DFI DT122-HR Manual - Manual (Page 30)

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30
Chapter 5 Ports and Connectors
Chapter 5
Power Connectors
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 processor’s Voltage Regulator Module (VRM).
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 orientation before plugging
the connectors.
Important:
Insufficient power supplied to the system may result in instability or the add-in boards
and peripherals not functioning properly. Calculating the system’s approximate power
usage is important to ensure that the power supply meets the system’s consumption
requirements.
1
ATX power
Ground
1
3
2
4
Ground
+12V
+12V
13
1 12
24
+3.3VDC +3.3VDC COM +5VDC COM +5VDC COM PWR_OK +5VSB +12VDC +12VDC +3.3VDC
+3.3VDC
-12VDC
COM
PS_ON#
COM COM COM
NC
+5VDC +5VDC +5VDC
COM
Front Panel Connectors
HDD-LED - HDD LED
This LED will light when the hard drive is being accessed.
RESET SW - Reset Switch
This switch allows you to reboot without having to power off the system.
PWR-BTN - Power Switch
This switch is used to power on or off the system.
PWR-LED - Power/Standby LED
When the system’s power is on, this LED will light. When the system is in the S1 (POS - Power
On Suspend) state, it will blink every second. When the system is in the S3 (STR - Suspend To
RAM) state, it will blink every 4 seconds.
Pin Pin Assignment Pin Pin Assignment
HDD-LED 3 HDD Power PWR-LED 2 LED Power
5 Signal 4 LED Power
RESET SW 7 Ground 6 Signal
9 RST Signal PWR-BTN 8 Ground
11 N.C. 10 Signal
HDD-LED
RESET-SW
PWR-LED
PWR-BTN
12 11
2 1