1. Introduction
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.
Veuillez lire attentivement ce manuel avant l'installation et l'utilisation afin de garantir une utilisation sûre et efficace de l'appareil.
2. caractéristiques du produit
- Three-Phase Current Sensor: Specifically designed for solar power systems.
- Vol largetagGamme : Operates efficiently within a voltagLa plage de 176 à 288 Volts.
- Faible autoconsommation : Features very low power consumption, less than one Watt.
- Installation facile : Designed for straightforward and effortless setup.
- Écran LCD intégré : Displays performance data and allows for easy operation directly on the device.
- Communication RS485: Supports data communication via RS485, enabling remote data reading.
- Protocole Modbus-RTU : 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. Spécifications techniques
| Catégorie | Spécification |
|---|---|
| Modèle | DTSU666-H 250/50 mA |
| Dimensions (H x L x P) | 100 x 65.5 x 72 mm |
| Weight (incl. cable) | 1.5 kg |
| Type de montage | Rail DIN35 |
| Type actuel | 3P4W (3-Phase) |
| Vol d'entréetage | 176-288 VAC (Phase/N) |
| Consommation d'énergie | ≤ 1 W |
| Interface de communication | RS485 |
| Débit en bauds | 9,600 bps |
| Protocole de communication | Modbus RTU |
| Précision de mesure (Voltage) | ±0.5 % |
| Measurement Accuracy (Current/Power/Energy) | ±1 % |
| Measurement Accuracy (Frequency) | ±0.01 Hz |
| Measurement Range (Phase-Phase Voltage) | 304-499 Vca |
| Measurement Range (Phase Voltage) | 176-288 Vca |
| Plage de mesure (courant) | 0 - 250 A |
| Plage de température de fonctionnement | -25°C à +60°C |
| Plage de température de stockage | -40°C à +70°C |
| Humidité relative | 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. Contenu du colis
À l'ouverture du colis, veuillez vérifier que tous les composants sont présents et non endommagés :
- 1x DTSU666-H Smart Power Sensor
- Current Transformers (250A/50mA)
- Câbles de connexion nécessaires

Image: The complete package contents, showing the DTSU666-H Smart Power Sensor alongside its current transformers and connection cables.
5. Configuration et installation
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 Consignes de sécurité
- L'installation doit être effectuée uniquement par du personnel qualifié.
- Disconnect all power sources before beginning installation.
- Portez un équipement de protection individuelle (EPI) approprié.
- Assurez une bonne mise à la terre.
5.2 Montage de l'appareil
- 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 Connexions électriques
Connect the sensor according to the wiring diagram provided with your PV system documentation. Key connections include:
- Voltage Entrées : 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.
- Communication 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. Fonctionnement
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 Écran LCD et navigation
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:
- Bouton de réglage: Enters configuration mode or confirms a selection.
- Bouton ÉCHAP : Quitte un menu ou annule une opération.
- Boutons fléchés (gauche/droite) : Navigates between different display screens or adjusts values in configuration mode.
6.2 Surveillance des données
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. Entretien
The Avoltik Huawei Smart Power Sensor DTSU666-H requires minimal maintenance. Regular checks can help ensure its longevity and accurate performance.
- Nettoyage: Veillez à ce que l'appareil reste propre et exempt de poussière. Utilisez un chiffon doux et sec pour le nettoyer. N'utilisez pas de produits nettoyants abrasifs ni de solvants.
- Vérifications de connexion : Inspectez périodiquement toutes les connexions électriques pour vous assurer qu'elles sont bien fixées et exemptes de corrosion.
- Conditions environnementales : Veillez à ce que l'environnement d'exploitation reste dans les plages de température et d'humidité spécifiées afin d'éviter tout dommage.
No user-serviceable parts are inside the device. Do not attempt to open or repair the sensor yourself.
8. Dépannage
This section provides solutions to common issues you might encounter with your DTSU666-H Smart Power Sensor.
| Problème | Cause possible | Solution |
|---|---|---|
| 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. |
| Surchauffe de l'appareil | 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. Garantie et assistance
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 website.
For technical support, troubleshooting assistance, or spare parts, please contact Avoltik customer service:
- Website: Avoltik Official Store
- E-mail: [Refer to product packaging or website for specific email]
- Téléphone: [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. Applications polyvalentes
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.





