Suntrio Plus Series
-30-
5.5 Communication Connection
Suntrio Plus 12K/15K/17K/20K/25K/33K/40K/50K/60K is equipped with a
RS232 and RS485 interface.
Figure 5.10 Pins of Nine Serial Port Cable
Table 5.5 Instruction of Nine Serial Port Pins
Pin No. Name
1DCD
（
Data Carrier Detect
）
2RxD
（
Received Data
）
3TxD
（
Transmitted Ready
）
4DTR
（
Data Terminal
）
5GND
（
Signal Ground
）
6DSR
（
Data Send Ready
）
7 RTS (Request To Send)
8CTS(ClearToSend)
9 RI(Ring Indicator)
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 Wi-Fi module.For more details, please refer
to the operating manual of Ethernet module.
3
）
RS232 can externally connect with Wi-Fi 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
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