The Cisco Catalyst 9800-40 Wireless Controller supports the following small form-factor pluggable (SFP) and CPAK optical transceiver types:

For more information about the supported SFP+ transceivers, see the datasheet at https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9800-series-wireless-controllers/nb-06-cat9800-wirel-cont-data-sheet-ctp-en.html

The Cisco Catalyst 9800-40 Wireless Controller supports AC power supply. The modular chassis configurations support the installation of two power supplies for redundancy. When an external power supply fails or is removed, the other power supply provides power requirements for the chassis. This allows you to hot-swap the power supply without impacting the functionality of the controller.

Note	A Cisco Catalyst 9800-40 Wireless Controller can support two AC power supplies.

The power supplies are used in a 1 + 1 redundant configuration. There is no input switch on the faceplate of the power supplies. A power supply is switched from Standby to On by way of a system chassis power switch.

The following table lists the power supplies that you can order:

Note	Platform related information can be obtained through a programmable interface using openconfig-platform model. However, power auditing per component is not supported.

Caution

The chassis has a front-to-rear airflow. All the power supplies and fan modules in the chassis must use the same airflow direction or an error will occur with possible overheating and shut down of the controller. If you power up the controller with more than one airflow direction, you must power down the controller and replace the modules with the wrong airflow direction before powering up the controller.