Huawei LUNA2000-30-S0 Quick Manual page 14

Installing a Signal Cable
4.5
When laying out a signal cable, separate it from power cables and keep it away from strong
•
interference sources to prevent communication interruption.
• Ensure that the protection layer of the cable is inside the connector, that excess core wires
are cut off from the protection layer, that the exposed core wire is totally inserted into the
cable hole, and that the cable is connected securely.
• Use a plug to block the idle cable hole with the waterproof rubber ring, and then tighten the
locking cap.
• If multiple signal cables need to be connected, ensure that the outer diameters of the signal
cables are the same.
COM Port Pin Definitions
The COM port definitions on both sides of the power control module are the same. It is
recommended that the COM port on the switch side be connected to the inverter and the COM port
on the other side be connected to the cascaded battery.
No. Label Definition
1 PE Ground point on the shield
layer
2 Enable- Enable signal GND
3 Enable+ Enable signal+/12V+
4 485A1 RS485B, RS485 differential
signal+
5 485A2 RS485A, RS485 differential
signal+
6 485B1 RS485B, RS485 differential
signal–
7 485B2 RS485A, RS485 differential
signal–
8 CANL Extended CAN bus port
9 CANH Extended CAN bus port
10 PE Ground point on the shield
layer
Description
Ground point on the shield layer
Connects to the enable signal GND of the
inverter.
Connects to the enable signal of the inverter and
the positive terminal of the 12 V power supply.
Connects to the RS485 signal port of the
inverter.
Connects to the RS485 signal port of the
inverter.
Used for signal cable cascading in battery
cascading scenarios.
Used for signal cable cascading in battery
cascading scenarios.
Ground point on the shield layer
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