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2.2.2.4.2
Reset Switch Header
Pins 5 and 7 can be connected to a momentary single pole, single throw (SPST) type
switch that is normally open. When the switch is closed, the board resets and runs the
POST.
2.2.2.4.3
Power/Sleep LED Header
Pins 2 and 4 can be connected to a one- or two-color LED. Table 23 shows the
possible states for a one-color LED. Table 24 shows the possible states for a two-color
LED.
Table 23. States for a One-Color Power LED
LED State
Off
Steady Green
Table 24. States for a Two-Color Power LED
LED State
Off
Steady Green
Steady Yellow
NOTE
The colors listed in Table 23 and Table 24 are suggested colors only. Actual LED
colors are chassis-specific.
2.2.2.4.4
Power Switch Header
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The
switch must pull the SW_ON# pin to ground for at least 50 ms to signal the power
supply to switch on or off. (The time requirement is due to internal debounce circuitry
on the board.) At least two seconds must pass before the power supply will recognize
another on/off signal.
2.2.2.5
Alternate Front Panel Power LED Header
Pins 1 and 3 of this header duplicate the signals on pins 2 and 4 of the front panel
header.
Table 25. Alternate Front Panel Power LED Header
Pin
Signal Name
1
HDR_BLNK_GRN
2
Not connected
3
HDR_BLNK_YEL
Description
Power off/sleeping
Running
Description
Power off
Running
Sleeping
In/Out
Out
Out
Technical Reference
Description
Front panel green LED
Front panel yellow LED
51
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