Asus H81-M2 User Manual page 25

7. USB 2.0 connectors (10-1 pin USB910, USB1112)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specifications and supports up to
480Mbps connection speed.
H81M2
H81M2 USB2.0 connectors
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
8. 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.
H81M2
H81M2 Serial port connectors
The COM module is purchased separately.
ASUS H81M2
USB1112 USB910
PIN 1 PIN 1
COM
PIN 1
1-17