ADLINK PXIe-3985 - Manual (Page 26)

14 Introduction
1.3.8 COM Port
A COM port on the front panel with D-sub 9P connectors supports
RS-232/RS-422/RS-485 by BIOS selection.
Figure 1-6: COM Port
Table 1-7: D-Sub 9p COM Port Signal Functions
Pin
Signal Name
RS-232 RS-422 RS-485
1 DCD# TXD422- 485DATA-
2 RXD TXD422+ 485DATA+
3 TXD RXD422+ N/S
4 DTR# RXD422- N/S
5 GND N/S N/S
6 DSR# N/S N/S
7 RTS# N/S N/S
8 CTS# N/S N/S
9 RI# N/S N/S
1 5
6 9