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Technical Reference

2.2.2.4.3 Power/Sleep LED

Pins 2 and 4 can be connected to a one- or two-color LED. Table 29 shows the

possible states for a one-color LED. Table 30 shows the possible states for a two-color

LED.

Table 29. States for a One-Color Power LED

LED State Description

Off Power off/sleeping

Steady Green Running

Table 30. States for a Two-Color Power LED

LED State Description

Off Power off

Steady Green Running

Steady Yellow Sleeping

NOTE

The colors listed in Table 29 and Table 30 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/Sleep LED Header

Pins 1 and 3 of this header duplicate the signals on pins 2 and 4 of the front panel

header.

Table 31. Alternate Front Panel Power/Sleep LED Header

Pin Signal Name Description

1 POWER_LED_MAIN [Out] Front panel LED (main color)

2 Key (no pin)

3 POWER_LED_ALT [Out] Front panel LED (alt color)

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