The DNA921 is a professional-grade combined wind sensor integrating cup anemometer and wind vane with RS485 Modbus output. Featuring IP66 protection, 0.05 m/s resolution, and 75 m/s damage limit, it delivers dual-parameter monitoring for meteorological stations, wind energy, and industrial applications. Operates at 0.5W power across -30°C to 80°C.
Overview
The DNA921 is a professional-grade combined wind sensor integrating cup anemometer and wind vane with RS485 Modbus output. Featuring IP66 protection, 0.05 m/s resolution, and 75 m/s damage limit, it delivers dual-parameter monitoring for meteorological stations, wind energy, and industrial applications. Operates at 0.5W power across -30°C to 80°C.
Detailed Description
Integrated Wind Monitoring Solution
Combining a 32-step optoelectronic anemometer and Hall-effect vane, the DNA921 simplifies installation while maintaining laboratory-grade accuracy (±0.25 m/s speed, 1% direction error). Its Modbus-RTU/TTY-ASCII protocols enable seamless integration with SCADA systems and LSI LASTEM's E-Log/Alpha-Log data loggers.
Ruggedized for Critical Applications
With anodized aluminum housing and fiberglass-reinforced cups, the sensor withstands marine environments and storm-force winds. The sealed bearing system eliminates lifetime maintenance, while galvanic insulation (3kV) protects RS485 lines from lightning strikes—essential for wind farms and remote sites.
Key Advantages
- Dual output: RS485 Modbus for speed/direction + configurable protocols
- 0.15 m/s directional threshold captures subtle wind shifts
- VDI3786/ASTM-compliant damping (0.21 @10 m/s) reduces oscillation
- Galvanic isolation ensures surge protection up to 3kV
- ISO17025 factory calibration with traceable certificates
Technical Specifications
| Parameter | Value |
|---|---|
| Order number | DNA921 |
| Wind speed range | 0–60 m/s (75 m/s damage limit) |
| Speed accuracy | ±0.25 m/s or 3% (0–25 m/s), 2% (>25 m/s) |
| Direction accuracy | 1% of reading |
| Output | RS485 (Modbus-RTU/TTY-ASCII) |
| Protocol configuration | Hyperterminal |
| Baud rate | 1200–115,000 bps |
| Power supply | 10–30V AC/DC |
| Power consumption | 0.5W |
| EMC | EN61326-1:2013 |
| Connector | 7-pin IP65 |
| Mounting | Ø 48–50 mm mast |
Usage Guidelines
Installation & Networking
Mount on vertical mast using included clamp. Use DWA5xxA cables (5–100m) with MG2251 connectors. Configure Modbus address and baud rate via Hyperterminal. For networks exceeding 32 nodes, add RS485 repeaters.
Maintenance & Calibration
Inspect cups/vanes annually for debris. Replace bearings (MM2011/MM2020) only if damaged—sealed design typically requires no intervention. Recalibrate every 2 years with ISO17025 certificates (SVACA2216).
| Brand | LSI-Lastem |
