DFI COM330-B - Manual (Page 43)

43
2
Hardware Installation
1
ON
4
5
1
ON
4
5
Power Connectors
Important
The system board consumes a minimal amount of power. Due to its low
power consumption, you only need a 120W to 150W power supply. Every
power supply has its minimum load of power. If you use a greater than
150W power supply, the power consumed by the system board may not
attain its minimum load causing instability to the entire system.
Use a power supply that complies with the ATX12V Power Supply Design Guide
Version 1.1. An ATX12V power supply unit has a standard 24-pin ATX main
power connector that must be inserted into the 24-pin connector. The 4-pin +12V
power connector enables the delivery of more +12VDC current to the COM ex-
press module board and carrier board’s PCI/ PCIe device.
The power connectors from the power supply unit are designed to fit the 24-pin
and 4-pin connectors in only one orientation. Make sure to find the proper orien-
tation before plugging the connectors.
1
3
2
4
Ground
Ground
+12V
+12V
13
1 12
24
+3.3VDC +3.3VDC Ground +5VDC +5VDC PWR_OK +5VSB +12VDC +12VDC +3.3VDC
+3.3VDC
-12VDC
PS_ON#
NC
+5VDC +5VDC +5VDC Ground
Ground Ground
Ground Ground Ground Ground