HP Aruba 8325 Series, Руководство по установке и началу работы

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Chapter 3 Installing the switch 31
Installation precautions
To avoid personal injury or product damage when installing your switch, read the installation precautions and
guidelines below.
• Do not mount the switch on a wall, on or under a table, or on or under any other horizontal surface.
• Mount devices installed in a rack or cabinet as low as possible. Put the heaviest devices at the
bottom and progressively lighter devices installed above.
• To prevent the rack or cabinet from becoming unstable and/or falling over, ensure that it is
adequately secured.
• Ensure the power source circuits are properly grounded. Then connect the switch to the power
source by using the power cord supplied with the switch.
• If your installation requires a different power cord than the one supplied with the switch and power
supply, be sure the cord is adequately sized for the switch’s current requirements. In addition, be
sure to use a power cord displaying the mark of the safety agency that defines the regulations for
power cords in your country. The mark is your assurance that the power cord can be used safely
with the switch and power supply.
• When installing the switch, the AC outlet should be near the switch and be easily accessible in
case the switch must be powered off.
• When powered by a DC power supply, the installation shall provide a readily accessible two-pole
disconnect device in the fixed installation.
• Do not install the switch in an environment where the operating ambient temperature exceeds its
specification. (See the
Environmental information.)
• Ensure that the switch does not overload the power circuits, wiring, and over-current protection. To
determine the possibility of overloading the supply circuits, add the ampere ratings of all devices
installed on the same circuit as the switch. Then compare the total with the rating limit for the
circuit. The maximum ampere ratings are usually printed on the devices near the AC power
connectors.
• Ensure that the air flow around the switch is not restricted. Leave at least 3 inches (7.6 cm) for
cooling. For air flow direction, determine whether your switch has front-to-back or back-to-front
fans and power supply units.
• All power supplies and fan assemblies installed in a 8325 switch must have the same cooling air
flow direction (FB or BF).
• Never insert or remove a power supply while the power cord is connected. Verify that the cord has
been disconnected from the power supply before installation or removal.
• When powered by a DC power supply, the switch must be installed in a restricted access location.
Only trained and qualified personnel should be allowed to install, replace, or service this
equipment.
• For switches with DC power supplies: Disconnect DC power from the power supply BEFORE
installing or removing the power supply. The power supply must NOT be connected to DC power
while it is being installed or removed. The switch power supplies are hot-swappable; that is, a
power supply that is disconnected from the power source can be installed or removed while the
switch is receiving power from another power supply installed in the other power supply slot.
• Always switch input power OFF before connecting and disconnecting the DC input to the unit. If
not turned off, there is a risk of injury or severe damage.
• When powered by a DC power supply, the product relies upon the installation to provide short-
circuit (overcurrent) protection. Ensure that the protective device is not greater than 20A for non-
PoE switches and not greater than 40A for PoE switches when using DC power.
• When installing DC power cords, ensure that appropriate strain relief and cable routing is in place
to prevent damage or loosening of connections during use.
• This power supply is declared to be supplied from earthed DC source. As extensive use, this power
supply shall be separated from primary circuits/building mains by double/reinforced insulation.