Power Supplies; Hot Spare Feature; Removing The Power Supply Unit Blank - Dell PowerEdge R530xd Owner's Manual

Installing the (optional) dual riser module
Installing the cooling shroud

Power supplies

Your system supports:
• Two 495 W, 750 W, or 1100 W AC power supply modules
• Two 750 W DC power supply modules
– When two identical power supplies are installed, the power supply configuration is redundant (1 +
1). In redundant mode, power is supplied to the system equally from both power supplies to
maximize efficiency.
– When only one power supply is installed, the power supply configuration is non-redundant (1 + 0).
Power is supplied to the system only by the single power supply.
– When configured in a 2+0 configuration, 1+1 redundancy will not be supported.
NOTE: If two power supplies are used, they must be of the same type and must have the same
maximum output power.
NOTE: For AC power supplies, use only power supplies with the Extended Power Performance (EPP)
label on the back. Mixing power supplies from earlier generations of Dell PowerEdge servers can
result in a power supply mismatch condition or failure to power on.

Hot Spare feature

Your system supports the Hot Spare feature that significantly reduces the power overhead associated
with power supply redundancy.
When the Hot Spare feature is enabled, one of the redundant PSUs is switched to the sleep state. The
active PSU supports 100% of the load, thus operating at higher efficiency. The PSU in the sleep state
monitors output voltage of the active PSU. If the output voltage of the active PSU drops, the PSU in the
sleep state returns to an active output state.
If having both PSUs active is more efficient than having one PSU in a sleep state, the active PSU can also
activate a sleeping PSU.
The default PSU settings are as follows:
• If the load on the active PSU is more than 50%, then the redundant PSU is switched to the active state.
• If the load on the active PSU falls below 20%, then the redundant PSU is switched to the sleep state.
You can configure the Hot Spare feature by using the iDRAC settings. For more information on iDRAC
settings, see the Integrated Dell Remote Access Controller User's Guide at dell.com/support/home.

Removing the power supply unit blank

If you are installing a second power supply unit, remove the power supply unit blank in the bay by
pulling the blank outward.
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