Description
Product Overview
- Model: NFAI835-S51 is a high-precision analog I/O module designed by Yokogawa.
- It delivers 4-channel input and 4-channel output with full channel isolation.
- The module supports 4 to 20 mA signals for both input and output operations.
- It integrates HART communication capability for advanced field diagnostics.
- Engineers use it in DCS and PLC systems for stable signal acquisition and control.
- Its compact design reduces cabinet space and simplifies wiring.
Key Technical Data
- Brand: Yokogawa
- Model: NFAI835-S51
- I/O Configuration: 4 AI + 4 AO, isolated channels
- Signal Range: 4 to 20 mA
- Input Current Limit: 25 mA maximum
- Load Resistance: 0 to 750 Ω
- Accuracy: Input ±0.1% FS, Output ±0.3% FS
- Resolution: High-resolution industrial-grade conversion
- Response Time: 100 ms step response
- Refresh Cycle: 10 ms
- Temperature Drift: ±0.01% per °C maximum
- Isolation Strength: 500 VAC for 1 minute
- Power Consumption: 360 mA at 5 V DC, 450 mA at 24 V DC
- Transmitter Supply: 20.2 to 29.3 V DC
- Weight: 0.3 kg
- Anti-Interference: Strong EMC resistance for industrial environments
- Environmental Tolerance: Stable performance under temperature fluctuations
Suffix Code Structure
- -S51
- -S: Standard type
- 5: No explosion protection
- 1: ISA Standard G3 option
Installation Guidelines
- Use pressure clamp terminals for secure wiring.
- Support MIL connector cables for flexible installation.
- Ensure proper grounding to reduce electrical noise.
- Install in a ventilated control cabinet.
Commissioning & Maintenance
- Quick configuration using standard DCS engineering tools.
- Supports per-channel fallback settings.
- HART enables remote calibration and diagnostics.
- Low maintenance due to stable solid-state design.
Compatibility
- Fully compatible with Yokogawa CENTUM and ProSafe systems.
- Works with standard 4–20 mA field instruments.
- Integrates with smart transmitters using HART protocol.
Applications
- Process control systems in oil and gas plants.
- Power generation monitoring systems.
- Chemical and petrochemical automation.
- Water treatment and environmental systems.
- Industrial manufacturing control loops.
Diagnostic Capabilities
- Real-time signal monitoring with high refresh rate.
- Fault detection through HART communication.
- Channel-level alarm and fallback configuration.
- Improved troubleshooting efficiency.
Certifications & Compliance
- ISA Standard G3 environmental protection.
- Industrial EMC compliance.
- Designed for harsh industrial environments.
Packing List & Warranty
- 1 × Yokogawa NFAI835-S51 Module
- 1 × Standard packaging box
- 1 × Quality inspection report
- 12-month warranty
Shipping Methods
- FedEx International Priority
- UPS Express Saver
- DHL Express Worldwide
PLCDCS HUB’s Insight
- This module stands out for accuracy and stability in analog signal handling.
- Its HART integration improves maintenance efficiency significantly.
- The isolation design ensures high system reliability.
- It is ideal for mission-critical industrial control systems.
FAQ
- What makes this module reliable in harsh environments?
- It uses strong isolation and EMC protection.
- Can it work with third-party transmitters?
- Yes, it supports standard 4–20 mA devices.
- How does HART improve operations?
- It allows remote diagnostics and parameter adjustment.
- Is calibration required frequently?
- No, it maintains long-term accuracy with minimal drift.
- How to choose between similar modules?
- Select based on channel count, isolation, and HART needs.
Selection Guide
- Choose NFAI835-S51 for high accuracy analog control.
- Select models with HART for smart instrumentation.
- Check isolation requirements for critical processes.
- Ensure compatibility with your DCS platform.
Contact:
+86 158 8020 0923
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