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ASUS A7V333 motherboard user guide
41
22) 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.
A7V333
®
A7V333 Chassis Alarm Lead
CHASSIS
+5VSB_MB
Chassis Signal
GND