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.

P4S8X

IEEE1394_2

Ground Ground TPA2+ TPA2- TPB2+ TPB2- Ground +12V

P4S8X 1394 Headers

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.

CHASSIS

GND

P4S8X

Chassis Signal

+5VSB_MB

P4S8X Chassis Alarm Lead

36

Chapter 2: Hardware information