User's Manual

198 Power Management
Figure 8-1. Chassis With Six-PSU Configuration
Dynamic PSU Engagement
Dynamic PSU engagement is a configurable option that enables the CMC to
conserve power by powering-off unused PSUs and keeping them in standby
mode in case more power is required. This saves power by increasing the
utilization of the PSUs that remain active so that they are used more
efficiently.
When dynamic PSU engagement is enabled, the CMC enumerates all PSUs
in the chassis at initial power-up and when a new PSU is added to the chassis.
The CMC enumerates power based on how much power is required for a
given configuration. Factors that contribute to power enumeration include
the following:
• Module population
• Real-time power consumption
• The infrastructure’s static worst-case needs
• The number of PSUs in the chassis
PSUs