Overview
The Yokogawa NFAI841-S00/A4S00 Analog Input Module is a high-performance signal processing unit designed for precise analog data acquisition in industrial automation systems. It ensures stable and accurate input signal conversion, supporting a wide range of analog sensors and transmitters. Moreover, its robust design and reliable circuit architecture make it suitable for mission-critical process control environments, where accuracy and uptime are essential. Therefore, it serves as a trusted choice for engineers integrating advanced process control and monitoring solutions within distributed control systems (DCS).
Technical Specifications
| Parameter |
Specification |
| Model |
NFAI841-S00/A4S00 |
| Product Type |
Analog Input Module |
| Brand |
Yokogawa |
| Input Channels |
8 isolated analog input channels |
| Input Signal Types |
4–20 mA DC, 1–5 V DC, 0–10 V DC |
| Resolution |
16-bit A/D conversion |
| Sampling Rate |
250 ms per channel (typical) |
| Accuracy |
±0.1% of full scale |
| Isolation |
Channel-to-channel and channel-to-bus isolation |
| Power Supply |
24 V DC nominal |
| Operating Temperature |
0°C to +55°C |
| Storage Temperature |
–20°C to +70°C |
| Relative Humidity |
5% to 95% (non-condensing) |
| Communication Interface |
Yokogawa I/O bus |
| Mounting |
Plug-in module for NFA rack |
| Dimensions |
Approx. 120 mm × 35 mm × 90 mm |
| Weight |
Approx. 0.3 kg |
FAQ
Q1: What type of input signals does the NFAI841-S00/A4S00 support?
It supports analog current and voltage signals, including 4–20 mA and 1–5 V DC input ranges.
Q2: Can this module be used in hazardous area environments?
Yes, when used with appropriate isolators or Yokogawa’s certified DCS enclosures.
Q3: How does the module ensure data accuracy?
It uses a 16-bit A/D converter and built-in diagnostics to reduce drift and noise interference.
Q4: Is it compatible with legacy Yokogawa systems?
Yes, it can be integrated with both modern and legacy Yokogawa DCS systems using standard I/O interfaces.
Q5: What is the maintenance requirement for this module?
Minimal maintenance is required thanks to its stable components and self-diagnostic features.
