User's Manual

Power Management 251
Figure 8-4. Power Supply Redundancy: 3+1 PSU Redundancy
No Redundancy Mode
The no redundancy mode is the factory default setting for 3 PSU configuration
and indicates that the chassis does not have any power redundancy
configured. In this configuration, the overall redundancy status of the chassis
always indicates No Redundancy.
Although Figure 8-5 illustrates the three PSUs present in the first three PSU
slots, CMC does not require the three PSU units to be present in any specific
PSU slot positions.
NOTE: All active PSU in the chassis are listed as Online and any additional PSU
may be turned off for increasing power efficiency and is marked as Standby if DPSE
is enabled. All PSUs in the chassis are listed as Online if DPSE is disabled in No
Redundancy mode.
Power
Supply
#1
Power
Supply
#2
Power
Supply
#3
Power
Supply
#4
Empty
Slot
#5
Empty
Slot
#6
Chassis DC Power Bus
Dual or Single Power Grid:
Power Supply Redundancy protects against failure
of a single power supply.