated 4-20 mA input channels. This allows the module to acquire the analog process variable while supporting HART communication on compatible transmitter loops.
The /K4A00 option defines the physical interface arrangement rather than changing the input signal specification. It provides the KS Cable Interface Adapter for connection to an AEA4D Terminal Board.
Frequently Asked Questions
Q: How many analog input channels does the AAI143-H50/K4A00 provide?
A: It provides 16 isolated analog input channels for 4-20 mA DC signals.
Q: Does the AAI143-H50/K4A00 support HART communication?
A: Yes. The -H suffix specifies digital communication using the HART protocol.
Q: What does the /K4A00 option specify?
A: /K4A00 specifies the KS Cable Interface Adapter used to connect the module to an AEA4D Terminal Board. The associated adapter model is ATK4A-00.
- Verify the module model and complete suffix code before installation.
- Confirm that the field loop uses a 4-20 mA signal compatible with the AAI143 input specification.
- Set each channel for the applicable 2-wire or 4-wire transmitter configuration using the designated setting pin.
- Use the specified KS cable interface and compatible AEA4D Terminal Board when the /K4A00 configuration is installed.
- Keep analog signal wiring separated from high-voltage and high-current conductors to reduce electrical interference.
- Connect cable shields according to the plant grounding scheme and the applicable Yokogawa installation documentation.
- Verify loop polarity and transmitter supply conditions before applying power.
- Confirm HART communication requirements when connecting HART-capable transmitters.
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