Advantech AIMB-542 Series User Manual page 42

11. System panel connector (20-1 pin PANEL)
This connector supports several chassis-mounted functions.
System Panel connector
The sytem panel connector is color-coded for easy connection. Refer to the
connector description below for details.
• System power LED (2-pin PLED)
This 2-pin connector is for the system power LED. Connect the chassis
power LED cable to this connector. The system power LED lights up when
you turn on the system power, and blinks when the system is in sleep mode.
• System warning speaker (4-pin SPEAKER)
This 4-pin connector is for the chassis-mounted system warning speaker. The
speaker allows you to hear system beeps and warnings.
• Hard disk drive activity (2-pin IDE_LED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity
LED cable to this connector. The IDE LED lights up or flashes when data is
read from or written to the HDD.
• System Management Interrupt Lead (2-pin SMI)
This 2-pin connector allows you to manually place the system into a
suspended mode, or "green" mode, where system activity is instantly
decreased to save power and to expand the life of certain system
components. Attach the chassis-mounted suspend switch to this connector.
• Power/Soft-off button (2-pin PWRSW)
This connector is for the system power button. Pressing the power button
turns the system ON or puts the system in SLEEP or SOFT-OFF mode
depending on the BIOS settings. Pressing the power switch for more than
four seconds while the system is ON turns the system OFF.
• Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system
reboot without turning off the system power.
1-32
PLED
PANEL
IDE_LED
SMI PWRSW
Requires an ATX power supply.
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Chapter 1: Product introduction
SPEAKER
RESET