1. Introduzione
This manual provides detailed instructions for the installation, operation, and maintenance of the Avoltik Huawei Smart Power Sensor DTSU666-H. This high-quality, three-phase current sensor is designed for use in photovoltaic (PV) systems, offering precise energy measurement and reliable communication capabilities.
Leghjite attentamente stu manuale prima di l'installazione è di l'usu per assicurà un usu sicuru è efficiente di u dispusitivu.
2. Caratteristiche di u produttu
- Three-Phase Current Sensor: Specifically designed for solar power systems.
- Wide Voltage Gamma: Operates efficiently within a voltage gamma da 176 a 288 Volt.
- Low Self-Consumption: Features very low power consumption, less than one Watt.
- Installazione faciule: Designed for straightforward and effortless setup.
- Schermu LCD integratu: Displays performance data and allows for easy operation directly on the device.
- Comunicazione RS485: Supports data communication via RS485, enabling remote data reading.
- Modbus-RTU Protocol: Utilizes the Modbus-RTU communication protocol for seamless integration.

Image: The Smart Power Sensor DTSU666-H with visual callouts for its main features, including its three-phase capability, easy installation, LCD screen, RS485 communication, and low power consumption.
3. Specifiche tecniche
| categuria | Specificazione |
|---|---|
| Mudellu | DTSU666-H 250/50 mA |
| Dimensioni (H x L x P) | 100 x 65.5 x 72 mm |
| Weight (incl. cable) | 1.5 kg |
| Tipu di muntatura | Ferrovia DIN35 |
| Tipu attuale | 3P4W (3-Phase) |
| Input Voltage | 176-288 VAC (Phase/N) |
| Cunsumu d'energia | ≤ 1 W |
| Interfaccia di cumunicazione | RS485 |
| Baud Rate | 9,600 bps |
| Protocolu di cumunicazione | Modbus-RTU |
| Precisione di misurazione (Voltage) | ± 0.5 % |
| Measurement Accuracy (Current/Power/Energy) | ± 1 % |
| Measurement Accuracy (Frequency) | ± 0.01 Hz |
| Measurement Range (Phase-Phase Voltage) | 304 - 499 Vac |
| Measurement Range (Phase Voltage) | 176 - 288 Vac |
| Measurement Range (Current) | 0 - 250 A |
| Gamma di temperatura di funziunamentu | -25 °C à +60 °C |
| Gamma di temperatura di almacenamiento | -40 °C à +70 °C |
| Umidità Relativa | 5 % RH - 95 % RH |

Image: A detailed table outlining the technical specifications of the DTSU666-H Smart Power Sensor, including dimensions, weight, electrical parameters, and environmental conditions.
4. Cuntenutu di u pacchettu
À l'apertura di u pacchettu, verificate chì tutti i cumpunenti sò presenti è integri:
- 1x DTSU666-H Smart Power Sensor
- Current Transformers (250A/50mA)
- Necessary connection cables

Image: The complete package contents, showing the DTSU666-H Smart Power Sensor alongside its current transformers and connection cables.
5. Setup è Installazione
The DTSU666-H Smart Power Sensor is designed for easy installation, typically on a DIN35 rail. Ensure all safety precautions are followed during installation, especially when dealing with electrical systems.
5.1 Istruzzioni di sicurità
- L'installazione deve esse fatta solu da u persunale qualificatu.
- Disconnect all power sources before beginning installation.
- Purtate l'equipaggiu di prutezzione persunale (PPE) adattatu.
- Assicurà una messa à terra curretta.
5.2 Muntà u dispusitivu
- Locate a suitable DIN35 rail within your electrical panel or enclosure.
- Snap the DTSU666-H sensor onto the DIN rail until it clicks securely into place.
5.3 Cunnessioni Elettriche
Connect the sensor according to the wiring diagram provided with your PV system documentation. Key connections include:
- Voltage Inputs: Connect the three-phase voltage lines (L1, L2, L3) and neutral (N) to the corresponding terminals on the sensor.
- Current Transformer (CT) Connections: Connect the supplied current transformers to the main current lines of your PV system. Ensure correct polarity and connect the CT secondary wires to the sensor's current input terminals.
- Comunicazione RS485: Connect the RS485 A and B terminals to your communication network (e.g., inverter, data logger) for Modbus-RTU communication.

Image: The DTSU666-H Smart Power Sensor shown in an installed context, emphasizing its role in a solar power system.
6. Operazione
Once installed and powered on, the DTSU666-H will begin measuring electrical parameters. The integrated LCD screen allows for direct monitoring and basic configuration.
6.1 Schermu LCD è Navigazione
The LCD screen displays various real-time data such as voltage, current, power, and energy consumption. Use the buttons below the screen to navigate through the display menus:
- Pulsante SET: Enters configuration mode or confirms a selection.
- Button ESC: Esce da un menu o annulla un'operazione.
- Pulsanti Freccia (Sinistra/Destra): Navigates between different display screens or adjusts values in configuration mode.
6.2 Data Monitoring
Regularly check the LCD display for key operational data. For detailed analysis and historical data, connect the sensor to a compatible monitoring system via the RS485 interface and Modbus-RTU protocol.
7. Mantenimentu
The Avoltik Huawei Smart Power Sensor DTSU666-H requires minimal maintenance. Regular checks can help ensure its longevity and accurate performance.
- Pulizia: Mantene l'apparechju pulitu è senza polvere. Aduprate un pannu dolce è asciuttu per a pulizia. Ùn aduprate micca detergenti abrasivi o solventi.
- Cuntrolli di cunnessione: Verificate periodicamente tutte e cunnessione elettriche per assicurassi ch'elle sianu sicure è prive di corrosione.
- Cundizioni Ambientali: Assicuratevi chì l'ambiente operativu resti in i limiti di temperatura è umidità specificati per prevene danni.
No user-serviceable parts are inside the device. Do not attempt to open or repair the sensor yourself.
8. Risoluzione di prublemi
This section provides solutions to common issues you might encounter with your DTSU666-H Smart Power Sensor.
| Prublemu | Causa Possibile | Soluzione |
|---|---|---|
| Device not powering on / LCD blank | No power supply; Loose connections; Faulty device. | Check power input connections. Ensure circuit breaker is on. Verify voltage supply. If problem persists, contact support. |
| Incorrect readings on LCD | Incorrect CT wiring; Incorrect CT polarity; Sensor not calibrated. | Verify CT connections and polarity according to the wiring diagram. Ensure CTs are correctly sized for the application. |
| No communication via RS485 | Incorrect wiring (A/B reversed); Incorrect baud rate; Termination resistor missing/incorrect; Software configuration issue. | Check RS485 wiring (A to A, B to B). Verify baud rate and protocol (Modbus-RTU) settings on both sensor and master device. Ensure proper termination. |
| Surriscaldamentu di u dispusitivu | Poor ventilation; Overload; High ambient temperature. | Ensure adequate ventilation around the device. Check if the current load exceeds the sensor's rating. Relocate to a cooler environment if necessary. |
If you encounter issues not listed here or if the suggested solutions do not resolve the problem, please contact Avoltik customer support.
9. Garanzia è Support
Avoltik products are manufactured to the highest quality standards. For warranty information, please refer to the warranty card included with your product or visit the official Avoltik websitu.
For technical support, troubleshooting assistance, or spare parts, please contact Avoltik customer service:
- Websitu: Avoltik Official Store
- E-mail: [Refer to product packaging or website for specific email]
- Telefonu: [Refer to product packaging or website for specific phone number]
Please have your product model (DTSU666-H) and purchase date ready when contacting support.
10. Applicazioni Versatili
The Avoltik Huawei Smart Power Sensor DTSU666-H is a versatile and reliable solution suitable for various solar energy applications, ensuring optimal performance and monitoring.

Image: An illustration showing the versatility of solar power systems, indicating their applicability for roofs, open fields, boats, and balconies, all of which can benefit from the DTSU666-H sensor.





