ADLINK PXI-3950 - Manual (Page 30)

16 I/O Connectors and Pin Assignments
PXI-3950
User’s Manual
2.2.6 COM Ports
The PXI-3950 provides two COM ports on the faceplate in D-
sub 9P connectors. These two serial ports are 16C550 UART
compatible and support RS-232/RS-422/RS-485 by jumper
selection. Please refer to section 2.4.2 for setting the COM
ports.
Figure 2-5: COM Ports & Pin Assignments
Signal Name
PIN
RS-232 RS-422 RS-485
1 DCD# TXD422- 485DATA-
2 RXD# TXD422+ 485DATA+
3 TXD# RXD422+
4 DTR# RXD422-
5 GND
6 DSR#
7 RTS#
8 CTS#
9 RI#