Asus P4S8X - Manual (Page 48)

36 Chapter 2: Hardware information
P4S8X
®
P4S8X 1394 Headers
IEEE1394_2
Ground Ground
TP
A2+
TP
A2-
TPB2- TPB2+ Ground
+12V
P4S8X
®
P4S8X Chassis Alarm Lead
CHASSIS
+5VSB_MB
Chassis Signal
GND
19. Chassis Open Alarm Lead (4-1 pin CHASSIS)
This lead is intended for a chassis designed to support intrusion detection.
The lead requires an external detection mechanism such as a chassis
intrusion monitor/sensor or microswitch. When any chassis component is
removed, the sensor is triggered and a high-level signal is sent to this lead to
record a chassis intrusion event. The event is then be processed by software
such as LDCM. When not using the chassis intrusion lead, place a jumper
cap over the pins to close the circuit. Removing the jumper cap will prevent
the system from booting up.
18. IEEE-1394 Header (8-pin IEEE1394_2) (Optional)
This header supports an IEEE-1394 serial connector cable set that mounts
to a standard expansion slot in the computer case. 1394-compliant internal
fixed disk drives may also be connected to these headers.