Overview
The Yokogawa NFAI135-S51 Analog Input Module handles 4–20 mA signals with isolated channels, ensuring precise and reliable performance. Its eight isolated input channels prevent interference, maintaining system integrity in industrial automation networks.
Key Features
- Supports 8 isolated input channels for accurate analog signal acquisition.
- Handles input currents up to 25 mA with ±0.1% full-scale accuracy.
- Provides a fast data refresh cycle of 10 ms and step response of 100 ms.
- Operates with a transmitter power supply range of 20.2–29.3 V DC.
- Incorporates HART communication for configuration and diagnostics.
- Built-in overcurrent protection safeguards the module and connected devices.
- Compact and lightweight design (0.3 kg) allows flexible installation.
- Fallback options include HOLD and SETV, with 4-second detection time.
- Connects via pressure clamp terminals or MIL connector cables.
Technical Specifications
| Specification | Value |
|---|---|
| Model | NFAI135-S51 |
| Series | NFAI135 |
| Number of Input Channels | 8 (isolated) |
| Input Signal | 4–20 mA |
| Allowable Input Current | Up to 25 mA |
| Accuracy | ±0.1% full scale |
| Data Refresh Cycle | 10 ms |
| Step Response Time | 100 ms input |
| Withstanding Voltage | 500 V AC between channels and system |
| Power Supply | 20.2–29.3 V DC |
| Temperature Drift | Max. ±0.01%/°C |
| Maximum Current Consumption | 360 mA (5 V DC), 450 mA (24 V DC) |
| HART Communication | Supported |
| External Connections | Pressure clamp terminals or MIL connector |
| Weight | 0.3 kg |
| Fallback Function | HOLD, SETV (4-second detection) |
Models and Suffix Codes
- Model: NFAI135 Analog Input Module, 8 channels, isolated
- Suffix Codes:
- -S: Standard type
- 5: No explosion protection
- 1: ISA Standard G3 option
Notes
- Requires a 24 V DC analog field power supply for proper operation.
- Do not use Zener barriers; use isolation barriers for intrinsically safe setups.
- HART communication enables bidirectional configuration and diagnostics.
Details
| Weight | 0.3 kg |
|---|
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