User Manual of String Inverter
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3.6.7 Connect the communication cable
Selection of communication method
The inverter supports anti-backflow interface and RS485 communication.
Connecting the cables
Connect RS485 cables
1) Take out the anti-backflow communication terminal from the accessories. Insert the
terminal communication cables which have been crimped and reinforce them with bolts.
As for the scenario that the 485 loop grid works, it is necessary to short-circuit the
matching resistance of the fourth pin of the inverter at the end and the first pin in the
figure below. And that will improve the quality of the communication. There is no need to
short-circuit them in other occasions.
1：RS485+
2：PE
3：RS485-
4：Ter minal mat chi ng r esi st ance
I nst al l at i on buckl e bel ow
Figure 3-10 Connect cables to the terminal
2) Insert the communication terminal into the anti-backflow communication interface after
reassemble the communication terminal. Make sure that the connection is sturdy.
Figure 3-11 Connect the terminal to the inverter
GPRS Communication Mode Connection
Connect the GPRS mode in the accessories to the 4-pin interface of the inverter. Make
sure the connection is sturdy.
Wi-Fi/GPRS
interface
Figure 3-12 Location of the Wi-Fi/GPRS interface
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