(Optional) Connecting Signal Cables
Context
When laying out signal cables, separate them from power cables and keep them away from strong interference sources to prevent communication interruption.
No. |
Label |
Definition |
Single SUN2000 Scenario |
SUN2000 Cascading Scenario |
|---|---|---|---|---|
1 |
485B1 |
RS485B, RS485 differential signal– |
- |
Used for connecting to the solar inverters. |
2 |
485A1 |
RS485A, RS485 differential signal+ |
||
3 |
485B2 |
RS485B, RS485 differential signal– |
Used for connecting to the RS485 signal ports of the battery and smart power sensor. When both battery and power meter are configured, they need be crimped to the 485B2 and 485A2 ports. |
Used for connecting to the RS485 signal ports of the battery and smart power sensor. When both battery and smart power sensor are configured, they need be crimped to the 485B2 and 485A2 ports. |
4 |
485A2 |
RS485A, RS485 differential signal+ |
||
5 |
GND |
GND of the enable signal/12V/DI1/DI2 |
Used for connecting to GND of the enable signal/12V/DI1/DI2. |
|
6 |
EN+ |
Enable signal+/12V+ |
Used for connecting to the enable signal of the battery and the 12V positive signal. |
|
7 |
DI1 |
Digital input signal 1+ |
Used for connecting to the DI1 positive signal. It can be used for connecting to the DRM0 scheduling signal or reserved for the rapid shutdown signal. |
|
8 |
DI2 |
Digital input signal 2+ |
Used for connecting to the DI2 positive signal. It can be reserved for the feedback signal of the Backup device. |
|
For details about how to connect signal cables, see the SUN2000L-(2KTL-5KTL) and SUN2000-(2KTL-6KTL)-L1 Battery and Smart Power Sensor Quick Guide. You can also scan the QR code to obtain the document.
Communication Networking Mode
The smart power sensor and Smart Dongle must be connected to the same SUN2000.
- Single SUN2000 scenariosFigure 5-19 Single SUN2000Figure 5-20 Connecting cables to the smart power sensor (single SUN2000)
- SUN2000 cascading scenarios
- In-phase grid connectionFigure 5-21 In-phase grid connectionFigure 5-22 Connecting cables to the smart power sensor (in-phase grid connection)
- In cascading scenarios, the inverters are required to connect to the management system through a Smart Dongle.
- In the preceding networking, the SUN2000s are cascaded and support the grid-tied point control function to achieve zero export.
- If the SUN2000s requires the grid-tied point control function, they need to be connected to a smart power sensor.
- A single-phase power meter is recommended for the networking with only single-phase inverters.
- If the SUN2000-(2KTL-6KTL)-L1 are cascaded with three-phase inverters, they must be connected to the grid in the same phase.
- Only one LG battery is supported, and the LG battery must be connected to the inverter equipped with the Smart Dongle.
- LG batteries cannot be connected in cascading scenarios.
- In-phase grid connection
Procedure
- Connect signal cables to corresponding signal connectors.
- Ensure that the protection layer of the cable is in the connector. The surplus core should be cut off from the protection layer.
- Ensure that the exposed core is totally inserted into the cable hole.
- Ensure that the signal cables are connected securely.
- Ensure that the cables are not twisted.
- If multiple signal cables need to be connected to a single connector, ensure that the outer diameters of the signal cables are the same.
Figure 5-23 Crimping two signal cablesFigure 5-24 Crimping three signal cablesFigure 5-25 Assembling a signal connector (single SUN2000)Figure 5-26 Assembling a signal connector (SUN2000 cascading) - Connect the signal connector to the corresponding port.
Ensure that the signal connector is connected securely.
Figure 5-27 Securing a signal connector
