Installation Manual
©
2011
Maipu Communication Technology Co., Ltd,
All Rights Reserved
8
captive screw. In the dry climate, electrostatics may be caused which is harmful for the
CMOS circuit of switch. The higher the temperature is, the more dangerous it is. It will
greatly reduce the reliability of the switch, and long-term high temperature will affect the
life span of the switch. Over-high temperature may accelerate the aging of the insulated
materials.
Table
Table
Table
Table 3-1
3-1
3-1
3-1 The
The
The
The temperature
temperature
temperature
temperature and
and
and
and humidity
humidity
humidity
humidity requirements
requirements
requirements
requirements
Temperature
Humidity
Long-term
Short-term
Long-term
Short-term
15
℃
-30
℃
0
℃
-50
℃
40%-65%
10%-90%
�
�
�
�
Note
Note
Note
Note::::
1.
1.
1.
1.
short-term
short-term
short-term
short-term means
means
means
means working
working
working
working no
no
no
no more
more
more
more than
than
than
than 48h
48h
48h
48h less
less
less
less than
than
than
than 15
15
15
15 days
days
days
days a
a
a
a year
year
year
year
；
2.
2.
2.
2.
The
The
The
The critical
critical
critical
critical working
working
working
working environment
environment
environment
environment means
means
means
means the
the
the
the possible
possible
possible
possible temperature
temperature
temperature
temperature and
and
and
and
humidity
humidity
humidity
humidity when
when
when
when there
there
there
there is
is
is
is no
no
no
no air-conditional.
air-conditional.
air-conditional.
air-conditional. It
It
It
It should
should
should
should be
be
be
be recovered
recovered
recovered
recovered in
in
in
in 5h.
5h.
5h.
5h.
2.2.2
2.2.2
2.2.2
2.2.2 Neatness
Neatness
Neatness
Neatness
Dust is harmful for the operation of the switch. The dust in the room fell on the equipment
may cause the absorption of the electrostatics, which may influence the life span of the
switch and cause the communication failure. The requirement for the dust and the grin
size is as following:
Table
Table
Table
Table 3-2
3-2
3-2
3-2 The
The
The
The requirement
requirement
requirement
requirement for
for
for
for the
the
the
the dust
dust
dust
dust in
in
in
in switching
switching
switching
switching room
room
room
room
The maximum diameter (um)
0.5
1
3
5
The maximum thickness (the
number of grain per m
3
)
1.4×10
7
7×10
5
2.4×10
5
1.3×10
5
Besides dust, switching room also strictly requires the content of salt, acid and sulfide.
This harmful gas may accelerate the rusting and aging of same parts. Such harmful gas
must be prevented as SO2, H2O, NO2, NH3 and CL2. The restricted value is as following:
Table
Table
Table
Table 3-3
3-3
3-3
3-3 The
The
The
The limitation
limitation
limitation
limitation of
of
of
of harmful
harmful
harmful
harmful gas
gas
gas
gas
Gas
Average (mg/m
3
)
Maximum (mg/m
3
)
SO2
0.2
1.5
H2S
0
0.03
