Power Supply Unit for WD PR4100

Good day.
In specification written that WD PR4100 has two plugs for power supply units.
Does in mean that it’s possible to buy additional (second) power supply unit and use both simultaneously (at the same time)?
If “yes” that this will make work more reliable.

Thanks in advance

Hello YuriS,

Second power plug of power supply, would be a backup of first plug i.e. if first plug is not working or get damaged then power adapter will connect to a second power plug.