Communication Connection - Sunways ST 30 User Manual

6.6 Communication Connection

6.6.1 Communication Overview
The inverter operation information can be transferred via its integrated RS485 interface to a PC or to data
logging device.
RS485 is the standard communication choice for inverter.
There are communication terminals (RS485) at the bottom of the inverter. And there apply two optional
connection terminals on the configuration circuit board: RS485 A/B terminal blocks and RJ45 plug in
terminals.
If a terminating resistor is necessary switch on the 120 Ω terminating resistor switch. A terminating resistor
will be connected between the communication cables of the inverter.
Before communication connection, prepare communication cable and RJ45 plug.
6.6.2 Communication System
For Single Inverter
Where there is only one inverter, a RS485 cable enables connection between inverter and data logging device.
Fig. 6-6 Communication related devices on the Configuration Circuit Board
RS485 cable requirements to ensure quality of communication:

Twist-pair type cable

Twist-pair type shielding Ethernet cable
A converter such as RS485-232 converter, which converts 485 to 232 signal, is
needed between inverter and PC.
* Resistor necessary if not included in the end device
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