DFI DT122-SB Manual - Manual (Page 27)

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27
Chapter 5 Ports and Connectors
Chapter 5
Chassis Intrusion Connector
The board supports the chassis intrusion detection function. Connect the chassis intrusion
sensor cable from the chassis to this connector. When the system’s power is on and a chassis
intrusion occurred, an alarm will sound. When the system’s power is off and a chassis intrusion
occurred, the alarm will sound only when the system restarts.
MyGuard Hardware Monitor
Install the “MyGuard Hardware Monitor” utility. By default, the chassis intrusion detection func-
tion is disabled. When enabled, a warning message will appear when the chassis is open. The
utility can also be configured so that a beeping alarm will sound when the chassis is open. Re-
fer to the “MyGuard Hardware Monitor” section in chapter 4 for more information.
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
1
2 Ground
Chassis
signal
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