System Overview 1-25
One to three power supplies provide power to components in the system box.
The system supports redundant power configurations to ensure continued
system operation if a power supply fails. See Chapter 6 for power supply
configurations.
When more than one power supply is installed, the supplies share the load. The
power supplies select line voltage automatically (120V or 240V and 50 Hz or
60 Hz).
Power Supply LEDs
Each power supply has two green LEDs that indicate the state of power to the
system.
➊ POK (Power OK) Indicates that the power supply is providing power. The
POK LED is on when the system is running. When the
system power is on and a POK LED is off, that supply is
not contributing to powering the system.
➋ +5 V Auxiliary
Indicates that AC power is flowing from the wall outlet.
As long as the power supply cord is plugged into the wall
outlet, the +5V Aux LED is always on, even when the
system power is off.
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