protech ProX-1635LF - COM Port Connector

Chapter 2 Hardware Configuration
Prox-1635LF USER ′ S MANUAL
Page: 2-7
2-4. COM PORT CONNECTOR
There are two COM port enhanced in this board namely: COM1 & COM2.
COM1 is fixed for RS-232, while COM2 is selectable for RS-232/422/485.
COM1 : COM1 Connector
The COM1 Connector assignments are as follows:
PIN ASSIGNMENT
1 DCD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
COM2 : COM2 Connector
The COM2 Connector assignments are as follows:
PIN ASSIGNMENT
RS-232 RS-422 RS-485
1 DCD TX- TX-
2 RX TX+ TX+
3 TX RX+ RX+
4 DTR RX- RX-
5 GND GND GND
6 DSR RTS- NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
10 NC NC NC
COM1