Home > Data Protection > PowerProtect Data Manager Appliance > Dell PowerProtect Data Manager Appliance Configuration Best Practices > Connect power cables
Ensure that the rack that contains PowerProtect Data Manager Appliance contains two PDUs connected to different power sources for redundancy.
Redundant power sources allow one AC source to fail or be serviced without affecting appliance operation. On PowerProtect Data Manager Appliance, connect PSU 0 to one AC source and PSU 1 to the other AC source.
Note: We are only connecting the power cables to the appliance. To power on the appliance, see Installation overview.