User's Manual

252 Power Management
Figure 8-5. No Redundancy
A PSU failure brings the other PSUs out of Standby mode, as needed, to
support the chassis power allocations. If you have 4 PSUs and one fails,
the fourth PSU is brought online. A chassis can have a maximum of 6 PSUs
online.
When you enable DPSE, the extra PSUs are placed in Standby mode to
increase efficiency and save power.
Power Budgeting for Hardware Modules
Figure 8-6 illustrates a chassis that contains a six-PSU configuration.
The PSUs are numbers 1-6, starting on the left-side of the enclosure.
Power
Supply
#1
Power
Supply
#2
Power
Supply
#3
Empty
Slot
#4
Empty
Slot
#5
Empty
Slot
#6
AC Power Grid #1
Chassis DC Power Bus
Single Power Grid:
No protection against grid or power supply failure