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B
I
NTELLIGENT
P
OWER
S
UBSYSTEM
The Switch 4007 provides a fault-tolerant, intelligent
power supply subsystem. The Switch 4007 chassis
can contain two power supplies.
The Switch 4007 intelligent power subsystem
supports:
■
930-watt AC load-sharing power supply (Model
Number: 3CB9EP9) with AC input power
■
High power availability
■
Controller-based power verification features that
are designed to ensure optimal performance
This appendix contains the following topics:
■
Intelligent Power Subsystem Features
■
Intelligent Power Subsystem Features
■
Power Management
■
Power Supply Modes
■
Power Availability and Power Supply Capacity
Intelligent Power Subsystem Features
Table 11 lists the intelligent power management
features.
Table 11
Intelligent Power Subsystem Features
Feature Description
Load-sharing power
supplies
Provides evenly distributed power
consumption among all installed power
supplies. Switch 4007 activity is not
disrupted if a power supply fails
because there is no changeover (and
hence, no changeover interval).
Front and rear
loading accessibility
Provides easy access for upgrades. As
your power needs increase over time, it
is easy to upgrade by adding a power
supply into the rear of the 7-slot
chassis.
Dedicated power
supply bay cooling
Cools the power supply bay. Vent holes
and fan trays reduce the possibility that
an overheat condition in the power
supply bay may cause or contribute to a
failure of the chassis or its modules.
This feature works with other switch
features to maintain normal chassis
internal operating temperature.
High power capacity Determines the current power limit.
The power mode and the amount of
power available determine the current
power limit. The actual power that is
delivered depends on whether you are
running in non-fault-tolerant mode or
in fault-tolerant mode.