Fujitsu SPARC Enterprise T5120 Manuale di pianificazione del sito - Pagina 22

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Fujitsu SPARC Enterprise T5120 Manuale di pianificazione del sito

Electrical Power

Good practice is to connect each power supply to a separate circuit. This redundancy
enables the system to remain operational if one of the circuits fails. Consult your
local electrical codes for any additional requirements.
Related Information
"Ambient Temperature" on page 10

Ambient Temperature

An ambient temperature range of 21˚C (69.8˚F) to 23˚C (73.4˚F) is optimal for server
reliability. At 22˚C (71.6˚F) it is easy to maintain safe relative humidity levels.
Operating in this temperature range provides a buffer if the environmental support
systems fail.
Related Information
"Ambient Relative Humidity" on page 10

Ambient Relative Humidity

Ambient relative humidity levels between 45% and 50% are the most suitable for
data processing operations in order to:
Prevent corrosion
Provide an operating time buffer in the event of environmental control system
failure
Help avoid failures caused by the intermittent interference from static discharges
that occur when relative humidity is too low
Electrostatic discharge (ESD) is easily generated and less easily dissipated in areas
where the relative humidity is below 35%, and becomes critical when levels drop
below 30%.
10
SPARC Enterprise T5120 and T5220 Servers Site Planning Guide • July 2009