2.Serial connector (9-pin COM1 )

This 9-pin connector connects to the Serial COM1 bracket. Connect the COM1 cable to this connector and install the bracket on an available slot in the rear panel of the chassis.

P4S8L

COM1

P4S8L Serial COM1 Bracket

3.ATX power connectors (20-pin ATXPWR1, 4-pin ATX12V1)

These connectors connect to an ATX 12V power supply. The plugs from the power supply are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.

ATXPWR1

+3.3VDC

+3.3VDC

GND

+5.0VDC

GND

+5.0VDC

GND

PWR_OK

+5VSB

+12.0VDC

P4S8L

 

 

 

 

 

 

 

 

 

+3.3VDC

-12.0VDC

GND

PS_ON#

GND

GND

GND

-5.0VDC

+5.0VDC

+5.0VDC

ATX12V1

P4S8L Floppy ATX Power Connectors

GND GND

+12V DC +12V DC

If you will need to replace the power supply in the future, make sure that your new ATX 12V power supply can provide 8A on the +12V lead and at least 1A on the +5-volt standby lead (+5VSB). The minimum recommended wattage is 230W, or 300W for a fully configured system. The system may become unstable and may experience difficulty powering up if the power supply is inadequate.

ASUS Book Size Barebone System

5-13