Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NFAI543-H00 |
| Brand | Yokogawa |
| Origin | Japan |
| Module Type | Isolated Analog Output Module |
| Number of Output Channels | 16-channel output isolated |
| Output Signal | 4-20 mA current output |
| Withstanding Voltage | Between output and system: 1500 V AC for 1 minute |
| Allowable Load Resistance | 0 to 750 ohm |
| Circuit-open Detection | 0.65 mA or less |
| Accuracy | +/- 0.3% of full scale |
| Data Refresh Cycle | 10 ms |
| Output Step Response Time | 100 ms |
| Output Fallback | Configurable for each channel |
| Temperature Drift | Max. +/- 0.01%/deg C |
| Maximum Current Consumption | 230 mA at 5 VDC / 540 mA at 24 VDC |
| Weight | 0.4 kg |
| External Connection | Pressure clamp terminal, MIL connector cable |
| HART Communication | Available |
4-20 mA HART Loop and Channel Isolation Characteristics
The Yokogawa NFAI543-H00 integrates isolated analog output circuitry for process control signal transmission. The module generates 16 independent 4-20 mA current outputs and maintains electrical separation between output circuits and the system side.
Furthermore, the module supports HART communication capability, allowing digital communication over the standard analog current loop. The isolated output design reduces channel interference during multi-loop operation and supports stable signal handling in distributed control configurations.
The module provides a 10 ms data refresh cycle and a 100 ms output step response time. Therefore, it supports control applications requiring consistent analog signal update performance. The output fallback function can be configured individually for each channel to define channel behavior during abnormal operating conditions.
Frequently Asked Questions
Q: Does the NFAI543-H00 support isolated analog outputs between channels and the system side?
A: The module provides isolated 16-channel analog outputs and specifies 1500 V AC withstand voltage between output circuits and the system side for 1 minute.
Q: What type of field signals can the NFAI543-H00 generate?
A: The module generates 4-20 mA current output signals with an allowable load resistance range from 0 to 750 ohm.
Q: Does the module support HART communication?
A: Yes. The NFAI543-H00 supports HART communication over the analog current output loop.
Field Installation Guidelines
- Install the NFAI543-H00 according to the Yokogawa system hardware installation manual and applicable base unit configuration requirements.
- Connect field wiring through the specified pressure clamp terminal or MIL connector cable interface.
- Use shielded cables for analog current loops when the installation environment contains electrical noise sources.
- Connect cable shields according to the control system grounding design to reduce electromagnetic interference.
- Separate analog signal wiring from high-voltage power cables and switching circuits.
- Verify output loop polarity before applying field power to prevent incorrect current signal transmission.
- Confirm channel configuration, output fallback settings, and HART communication parameters before commissioning.
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