ASROCK IMB-184-PY User Manual page 17

COM Port Headers
(9-pin COM1: see p.8, No. 10)
(9-pin COM2: see p.8, No. 11)
(9-pin COM3: see p.8, No. 12)
(9-pin COM4: see p.8, No. 13)
This motherboard supports RS232/422/485 on COM1 port. Please refer to below
table for the pin definition. In addition, COM1 port (RS232/422/485) can be adjusted
in BIOS setup utility > Advanced Screen > Super IO Configuration. You may refer to
page 31 for details.
PIN
10
System Panel Header
(9-pin PANEL1)
(see p.8, No. 14)
Connect the power switch, reset switch and system status indicator on the
chassis to this header according to the pin assignments below. Note the
positive and negative pins before connecting the cables.
PWRBTN (Power Switch):
Connect to the power switch on the chassis front panel. You may configure
the way to turn off your system using the power switch.
RESET (Reset Switch):
Connect to the reset switch on the chassis front panel. Press the reset
switch to restart the computer if the computer freezes and fails to perform a
normal restart.
Signal
PIN
Name
10 +12V
9 +5V
COM1 Port Pin Definition
RS232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 +5V
+12V
GND
PWRBTN#
PLED-
PLED+
2
1
Signal Signal
PIN PIN
Name Name
8 CCTS# 6 DDSR#
7 RRTS# 5 GND
RS422
TX-
RX+
TX+
RX-
GND
N/A
N/A
N/A
+5V
+12V
This header accommodates
GND
several system front panel
RESET#
functions.
GND
HDLED-
HDLED+
1
17
Signal Signal
PIN PIN
Name Name
4 DDTR# 2 RRXD
3 TTXD 1 DDCD#
RS485
RTX-
N/A
RTX+
N/A
GND
N/A
N/A
N/A
+5V
+12V