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Chapter 2: Motherboard information
8. COM Port headers (10-1 pin COM2~COM6)
These headers are for serial (COM) ports. Connect the serial port module
cable to any of these headers, then install the module to a slot opening at the
back of the system chassis.
NOTES:
• The COM module is purchased separately.
• COM1 also supports RS-232 / RS-422 / RS-485. See the table below and
section
3.3.5 SIO Configuration
for details.
A
A
B
C
D
E
B
C
D
PIN 1
PIN 1
DCD#
TXD GND RTS# Ring
Ring
RTS#
GND
TXD
DCD#
RXD DTR# DSR# CTS# (NC)
(NC)
CTS#
DSR#
DTR#
RXD
COM2
COM6
COM5
COM4
COM3
E
Pin
Signal
Signal
Pin
Pin
Signal
1
DCD# (422TXD-/485DATA-) 2
RXD (/)
3
TXD ()
4
DTR# (422RXD-)
5
GND
6
DSR#
7
RTS#
8
CTS#
9
RI/+5V/+12V
10
N.C.
