Stratus ftServer 2900 Series, Планирование и руководство по установке

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Electrical Power Planning 2-1
Chapter 2
Electrical Power Planning
2-
For information about planning appropriate AC electrical power for your system and its
peripheral components, see:

“Redundant Power Sources” on page 2-1

“AC Power and HVAC Service Requirements” on page 2-2

“Selecting a UPS Unit for ftServer Systems” on page 2-6

“Power Cord Summary” on page 2-7

“Grounding Requirements” on page 2-10
Related Topic

Chapter 5, “Rack Configuration Planning”
Redundant Power Sources
ftServer systems require at least two separate and independent AC power
sources—an
A-side power source and a B-side power source—that provide power to
the system’s power receptacles, labeled A and B, respectively. Either source must be
capable of continuing to provide power if power to the other source is lost.
The A-side power source provides power to the top CPU-I/O enclosure, to one-half of
a storage enclosure, and to components that do not require two sources of power, such
as tape-drive enclosures and a monitor. If you use an uninterruptible power
supply (UPS), the UPS is, in these standard, documented configurations, the A-side
power source.
The B-side power source provides power to the bottom CPU-I/O enclosure and to the
second half of a storage enclosure.
Optionally, a pair of PDUs supplies power to multiple systems and components in a
cabinet. The top PDU in the cabinet provides A-side power; that is, it powers one
CPU-I/O enclosure and one side of an external storage enclosure, and it is the only
source of power to tape drives. The bottom PDU provides B-side power; that is, it
provides power to the other CPU-I/O enclosure and to the other side of an external
storage enclosure.