Run the display device [ slot slot-id ] command to view information about the device. If the device name displayed in the first line of the command output contains AC, the device is an AC model. If the device name contains DC, the device is a DC model. For details about the power supply configuration of the device, see "Power Supply" in the Hardware Description - Chassis.
<HUAWEI> display device
S5720-28X-PWR-SI-AC's Device status:
Slot Sub Type Online Power Register Status Role
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0 - S5720-28X-PWR-SI Present PowerOn Registered Normal Master