·
Dust particles (diameter
≥
5
μ
m)
≤
3
×
10
4
Besides dusts, routers also have strict requirements on salt, acid and sulfide contents in the air in the equipment room.
These gases will speed the erosion and aging of metals and parts. The following table gives the limitations on the
harmful gases of SO2, H2S, NO2, NH3, and Cl2.
Gas
Average (mg/m
3
)
Maximum (mg/m
3
)
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.
2.2.5 System Grounding Requirements
A good grounding system is the basis for the stable and reliable operation of the RSR30-X and the key 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 properly as needed.
Safety Grounding
The equipment using AC power supply must be grounded by using the yellow/green safety grounding cable. Otherwise,
when the insulating resistance decreases the power supply and the enclosure in the equipment, electric shock may
occur.
The building installation shall provide a means for connection to protective earth, and the equipment is to be
connected to that means.
EMC Grounding
The ground required for EMC design includes shielding ground, filter ground, noise and interference suppression, and
level reference. All the above constitute the comprehensive grounding requirements. The grounding resistance should
be less than 1Ω. One grounding point is reserved at the rear panel, as shown in the following figure.
Figure 2-1 Grounding Point of RSR30-X
