protech ProX-1215, User Manual, Page: 19 / 95

Chapter 2 Hardware Configuration
Page: 2-6
Prox-1215 USER
′
S MANUAL
2-4. COM PORT CONNECTOR
There are two COM ports enhanced in this board namely: COM1 and
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 / +5V / +12V selectable
10 NC
COM2 :
COM2 Connector
The COM2 Connector assignments are as follows :
ASSIGNMENT
PIN
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/+5V/+12 CTS- NC
10 NC NC NC
COM1
9
6
1
5
COM 2
1
6
5
10