Hardware Installation and Reference Guide Preparation before Installation
Substance
Concentration Limit (particles/m3)
Dust particles (diameter
≥
0.5
μ
m)
≤
3.5
×
10
6
Dust particles (diameter
≥
5
μ
m)
≤
3
×
10
4
Apart from dust, the salt, acid and sulfide in the air in the equipment room must also meet strict requirements; as such
poisonous substances may accelerate the corrosion of the metal and the aging of some parts. The equipment room
should be protected from the intrusion of harmful gases (for example, SO
2
, H
2
S, NO
2
and Cl
2
), whose requirements are
listed in the following table.
Table 2-3 Requirements for Harmful Gases in the Equipment Room
Gas
Average (mg/m3)
Maximum (mg/m3)
SO
2
0.3
1.0
H
2
S
0.1
0.5
NO
2
0.5
1.0
Cl
2
0.1
0.3
The
Average
refers to the average limit of harmful gas in one week. The
Maximum
value is the upper limit of the
harmful gas measured in one week for up to 30 minutes every day.
2.2.4 EMI
During applications, the switch may be subject to external interferences that affect the device through conduction manners
such as capacitance coupling, inductive coupling, electromagnetic wave emission, common impedance (including
grounding systems), and wires (power cables, signal cables and outgoing transmission cables). For that purpose, note
that:
For the AC power supply system TN, single-phase three-core power socket with protective earthing conductors (PE)
should be adopted to effectively filter out interference from the power grid through the filtering circuit.
The switch should be located at places free from large power radio launch pad, radar launch pad, and
high-frequency large-current devices.
If necessary, electromagnetic shielding should be adopted. For example, use interface cables to shield cables.
Interface cables should be laid inside the equipment room. Outdoor cabling is prohibited, avoiding damages to
device signal interfaces caused by over-voltage or over-current of lightning.
2.2.5 System Grounding Requirements
A good grounding system is the basis for the stable and reliable operation of the XS-S1960-24GT4SFP-Hseries. It is the
chief condition to prevent lightning stroke and resist interference. Please carefully check the grounding conditions on the
installation site according to the grounding requirements, and perform grounding operations properly as required.
Effective grounding of the switch is an important guarantee for lightning protection and interference resistance.
Therefore, connect the grounding line of the switch properly.
