If your device does not come with an installed internal power supply, you can install one or two power supplies. All installed power supplies must have the same airflow direction (front-to-back or back-to-front) and must also match the airflow direction of the fan modules.
This switch supports 800 W AC or DC power supply units.
If the power supply module has a red tab, the airflow is front-to-back.
If the power supply module has a blue tab, the airflow is back-to-front.
The following internal power supplies (PSUs) are available for the switch:
Part numbers XN-ACPWR-800W-F and XN-DCPWR-550W-FB provide front-to-back airflow for cooling, and AC and DC power, respectively.
Part numbers XN-DCPWR-800W-F and XN-DCPWR-800W-R provide back-to-front airflow for cooling, and AC and DC power, respectively.
For installation instructions, see Replace Internal Power Supplies.