Communication Wiring Board; Rs485 Connection; Interface Description - Sungrow SG30CX User Manual

5 Electrical Connection

5.9 Communication Wiring Board

The communication board of the inverter includes two layers. The upper layer communi-
cation board mainly includes RS485 communication interfaces while the lower layer
communication board mainly includes DI/DO interface and DRM interface.

5.10 RS485 Connection

5.10.1 Interface Description

As shown in the Figure below, the inverter is equipped with three RS485 communication
interfaces and one dip switch.
All three interfaces can be connected to a data acquisition device (Data Logger), to
achieve data exchange with PC or other monitoring devices.
The RS485-1 crimp and the RJ45 interface can be applied to applications where multi-
ple inverters communicate in a daisy-chain form.
A 120Ω resistor can be connected in parallel between RS485-1 A/B pins by configuring
the dip switch.
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