Dahua NVR21-4KS3 Series User Manual page 7

● Install the Device on a stable surface to prevent it from falling.
● The power supply must conform to the requirements of ES1 in IEC 62368-1 standard and be no
higher than PS2. Please note that the power supply requirements are subject to the device label.
● The device is a class I electrical appliance. Make sure that the power supply of the Device is
connected to a power socket with protective earthing.
● Use power cords that conform to your local requirements, and are rated specifications.
● Before connecting the power supply, make sure the input voltage matches the power
requirements of the Device.
● When installing the Device, make sure that the power plug and appliance coupler can be easily
reached to cut off power.
● Install the Device near a power socket for emergency disconnect.
● It is prohibited for non-professionals and unauthorized personnel to open the Device casing.
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User's Manual