User's Manual

290 Power Management
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.
The CMC does not require the PSU units to be present in any specific PSU
slot positions when No Redundancy is configured.
NOTE: All PSUs in the chassis are Online if DPSE is disabled when in No
Redundancy mode. When DPSE is enabled all active PSUs in the chassis are listed
as Online and additional PSUs may be turned to Standby to increase the system's
power efficiency.
Figure 9-3. No Redundancy with three PSUs in the chassis
A PSU failure brings other PSUs out of Standby mode, as needed, to support
the chassis power allocations. If you have 4 PSUs, and require only three, then
in the event that one fails, the fourth PSU is brought online. A chassis can
have all 6 PSUs online.
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