Emi Prevention; Grounding Requirements; Installation Tools And Meters - H3C LSQM1WCMB0 Installation Manual

In addition, the equipment room should meet the rigorous limits on salts, acids and
sulfides to eliminate corrosion and premature aging of some parts. There are also limits
on harmful gases in the equipment room (see Table 4
Table 4 Limits on harmful gases in the equipment room
Gas
SO
2
H S
2
NH
3
Cl
2

EMI prevention

All interference sources, from the outside or inside of the switch and application system,
adversely affect the access controller module in the conduction patterns of
capacitance coupling, inductance coupling, electromagnetic wave radiation, and
common impedance (including grounding system) coupling, and cable conduction
(including power cables, signal cables and output cables).
To prevent interference:

Take effective measures against interference from the power grid.

Keep the protection ground (PGND) of the switch as far away as possible from the
grounding device or lightning protection grounding device of the power supply
equipment.

Keep the switch far away from high-power radio launchers, radars, and equipment
with high-frequency and high current.

Use electromagnetic shielding when necessary.

Grounding requirements

A good grounding system is essential for lightning protection, interference prevention
and ESD prevention to ensure the stable and reliable operation of the switch and the
access controller module.

Installation tools and meters

When installing the access controller module, you may need the tools listed in Table 5
These installation tools and meters are not shipped with the LSQM1WCMB0.
Limit (mg/m )
3
0.2
0.006
0.05
0.01
11