Product Description
Product Overview
The Yokogawa NFAI841-S50 Analog I/O Module is a non-isolated module designed for Yokogawa’s industrial control systems, providing eight 4-20 mA analog input channels and eight 4-20 mA analog output channels to support up to eight control loops. Part of the Current/Voltage I/O Modules family, this standard-type module features a fast 10 ms data refresh cycle, overcurrent protection for inputs, and configurable transmitter power supply settings via pins. With a compact weight of 0.3 kg and options for pressure clamp terminals or MIL connector cables, it is engineered for reliable performance in process automation applications.
Technical Information
| Parameter | Specifications |
|---|---|
| Manufacturer | Yokogawa |
| Model/Part Number | NFAI841-S50 |
| Description | Analog I/O Module |
| Model | NFAI841 |
| Number of I/O Channels | 8-channel input / 8-channel output, non-isolated |
| I/O Signal | Input: 4 to 20 mA Output: 4 to 20 mA |
| Allowable Input Current | 25 mA |
| Overcurrent Protection | Provided |
| Input Resistance | Power ON: 250 Ω Power OFF: 500 kΩ or more |
| Allowable Load Resistance | 0 to 750 Ω |
| Circuit-Open Detection | 0.65 mA or less |
| Accuracy | ±0.1% of full scale |
| Data Refresh Cycle | 10 ms |
| Input Step Response Time | 100 ms |
| Output Step Response Time | 40 ms |
| Output Fallback | Set for each channel |
| Transmitter Power Supply | 22.8 to 26.4 V (output current limit: 27 mA) |
| Setting of 2-Wire or 4-Wire Transmitter | For each channel by setting pin |
| Temperature Drift | Max. ±0.01 %/°C |
| Maximum Current Consumption | 310 mA (5 V DC) 500 mA (24 V DC) |
| Weight | 0.3 kg (0.66 lb) |
| External Connection | Pressure clamp terminal, MIL connector cable |
| HART Communication | Not available (for -S50 configuration) |
Specific Configuration
- Model/Part Number: NFAI841-S50
- Configuration Details:
- Suffix Codes: -S (Standard type), 5 (With no explosion protection), 0 (Basic type)
- No option codes specified (e.g., /A4S00 for pressure clamp terminal block not confirmed in prompt)