IBM 8265, Руководство по подготовке площадки, Страница: 19 / 164

Chapter 1. Choosing a Site for the IBM 8265
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Electrostatic Discharge (ESD)
The 8265 is a Class 2 product (RH not always > 20%, no specified minimum floor
surface conductivity, and no specified furniture resistance).
Ventilation Requirements
Three fan units draw air in through the front and center of the chassis and exhaust air
out the back. To ensure that the fans provide adequate ventilation, you must allow a
minimum of 15 cm (6 in.) between the rear of the 8265 and the nearest wall (or other
vertical surface).
The vent holes at the back of the switches are exhaust vents which serve to cool the
power supply bay. Do not block these vents.
AC Power Requirements
It is recommended to use a dedicated 15 ampere circuit (or an equivalent method of
providing this current) to supply power to the 8265 when operated at voltage between
90 and 130 volts ac for 110 volt range, and between 180 and 256 volts AC for 220 volt
range. This will ensure adequate power for a fully loaded 8265 configuration. This
circuit must be grounded to a safety protected ground (earth), NOT to a neutral
ground that carries current back to the transformer. Do not use an electrical conduit
pipe as your only means of grounding the 8265. There must be four ac power outlets
available within 2 m (6 ft) of the 8265 in the event that there are four power supplies
installed.
Caution: For use in Denmark, the end system using this power supply must
receive power from a separately dedicated socket outlet having a 16
Amp fuse in the installation, or the equipment in which the power
supply is to be used should be supplied with a relevant mains cord
intended for fixed installation.
Note: When you use a single circuit to power multiple load-sharing power supplies,
that single circuit may be required to deliver more than 15 Amps. This depends
on the number of installed power supplies and on the voltage configuration.
Load-sharing power supplies always draw power when inserted into the 8265.
There is no low power standby mode of operation.
8265 load-sharing power supplies are autosensing. Each power supply can
automatically sense (identify) the type of input AC voltage to which it is being
connected at the wall outlet. Compatible voltages are as follows:
•
Europe - 220 Volts to 240 Volts
•
North America - 110 Volts to 220 Volts
•
Japan - 100 Volts.