1. Important Safety Instructions
WARNING !
- This product does not feature an explosion-proof structure and must not be used in flammable environments, such as those containing flammable gases, liquids, or explosives.
SAFETY INFORMATION !
- Please use this product in accordance with the instructions in this manual.
- Do not disassemble this product by yourself.
- Pay attention to the rated voltage for use.
2. Product Overview
The EARU DDS665 is a single-phase, 2-wire digital energy meter designed for measuring both city power energy and negative power energy, such as that generated by solar PV systems or generators. It provides real-time display of various electrical parameters and supports RS485 (MODBUS-RTU) communication for data transmission.
Key Features:
- Bi-directional Measurement: Measures both positive (grid consumption) and negative (generation from solar/generator) active energy.
- Real-time Display: Shows Total Active Energy (KWh), Positive Active Energy (KWh), Negative Active Energy (KWh), Temporary Active Energy (KWh), Voltage (V), Current (A), Active Power (W), Power Factor (PF), and Frequency (Hz).
- LCD Display: Clear LCD with backlight for easy reading.
- RS485 Communication: Supports MODBUS-RTU protocol for data transmission (transmission only).
- DIN Rail Installation: Designed for easy mounting on a 35mm DIN rail.
- Temporary KWh Reset: Allows resetting of temporary energy readings.
3. Specifications
| Parameter | Value |
|---|---|
| Model Number | DDS665 |
| Phase | Single-phase |
| Rated Voltage | 230V (AC 220/230V) |
| Max Operating Current | 5(100)A |
| Rated Frequency | 50Hz |
| Accuracy Class | 1.0 |
| Constant Pulse | 1600imp / kWh |
| Starting Current | 0.004Ib |
| Power Consumption | ≤2W, 10VA |
| Display Type | Digital Only (LCD with Backlight) |
| Operating Temperature | -20℃ to +55℃ |
| Storage Temperature | -25℃ to +70℃ |
| Dimensions | 90mm x 45mm x 70mm |
| Installation | 35mm DIN Rail |
| Certification | CE |
| Battery Included | No |
| High-concerned chemical | None |
4. Installation and Wiring
The DDS665 energy meter is designed for easy installation on a standard 35mm DIN rail.
4.1 DIN Rail Mounting
Securely attach the meter to a 35mm DIN rail in your electrical panel. Ensure it clicks into place firmly.
4.2 Electrical Wiring
Follow the wiring diagram carefully. Incorrect wiring can damage the device or lead to inaccurate readings. Ensure all connections are tight and secure.
- N IN / L IN: Connect the neutral and live wires from the power source to the 'N IN' and 'L IN' terminals respectively.
- N OUT / L OUT: Connect the neutral and live wires to the load from the 'N OUT' and 'L OUT' terminals respectively.
- Impulse Output (23+, 22-): These terminals provide pulse output for external devices.
- RS485 Communication (21-RS485 A, 20-RS485 B): Connect your RS485 communication lines to these terminals for data transmission.
4.3 Bi-Directional Measurement Setup
For solar PV or generator applications, the meter can be integrated to measure energy flow in both directions (to and from the grid). The diagram below illustrates a typical setup.
5. Operation
The DDS665 meter features a simple interface for viewing various electrical parameters.
5.1 Display Navigation
The meter's display cycles through different parameters automatically. You can also manually switch between displays by pressing the button located on the front of the meter.
Video 5.1: Demonstration of the DDS665 meter display cycling through various electrical parameters.
5.2 Resetting Temporary KWh
To reset the temporary KWh reading to zero, press and hold the button on the meter for 6 seconds. Note that the total active energy (Total KWh) cannot be reset.
6. User Tips
- Frequency Compatibility: The meter is rated for 50Hz frequency. While it may function on 60Hz systems, its accuracy and long-term performance are optimized for 50Hz. Consult a qualified electrician if you intend to use it on a 60Hz system.
- Temporary vs. Total KWh: Remember that only the temporary KWh can be reset. The total KWh provides a cumulative record of energy consumption/generation.
7. Troubleshooting
If you encounter issues with your DDS665 energy meter, consider the following common troubleshooting steps:
- No Display/Power: Check the input power connections (L IN, N IN) to ensure they are correctly wired and receiving power. Verify the voltage supply is within the rated 230V.
- Inaccurate Readings: Double-check all wiring connections according to the diagram (Figure 4.3). Ensure the current direction is correct for bi-directional measurement. Verify the load is within the meter's rated current range.
- RS485 Communication Issues: Ensure the RS485 A and B terminals are correctly connected to your communication device. Verify the baud rate and other communication settings match between the meter and your device. Remember the meter only supports transmission.
- Cannot Reset Total KWh: This is normal behavior. Only the temporary KWh can be reset.
If problems persist, please contact customer support or a qualified electrician.
8. Maintenance
The DDS665 energy meter is designed for low maintenance. Follow these guidelines to ensure optimal performance and longevity:
- Cleaning: Use a soft, dry cloth to clean the meter's exterior. Do not use abrasive cleaners or solvents.
- Environmental Conditions: Ensure the meter is operated within its specified operating temperature and humidity ranges. Avoid exposure to direct sunlight, excessive moisture, or corrosive environments.
- Regular Inspection: Periodically check wiring connections for tightness and signs of wear or damage.
9. Warranty and Support
For detailed warranty information, please refer to the product's official documentation or contact the seller directly. Keep your purchase receipt as proof of purchase.
A comprehensive user manual in PDF format is available for download: User Manual (PDF)
For technical support or inquiries, please contact EARU customer service through your purchase platform.
