5
6
Pull
out
the
power
plug
before
cleaning
the
switch
.
Do not
use
wet
cloth nor
liquid to wipe or wash the switch;
Do not
leave
the
switch close to
water
or
wet
place so as to
prevent
water
or
dampness from entering into the
switch
;
Make sure
the
switch
work in
a
clean
environment
.
Excessive
dust
may
cause
electrostatic adsorption
,
which will
affect the equipment life and
cause
communication
failure
;
The
switch
will
work
normally
under
the
correct
voltage
.
Please ensure the
voltage indicated on the switch corresponds to
the
power
voltage
;
To
avoid
the danger of electric
shock
,
please do not
open
the switch case
.
Do not
open
the
switch case even if the switch is powered off
;
The accessories
(including but not limited to power lines, etc.
),
which
can
be
used for
the switch
only
,
is prohibited for other
applications.
The
device
should
work
in
indoor environment
to avoid
thunder
stroke. It is
important to obey the following requirements no
matter
you
install
it
in
the
cabinet
or
on
the
workbench directly:
Enough space (larger than 10cm) for air
outlet so as to facilitate the heating
dissipation
;
Good ventilation system for cabinets and workbench;
Cabinet
and
workbench
is
sturdy
enough
to
support
the
injector
and
it
'
s
accessories
'
s
weight
;
Cabinet
and
workbench
have
good
grounding
.
When it is working, the
switch
may be affected by external interference outside
the
system through the ways of radiation and conduction. Please pay attention
to the followings
:
AC
power
supply
is
TN
system, so it is necessary to
use
single
phase
power
socket (PE) which can protect ground wire so that
the
filter
circuit
can
effectively filter out the power grid disturbances;
The switch
should
work far away from high-power radio transmitters, radar
transmitters, high-frequency devices;
Use electromagnetic shielding
if
necessary
,
such as shielded cable;
Interface
cables
should be arranged indoor
rather
than
outdoor
to
prevent
over-voltage and over-current caused from damaging
to
the
signal
port
.
2.2.2 Installation Requirements
2 2 3
. . The Requirements of Electromagnetic Environment
There are 3
installation
ways
:
rack
,
workbench
and
installation
.
wall-hung
Installation process
(1) Check rack grounding and stability;
(2) Use screws to fit hangers at the device board side;
:
Figure 2
-
1
Install
hangers
diagram
(3)
proper position
(4)
Put the device on the rack’s bracket and move the rack along the slot to
;
Use screws to fit the installation hanger at rack’s fixed slot, make sure the
device is installed at rack’s bracket steadily.
Figure 2 2
-
Install switch to the rack
Please
pull
out
the
power
line
before installing or moving the switch.
Grounding and anti-lightening can greatly increase the protection level of
the switch. please connect the earth terminal to the earth by using at least
wire 20.
Caution
2 3
.
Installation Way
2 3 1
. . Rack Installation
