·
Hardware Installation and Reference Guide Preparing for Installation
Besides, the contents of salts, acids and sulfides in the air are also strictly limited for the equipment room. These
substances can accelerate metal corrosion and the aging of some parts. Table 2-3 describes the limit of some hazardous
gases such as SO
2
, H
2
S, NO
2
and Cl
2
in the equipment room.
Table 2-2
Gas
Average (mg/m
3
)
Maximum (mg/m
3
)
SO
2
0.2
1.5
H
2
S
0.006
0.03
NO
2
0.04
0.15
NH
3
0.05
0.15
Cl
2
0.01
0.3
2.5 Power Supply
PoE injector: IEEE 802.3at/af compliant
DC power adapter:
Input voltage: 12V
Rated current: 1.0A
Technical Specifications of the DC Connector
Inner Diameter
Outer Diameter
Insertion Depth
Polarity
2.1mm
5.5mm
10mm
Inner pole: positive
Outer pole: negative
The DC input power should be greater than the power actually consumed by the system. The input power for the
RG-AP180 should not be lower than 10W.
Use DC power adapters with specifications recommended by Ruijie.
Please use Ruijie certified PoE injectors.
2.6 EMI Consideration
Various interference sources, from either outside or inside the equipment or application system, affect the system in the
conductive ways such as capacitive coupling, inductive coupling, and electromagnetic radiation. There are two types of
electromagnetic interferences: radiated interference and conducted interference, depending on the type of the
propagation path. When the energy, often RF energy, from a component arrives at a sensitive component via the space,