Asus P5V900 Manual page 63

10. Chassis intrusion connector (4-1 pin CHASSIS)
This connector is for a chassis-mounted intrusion detection sensor
or switch. Connect one end of the chassis intrusion sensor or switch
cable to this connector. The chassis intrusion sensor or switch sends
a high-level signal to this connector when a chassis component
is removed or replaced. The signal is then generated as a chassis
intrusion event.
By default, the pins labeled "Chassis Signal" and "Ground" are shorted
with a jumper cap. Remove the jumper cap only when you intend to
use the chassis intrusion detection feature.
Intrusion Connector
11. Serial port connector (10-1 pin COM2)
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.
R
COM Port Connector
ASUS V-Series P5V900
R
COM2
PIN 1
CHASSIS
(Default)
4-11