Huawei SUN2000-4.6KTL-L1 Quick Manual page 11

3.7
(Optional) Installing Signal Cables
• When laying out a signal cable, separate it from power cables to avoid strong signal
interference.
• Ensure that the protective 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.
• Block the unused cable hole using a cap and tighten the cable gland.
•
If more than one signal cables are required, ensure that they have the same outer diameter.
COM Port Pin Definitions
No. Label Definition
1 485B1 RS485B, RS485 differential signal– Solar inverters cascading scenario: used for
2 485A1 RS485A, RS485 differential signal+
3 485B2 RS485B, RS485 differential signal– Used for connecting to the RS485 signal ports of
4
485A2 RS485A, RS485 differential signal+
5 GND GND of the enable
signal/12V/DI1/DI2
6 EN+ Enable signal+/12V+
7 DI1 Digital input signal 1+
8 DI2 Digital input signal 2+
Crimping Two Signal Cables
COM port (COM)
Description
connecting to the solar inverters.
the battery and power meter. When both battery
and power meter are configured, they need be
crimped to the 485B2 and 485A2 ports.
Used for connecting to GND of the enable
signal/12V/DI1/DI2.
Used for connecting to the enable signal of the
battery and the 12V positive signal.
Used to connect to the DI1 positive signal. It can be
used for connecting to the DRM0 scheduling signal
or serve as a port for the rapid shutdown signal.
Used to connect to the DI2 positive signal. It can
serve as a port for the feedback signal of the
Backup Box.
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