User Manual

2-26 Chapter 2: Hardware information
8. ATX power connectors (24-pin ATXPWR1, 4-pin ATX12V)
These connectors are for an ATX power supply plugs. The power supply
plugs are designed to t these connectors in only one orientation. Find the
proper orientation and push down rmly until the connectors completely t.
• Do not forget to connect the 4-pin ATX +12 V power plug; otherwise, the
system will not boot.
• Use of a PSU with a higher power output is recommended when
conguring a system with more power-consuming devices. The system
may become unstable or may not boot up if the power is inadequate.
• Make sure that your power supply unit (PSU) can provide at least the
minimum power required by your system. See the table below for details.
9. Power Supply SMBus connector (5-pin PSUSMB1)
This connector allows you to connect SMBus (System Management Bus)
devices to the power supply unit. Devices communicate with an SMBus host
and/or other SMBus devices using the SMBus interface.
M2N-LR/SATA
®
M2N-LR/SATA ATX Power Connector
+3 Volts +3 Volts Ground +5 Volts +5 Volts Ground Ground Power OK +5V Standby +12 Volts
-5 Volts
+5 Volts +3 Volts
-12 Volts
Ground Ground Ground
PSON#
Ground
+5 Volts
+12 Volts +3 Volts
+5 Volts
Ground
ATXPWR1
ATX12V1
+12V DC
GND
+12V DC
GND
M2N-LR/SATA
®
M2N-LR/SATA Power Supply SMBus Connector
PSUSMB1
+3.3V Remote Sense
GND
NC
PSU_I2CDATA
PSU_I2CCLK