Installation Manual
7. Appendix
67
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Apart from dust, the router equipment room has the strict requirements for salts, acids, and
sulfides contained in the air, because these harmful gases speed up the eroding of metals and
the aging of some components.
We should prevent the harmful gases, such as SO2, H2S, NO2, NH3 and Cl2, from entering the
equipment room. The specific limited values are as shown in the following table.
Appendix Table 7.3.1.1-2 Limitations for the harmful gases in the equipment room
Gas
Max. (mg/m
3
)
SO
2
0.2
H
2
S
0.006
NH
3
0.05
Cl
2
0.01
4.7.3.
Anti-Interference Requirement
The various interference sources no matter from the exterior of the router or from the interior
router affect the router through capacitance coupling, inductance coupling, electromagnetic
radiation, public impedance (including grounding system) coupling, and lead (such as power
cables, signal lines and output lines). Therefore, pay attention to the following items:
Take valid anti-grid disturbance measures for the power system.
The working place of the router had better not be used with the grounding
settings of power devices or lightning protection grounding settings and the
distance between them had better be as long as possible.
Be away from the strong power radio transmitters, radar transmitter, and high
frequency high-current equipment; take electromagnetic shielding methods
when necessary.
5.7.3.
Grounding Requirement
The well grounding system is the basis for the router to run stably and reliably, and the
important guarantee for lightning protection, anti-interference, and anti-static of the router.
The user should provide the well grounding system for the router. The resistance between the
router chassis and the ground should be smaller than 1 ohm.
