H3C S5120V3-EI Series, Руководство пользователя

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1-4
Item Requirements
corresponding network interface.
•
Keep the signal cables far from power cords and lightning rod down
conductors.
•
As a best practice, route power cords indoors. If an AC power cord
is routed from outdoors, connect the AC power cord first to a power
lightning arrester before leading it to the AC power port on the
switch. Make sure the power lightning arrester has a nominal
discharge current and the total length of the power cord from the
power lighting arrester to the power port on the switch is less than 5
m (16.40 ft).
•
Ground the switch, rack, independent power supplies, and lightning
arresters separately.
•
You must ground optical fibers with reinforcing metal stiffener from
outdoors on an optical distribution frame (ODF) or fiber splice
enclosure.
Cable routing
CAUTION:
Do not run an Ethernet cable and power cord in parallel.
•
Route different types of cables separately.
•
Keep power cords a minimum of 5 cm (1.97 in) away from other
cables.
ESD prevention
•
Ground the switch correctly.
•
To avoid ESD damage to the device or components, always wear an
ESD wrist strap when you install or remove the device or
components.
•
Make sure the wrist strap has good skin contact and is reliably
grounded.
Cleanliness
•
For more information, see " Cleanliness ."
Corrosive gas prevention
The installation site must be free from corrosive gases such as acid
gases and alkaline gases. For more information, see "
Corrosive gas
limit ."
EMI
•
If AC power is used, use a single-phase three-wire power receptacle
with protection earth (PE) to filter interference from the power grid.
•
Keep the device far away from radio transmitting stations, radar
stations, and high-frequency devices.
•
Use electromagnetic shielding, for example, shielded interface
cables, when necessary.
Cleanliness
Dust buildup on the chassis might cause electrostatic adsorption and dust corrosion, resulting in
poor contact of metal connectors and contact points. This might shorten the device's lifetime and
even cause device failure in the worst case.
Table1-3 describes the switch requirement for
cleanliness.
Table1-3 Switch requirement for cleanliness
Substance Particle diameter Concentration limit
Dust particles
≥ 0.5 µm ≤ 1.8 × 10
7
particles/m
3
To maintain cleanliness in the equipment room, follow these guidelines:
•
Keep the equipment room away from pollution sources. Do not smoke, eat, or drink in the
equipment room.