
Chapter 2 Hardware Configuration
Page: 2-6
PCI-531LF USER
′
S MANUAL
2-4. COM PORT CONNECTOR
COM1:
COM1 Connector
COM1 is fixed as RS-232.
The pin assignments are as follows:
PIN
ASSIGNMENT
1
DCD1
2
RX1
3
TX1
4
DTR1
5
GND
6
DSR1
7
RTS1
8
CTS1
9
RI1
COM2:
COM2 Connector
The COM2 is selectable as RS-232/422/485.
The pin assignments are as follows:
ASSIGNMENT
PIN
RS-232
RS-422
RS-485
1
DCD2
TX-
TX-
2
RX2
TX+
TX+
3
TX2
RX+
RX+
4
DTR2
RX-
RX-
5
GND
GND
GND
6
DSR2
RTS-
NC
7
RTS2
RTS+
NC
8
CTS2
CTS+
NC
9
RI2
CTS-
NC