Chapter 2 Hardware Configuration
Page: 2-6
ISA-382LF 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
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
CTS- NC
10 NC
NC
NC
COM1
9
6
1
5
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