20 PCA-6144V User's Manual
RS-232 connection (COM1)
Different devices implement the RS-232 standard in different
ways. If you are having problems with a serial device, be sure to
check the pin assignments for the connector. The following table
shows the pin assignments for the card's RS-232 port:
RS-232 connector pin assignments
Pin
Signal
1
DCD
2
RX
3
TX
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
RS-232/485 connection (COM2)
COM2 is an RS-232/485 serial port. The specific port type is
determined by jumper settings J23 - J27, as detailed in Chapter 1.
The following table shows the pin assignments for COM2.
RS-232/485 connector pin assignments
Pin
RS-232
RS-485
1
DCD
DATA-
2
RX
DATA+
3
TX
-
4
DTR
-
5
GND
GND
6
DSR
-
7
RTS
-
8
CTS
-
9
RI
-
1
5
6
9
COM1
1
5
6
9
9 7 5 3 1
10 8 6 4 2
DB-9 COM2 adapter CN6 pin-header