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-
5GND
6DSR#
7RTS#
8CTS#
9RI#
