08
Gigabit L2 Managed Switch
Installation
changes and corrosions. Too high temperature may accelerate aging of the
insulation materials and can thus significantly shorten the service life of the device.
For normal temperature and humidity of the device, please check the following
table.
Environment Temperature Humidity
Operating
0
℃
to 40
℃
10% to 90%RH Non-condensing
Storage
-40
℃
to 70
℃
5% to 90%RH Non-condensing
Clearness
The dust accumulated on the switch can be absorbed by static electricity and result
in poor contact of metal contact points. Some measures have been taken for the
device to prevent static electricity, but too strong static electricity can cause deadly
damage to the electronic elements on the internal circuit board. To avoid the effect
of static electricity on the operation of the switch, please attach much importance
to the following items:
■
Dust the device regularly, and keep the indoor air clean.
■
Keep the device well grounded and ensure static electricity has been transferred.
Electromagnetic Interference
Electronic elements including capacitance and inductance on the device can be
affected by external interferences, such as conducted emission by capacitance
coupling, inductance coupling, and impedance coupling. To decrease the
interferences, please make sure to take the following measures:
■
Use the power supply that can effectively filter interference from the power grid.
■
Keep the device far from high-frequency, strong-current devices, such as radio
transmitting station.
■
Use electromagnetic shielding when necessary.
Lightening Protection
Extremely high voltage currents can be produced instantly when lightning occurs
and the air in the electric discharge path can be instantly heated up to
20,000℃
. As
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