ADLINK Technology Matrix MXC-4000 Series User Manual page 31

4.1.2.3 for the selection of setting RS-232/422/485 by BIOS of
COM1 and COM2 ports.
System Description
Signal Name
PIN
RS-232
1 DCD#
2 RXD#
3 TXD#
4 DTR#
5 GND
6 DSR#
7 RTS#
8 CTS#
9 RI#
Matrix MXC-4000 Series
User's Manual
RS-422 RS-485
TXD422- 485DATA-
TXD422+ 485DATA+
RXD422+
RXD422-
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