Sunfree Series
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5.7 Communication Connection
5.7.1 Serial Port Definition
Sunfree Series Hybrid Inverter has a RS232 communication port Integrated .
Figure 5.15 9-Pin serial port
Pin Number
Description
Effect
1
DCD
（
Data Carrier Detect
）
Data carrier detection
2
RxD
（
Received Data
）
Serial data input
3
TxD
（
Transmitted Ready
）
Serial data output
4
DTR
（
Data Terminal
）
Data terminal ready
5
GND
（
Signal Ground
）
Ground line
6
DSR
（
Data Send Ready
）
Data Send Ready
7
RTS (Request To Send)
Request To Send
8
CTS (Clear To Send)
Clearly Send
9
RI (Ring Indicator)
Ringtone
Table 5.5 9-Pin serial port introduction
(1) RS232 connect with Wi-Fi module, please reference Wi-Fi user manual.
(2) RS232 connect with Ethernet module, please reference Ethernet user manual.
(3) RS232 connect with GPRS module, please reference GPRS user manual.
