ASROCK IMB-1237 User Manual page 17

* This motherboard supports RS232/422/485 on COM1, 2 ports. Please refer to the table below for the pin
definition. In addition, COM1, 2 ports (RS232/422/485) can be adjusted in BIOS setup utility > Advanced
Screen > Super IO Configuration. You may refer to our user manual for details.
** There are two LED next to the LAN2 port. Please refer to the table below for the LAN2 port LED indica-
tions.
Activity/Link LED
Status Description
Off No Link
Blinking Data Activity
On Link
*** There are two LED next to the LAN1 port. Please refer to the table below for the LAN1 port LED indi-
cations.
Activity/Link LED
Status
Off
Blinking
On
12
COM1, 2 Port Pin Definition
Pin RS232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 PWR
LAN2 Port LED Indications
Status
Off
Orange
Green
LAN1 Port LED Indications
Description Status
No Link Off
Data Activity Orange
Link Green
RS422 RS485
TX- RTX-
TX+ RTX+
RX+ N/A
RX- N/A
GND GND
N/A N/A
N/A N/A
N/A N/A
PWR PWR
SPEED LED
Description
10Mbps connection
100Mbps/1Gbps connection
2.5Gbps connection
SPEED LED
Description
10Mbps connection
100Mbps connection
1Gbp connection
ACT/LINK SPEED
LED LED
LAN2 Port
ACT/LINK SPEED
LED LED
LAN1 Port