Eastron SDM230-Modbus Anti-Reverse Flow AC Energy Meter

1. Producte acabatview

The Eastron SDM230-Modbus is a single-phase multi-function energy meter designed to measure active energy (kWh) in AC circuits. It features an anti-reverse flow function, making it suitable for applications with on-grid inverters, such as Growatt systems. The meter communicates via Modbus, allowing for remote monitoring and integration into energy management systems. This model is supplied without an external Current Transformer (CT).

Figure 1: Eastron SDM230-Modbus Energy Meter (Front View)

Figure 2: Eastron SDM230-Modbus Energy Meter (In-box View)

2. Informació de seguretat

• La instal·lació i el manteniment només els ha de dur a terme personal qualificat.
• Ensure all power is disconnected before installation or wiring.
• Seguiu tots els codis i regulacions elèctriques locals.
• No feu funcionar el mesurador si sembla que està danyat.
• The meter is designed for indoor use in a dry environment.

3. Configuració i instal·lació

3.1 Desembalatge

Carefully remove the energy meter from its packaging. Inspect for any signs of damage during transit. Retain the packaging for future transport or storage.

3.2 Muntatge

The SDM230-Modbus is designed for DIN rail mounting. Securely attach the meter to a standard 35mm DIN rail within an appropriate enclosure, ensuring adequate ventilation.

3.3 Connexions de cablejat

Important: This meter is designed for direct connection up to 100A and does not require an external Current Transformer (CT). Ensure all connections are tight and secure to prevent loose contacts and overheating.

Figura 3: Example of prepared wiring for secure connections.

Refer to the terminal diagram on the meter's casing for precise wiring. A typical single-phase connection involves:

• L (Live) Input: Connect the incoming live wire to the designated 'L in' terminal.
• N (Neutral) Input: Connect the incoming neutral wire to the designated 'N in' terminal.
• L (Live) Output: Connect the outgoing live wire to the designated 'L out' terminal.
• N (Neutral) Output: Connect the outgoing neutral wire to the designated 'N out' terminal.
• Modbus (RS485) Connections: Connect the A and B terminals of the meter to your Modbus network or Growatt inverter's communication port. Ensure correct polarity (A to A, B to B).

For specific integration with Growatt single-phase on-grid inverters, consult the Growatt inverter's installation manual for detailed wiring and communication setup instructions.

4. Instruccions de funcionament

4.1 Encès

Once wired correctly, apply power to the circuit. The meter's LCD display should illuminate and show readings.

4.2 Navegació de la pantalla

The meter features an LCD display and typically two buttons below it for navigation. These buttons allow you to cycle through various measured parameters such as:

• Total Active Energy (kWh)
• Voltage (V)
• Corrent (A)
• Potència activa (W)
• Potència reactiva (VAR)
• Factor de potència (PF)
• Freqüència (Hz)

Press the left button to scroll forward through parameters. The right button may be used for backward scrolling or entering settings menus, depending on the specific firmware version. Refer to the detailed product datasheet for a complete list of parameters and navigation specifics.

4.3 Anti-Reverse Flow Function

The meter is equipped with an anti-reverse flow function, which accurately measures energy consumption while preventing the registration of reverse energy flow (e.g., excess solar generation being fed back to the grid) as consumption. This ensures accurate billing and compliance with grid regulations for on-grid solar systems.

4.4 Comunicació Modbus

The SDM230-Modbus uses the Modbus RTU protocol over RS485 for communication. This allows external devices, such as a Growatt inverter or a data logger, to read real-time energy data and other parameters from the meter. Ensure the Modbus address, baud rate, and parity settings are correctly configured on both the meter and the connected device. These settings can typically be adjusted via the meter's display menu or dedicated software.

5. Manteniment

• Neteja: Feu servir un drap suau i sec per netejar l'exterior del mesurador. No utilitzeu productes de neteja abrasius ni dissolvents.
• Inspecció: Periodically check wiring connections for tightness and signs of wear or corrosion.
• Medi ambient: Assegureu-vos que l'entorn de funcionament es mantingui dins dels rangs de temperatura i humitat especificats.
• Sense peces reparables per l'usuari: The meter contains no user-serviceable parts. Do not attempt to open or repair the device.

6. Solució De Problemes

• Sense pantalla: Check power supply to the meter. Ensure input voltage es troba dins del rang especificat (230 V).
• Lectures incorrectes: Verify all wiring connections are correct according to the terminal diagram. Ensure the meter is installed in the correct direction of energy flow.
• Modbus Communication Error: Check RS485 wiring for correct polarity (A/B). Verify Modbus address, baud rate, and parity settings on both the meter and the connected device (e.g., Growatt inverter). Ensure termination resistors are correctly applied if necessary.
• Meter Not Registering Energy: Confirm that current is flowing through the meter. Check for any circuit breakers that may be tripped.

If issues persist, contact technical support or a qualified electrician.

7. Especificacions

8. Consells d'usuari

• Posada a terra: Always ensure proper grounding for safety and optimal performance.
• Compatibilitat de l'inversor: While designed for Growatt inverters, always cross-reference the meter's specifications with your specific inverter model for full compatibility.
• Configuració Modbus: Double-check Modbus settings (address, baud rate, parity) on both the meter and the master device (e.g., inverter or data logger) to establish reliable communication.
• Documentació: Keep this manual and any accompanying documentation from your Growatt inverter in a safe place for future reference.

9. Garantia i Suport

For warranty information, technical support, or service inquiries, please contact the seller, New Solar Store, or the manufacturer, Eastron. Retain your proof of purchase for warranty claims.