System Description
21
Matrix MXC-4000 Series
User’s Manual
4.1.2.3 for the selection of setting RS-232/422/485 by BIOS of
COM1 and COM2 ports.
PIN
Signal Name
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#