Fujitsu PRIMEPOWER900 Manual page 71

4.7 Power Supply Unit
• Dual power feed option
Dual power feed option is used to receive AC power for the main unit from two
separate power systems. This option is mounted in the main unit.
Connecting AC power to the main unit form two separate power systems provides
redundancy. This allows the system to operate continuously, even if a power failure
occurs in one of the input power systems.
When planning the installation of a UPS, note that a UPS needs to be installed for
each power line.
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