Four power supply slots support the installation of up to four 1,600 watt power supplies. The Extreme 9920 accommodates AC power supplies, DC power supplies, or a mixture of both. Each power supply is self enclosed with an integrated cooling fan that vents directly to the rear of the Extreme 9920, to provide front-to-back cooling airflow.
The following figure shows the rear of the chassis with four power supply modules. The power supply slots are situated in the four contiguous slots starting from the left-hand side to the bottom and the rear of the chassis. They are numbered PSU 1 through PSU 4. Power supplies are hot swappable as long as there are enough power supplies remaining to provide the necessary amount of power. Power needs vary depending on the number of installed interface modules.
Note
Do not remove the cover from the fifth, or last, power supply slot on the far right to the bottom and the rear of the chassis. The slot has no function and system airflow is disrupted if the cover is removed, which affects the cooling of the internal components.
A DC power cord is provided with the DC power supply.
