Suntrio Plus Series
- 25 -
Pin No.
Name
1
VCC
2
TXD
（
transmit external data
）
3
RXD
（
receive external data
）
4
NC
5
GND
（
Signal Ground
）
6
NC
7
NC
8
NC
9
VCC
Table 5.5 Instruction of nine serial port pins
①
RS232 can externally connect with Wi-Fi module. For more details,
please refer to the operating manual of Wi-Fi module.
②
RS232 can externally connect with Ethernet module. For more
details, please refer to the operating manual of Ethernet module.
③
RS232 can externally connect with GPRS module. For more details,
please refer to the operating manual of GPRS module.
When using RS485 for monitoring, multi- point monitoring can be achieved
by connecting the inverter with RS485 cable. Each connection port should
be attached to the connector as shown in Figure 5.11 and Table 5.4. Make
sure the connection is tight and secure.
