Product manual

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Figure 22 RS232 Communication Cable and Interface
Table 6 RS232 Pin Definition
Pin
1 2 3 4 5 6 7 8 9
Function
NC TxD RxD NC Common (GND) NC NC NC NC
One inverter can only be communicated with one PC at the same time through RS232
port. Thus this method is generally used for single inverter’s communication, for
examples，software updating and serviceman’s testing.
② RS485 Communication (Several inverters)
●Communication
RS485 is generally for multi inverters’ communication. Up to 32 inverters could
communicate at the same time, but wire length should be≤1200m. System monitor
SolarPower Manager should be configured to realize one PC communicates with multi
inverters at the same time. Through PC SolarPower Manager could get real time PV
plants operating data. Please see Installation Guide of SolarPower Manager for more
information.
Figure 23 RS485 Interface of SolarRiver Series Inverter
PIN 1