protech ProX-1690, User Manual, Page: 17 / 95

Chapter 2 Hardware Configuration
Page: 2-6
Prox-1690 USER
’
S MANUAL
2-4. COM PORT CONNECTOR
Prox-1690 possesses two Communication Port namely the COM1 and COM2.
The difference between the two is that 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
1
6
5
10
COM 2
COM 1
1
6
5
10