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ASUS CUSL2-M User’s Manual 41
3. HARDWARE SETUP
Connectors
3. H/W SETUP
25) ATX Power Supply Connector (20-pin block ATXPWR)
This connector connects to an ATX power supply. The plug from the power sup-
ply will only insert in one orientation because of the different hole sizes. Find the
proper orientation and push down firmly making sure that the pins are aligned.
IMPORTANT: Make sure that your ATX power supply (minimum recommended
wattage: 200 watts; 235W for a fully-configured system) can supply at least 20
amperes on the +5-volt lead and at least 10mA (750mA recommended) on the +5-
volt standby lead (+5VSB). Your system may become unstable/unreliable and may
experience difficulty in powering up if your power supply is inadequate. For Wake-
On-LAN support, your ATX power supply must supply at least 750mA +5VSB.
CUSL2-M
®
CUSL2-M ATX Power Connector
+3.3 Volts
-12.0 Volts
Ground
Power Supply On
Ground
Ground
Ground
-5.0 Volts
+5.0 Volts
+5.0 Volts
Power Good
+12.0 Volts
+3.3 Volts
+3.3 Volts
Ground
+5.0 Volts
Ground
+5.0 Volts
Ground
+5V Standby
26) Standard and Consumer Infrared Module Connector (10-1 pin IR_CON)
This connector supports an optional wireless transmitting and receiving infrared
module. This module mounts to a small opening on system cases that support
this feature. You must also configure the setting through UART2 Use Infrared
(see 4.4.2 I/O Device Configuration) to select whether UART2 is directed for
use with COM2 or IrDA. Use the five pins as shown in Back View and connect
a ribbon cable from the module to the motherboard’s SIR connector according
to the pin definitions. An optional consumer infrared (CIR) set connects to the
CIR and SIR connectors simultaneously for both wireless transmitting and re-
mote control functions through one external infrared module.
CUSL2-M
®
CUSL2-M Infrared Module Connector
Standard Infrared (SIR)
Front View Back View
+5V
IRTX
IRRX
(NC)
GND
SIR
+5V
IRRX
IRTX
(NC)
GND
(NC)
GND
CIRRX
CIR+5V
CIR