Users Manual

2-28 Chapter 2: Hardware information
8. ATX power connectors (24-pin ATXPWR1, 8-pin ATX12V1)
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 8-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.
®
KFSN4-DRE Series ATX power connectors
8-pin
GND12V2 GND12V2 GND12V1 GND12V1
24-pin Power Connector
ATXPWR1
ATX12V1
+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
9. Power Supply SMBus connector (5-pin PSUSMB1)
This connector allows you to connect SMBus (System Management Bus) to
the power supply unit to read PSU information. Devices communicate with an
SMBus host and/or other SMBus devices using the SMBus interface.
®
KFSN4-DRE Series Power supply SMBus connector
PSUSMB1
+3.3V Remote Sense
GND
NC
I2C_7_DATA#
I2C_7_CLK#