The com module is purchased separately, H81m-d plus serial port (com) connector, H81m-d plus usb3.0 front panel connector – Asus H81M-D PLUS User Manual
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Chapter 1: Product introduction
10. Serial port connector (10-1 pin COM)
This connector is for a serial (COM) port. Connect the serial port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
The COM module is purchased separately.
H81M-D PLUS
H81M-D PLUS Serial port (COM) connector
PIN 1
COM
DC
D
DX
T
DN
G
ST
R
IR
DX
R
RT
D
RS
D
ST
C
11. USB 3.0 connector (20-1 pin USB3_E12)*
These connectors allow you to connect a USB 3.0 module for additional USB 3.0 front
or rear panel ports. With an installed USB 3.0 module, you can enjoy all the benefits of
USB 3.0 including faster data transfer speeds of up to 5Gbps, faster charging time for
USB-chargeable devices, optimized power efficiency and backward compatibility with
USB 2.0.
*H81M-D PLUS model only.
H81M-D PLUS
H81M-D PLUS USB3.0 front panel connector
USB3_E12
USB3+5V IntA_P1_SSRX- IntA_P1_SSRX+ GND IntA_P1_SSTX- IntA_P1_SSTX+ GND IntA_P1_D- IntA_P1_D+ GND
PIN 1
USB3+5V
IntA_P2_SSRX- IntA_P2_SSRX+
GND
IntA_P2_SSTX- IntA_P2_SSTX+
GND
IntA_P2_D- IntA_P2_D+