Installing And Removing Power Supplies; Installing A Power Supply - Cisco UCS X9508 Installation Manual

Installing and Removing Power Supplies

Installing and Removing Power Supplies

Note The power supplies are keyed to work only with their respective power expansion module (PEM), depending
on the chassis version.
When in installing and removing power supplies, make sure that the minimum number of power supplies are
active before replacing the other PSUs. For example, in a 3+3 grid power configuration, at least 3 PSUs must
be active before replacing the other 3 units one at a time per grid.
The PSUs are installed vertically along the side of the chassis.

Installing a Power Supply

The Cisco UCS X9508 AC PSU does not have a discrete power switch. It powers on immediately when it is
successfully connected to the power midplane. PSUs can be installed in any order, and if you are installing a
removed PSU, the PSU does not need to be installed in the same PSU bay that it originally occupied.
PSUs are hot swappable with a minimum population of two in the chassis to provide redundancy. PSUs are
interchangeable and none are reserved through the management software.
Cisco UCS X9508 Server Chassis Installation Guide
70
Installing and Removing Components