Power Supplies

Two power supplies power your system.

NOTE: Your system can operate using only one power supply, but with severely degraded performance.

Removing a Power Supply

NOTICE: The system requires one power supply for the system to operate normally. The system is in the redundant mode when two power supplies are installed and both power supplies are connected to an AC power source. Remove and replace only one power supply at a time in a system that is powered on. Operating the system with only one power supply installed and without a power supply blank installed for extended periods of time can cause the system to overheat.

NOTICE: If only one power supply is installed, it must be installed in power supply bay (1).

NOTICE: If you connect the system to a power source in the range of 120 to 220 VAC, and if two power supplies are installed, the second power supply serves as a redundant, hot-plug power source.

1If your system has a single power supply, remove power from the system and all attached peripherals. For a redundant system, you can leave the system running and proceed to the next step.

2Disconnect the power cable from the power source.

3Disconnect the power cable from the power supply.

4Depress the power supply latch and then pull the power supply lever to extract the power supply out of the chassis. See Figure 3-6.

5Pull the power supply straight out to clear the chassis.

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Installing System Components

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Dell R900 manual Power Supplies, Removing a Power Supply