Technical Reference
51
2.8 Connectors
CAUTION
On the Desktop Board D845PEBT2, only the following connectors have overcurrent protection:
• Back panel USB, IEEE 1394a-2000, and PS/2
• Front panel USB and IEEE 1394a-2000
The other internal connectors of the Desktop Board D845PEBT2 are not overcurrent protected
and should connect only to devices inside the computer’s chassis, such as fans and internal
peripherals. Do not use these connectors to power devices external to the computer’s chassis. A
fault in the load presented by the external devices could cause damage to the computer, the
interconnecting cable, and the external devices themselves.
The connectors are described on the following pages and are divided into these groups:
• Back panel I/O connectors (see page 52):
PS/2 keyboard and mouse
IEEE 1394a-2000 (optional)
USB
Parallel port
Serial port A
Digital S/PDIF (optional)
Optical S/PDIF (optional)
Audio
LAN
• Internal I/O connectors (see page 56):
ATAPI-style CD-ROM
Fans
Power
PCI add-in boards
AGP add-in board
IDE
Diskette drive
SCSI LED
SATA/SATA RAID (optional)
IDE RAID (optional)
CNR (optional)
• External I/O connectors (see page 68):
Front panel audio
Front panel IEEE 1394a-2000 (optional)
Front panel USB
Front panel (power, sleep, and message-waiting LED; power switch; hard drive activity
LED; and reset switch)
Auxiliary front panel power, sleep, and message-waiting LED
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