Technical Reference
43
2.8 Connectors
CAUTION
Only the back panel USB, front panel USB, VGA, and PS/2 connectors have overcurrent
protection. The Desktop Boards’ internal connectors 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.
This section describes the board’s connectors. The connectors can be divided into these groups:
• Back panel I/O connectors (see page 44)
PS/2 keyboard and mouse
USB (four ports)
Parallel port
Serial port A
LAN (optional)
Audio (line out, line in, and mic in)
• Internal I/O connectors (see page 45)
Audio (ATAPI CD-ROM and front panel audio)
Fans
Power
Add-in boards (PCI)
IDE
Diskette drive
Chassis intrusion
• External I/O connectors (see page 50)
Serial Port B (optional)
Auxiliary front panel power/sleep/message-waiting LED
Front panel (power/sleep/message-waiting LED, power switch, hard drive activity LED,
reset switch, and auxiliary front panel power LED)
Front panel USB (one connector for two ports)
✏
NOTE
When installing the board in a microATX chassis, make sure that peripheral devices are installed
at least 1.5 inches above the main power connector, the diskette drive connector, the IDE
connector, and the DIMM sockets.
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