To avoid possible bodily injury and device
impairment, please read the following safety recommendations carefully before
installing the S9500 series. The recommendations do not cover every possible
hazardous condition.
l
The S9500 series use redundant PSUs. Turn off
all PSUs and remove all the power cords before opening the chassis.
l
Keep the chassis clean and dust-free.
l
Keep the chassis and installation tools away
from walk areas.
l
Look carefully for possible hazards in your work
area, such as ungrounded power extension cables, missing safety grounds, and
moist floors.
l
Locate the emergency power-off switch in the
room before installation. Shut the power off at once in case accident occurs.
l
Unplug all the power cords and external cables
before moving the chassis.
l
Better not maintain the equipment alone when it
has been powered.
l
Never assume but check each time that power has
been disconnected from a circuit.
l
Do not place the switch on a moist area and
avoid liquid flowing into the switch.
The S9500 series are rather big and heavy,
so follow the recommendations below when moving it.
l
Remove all the external cables (including power
cords) before moving the chassis.
l
Do not move the switch alone. Work with another
person.
l
Move the switch slowly and stably. Never move
suddenly or twist your body.
l
Move the switch at stable and consistent paces
with your peer. Keep balance of your body.
Caution:
You can only hold the handles at both sides of the chassis when
moving the switch, but not the plastic panel of the chassis, the handle of the
fan frame, the handle of the PSUs or the air vents of chassis.
As these parts are not designed for bearing the weight of the entire
chassis, any attempt trying to carry the switch with these parts may impair the
switch and even injure yourself.
To prevent the electronic components from
being damaged by the electrostatic discharge (ESD), take ESD measures for the
area where the switch is located and note the issues below:
l
Always wear an ESD-preventive wrist strap when
installing the parts, especially the electric printed circuit boards.
l
Hold the circuit board by the edge. Do not touch
the components or the electric printed circuit.
Take the following steps to use the
ESD-preventive wrist strap.
Step 1: Wear the wrist strap on your wrist.
Step 2: Lock the wrist strap tight around
your wrist to keep good contact with the skin.
Step 3: Insert it into the hole peculiar to
ESD-preventive wrist strap in the chassis or attach it to the grounding screw
of the chassis the alligator clips.
Step 4: Make sure that the ESD-preventive
wrist strap is well grounded.
Caution:
For the sake of
safety, check the resistance of the ESD-preventive wrist strap. The resistance
reading should be in the range of 1 to 10 Mohm between human body and the
ground.
Some LPUs of the S9500 series have optical
interfaces. In operating status, it is prohibited to stare into the open
optical interface because the laser being transmitted through the optical fiber
will produces a small beam of light which has very high power density and is
invisible to human eyes; when a beam of light enters the eye, retina may be
burned.
Caution:
The laser inside
the optical fiber may hurt your eyes.
The S9500 series can only be used indoors.
To ensure that the switch works normally and to prolong its service lifetime,
the following requirements should be met in terms of installation environment.
To ensure the normal operation and service
lifetime of a switch, proper temperature and humidity should be maintained in
the equipment room. Long-lasting high humidity in the equipment room is prone
to poor insulation or even leakage of the insulating material. Sometimes, the
mechanical performance deterioration, the rustiness and corrosion of some metal
parts are also more likely to occur. If the relative humidity is too low, the
captive screws may become loose due to the insulation washer contraction.
Meanwhile, the electrostatic is likely to be produced in the dry environment,
which will jeopardize the CMOS circuit of the switch. The higher the
temperature, the greater the damage it will do to the switch. Long-lasting high
temperature will speed up the aging process of the insulating materials,
greatly lower the reliability of the switch, and therefore affect its service
life seriously.
Dust is a hazard to the operating safety of
the switch. The indoor dust accumulated on the chassis can cause electrostatic
adsorption, which may result in the poor contact of the connector or metal
contact point. This happens more frequently when indoor relative humidity is
low, which will not only shorten the service life of the switch, but also cause
communication failure.
The required specifications on dust content
and particle diameter in an equipment room are shown in the following table.
Table 3-1 Limitation
on dust content in equipment room
|
Mechanical active material
|
Unit
|
Content
|
|
Dust particle
|
particles/m
|
≤3 x 104
(No visible dust on desk in three days)
|
|
Note: Dust particle diameter ≥ 5 m
|
Besides the dust specifications, the
equipment room of the switch should also meet the rigorous requirements for the
content of salt, acid and sulfide in the air. These harmful gases could
accelerate the metal erosion and the aging process of some parts. Incursion of
harmful gases, such as SO2, H2S, NO2, NH3,
and Cl2, should be prevented. The specific limitation values of
these harmful gases are given in the following table.
Table 3-2 Harmful
gas limits in an equipment room
|
Gas
|
Average (mg/m3)
|
Max. (mg/m3)
|
|
SO2
|
0.3
|
1.0
|
|
H2S
|
0.1
|
0.5
|
|
NO2
|
0.004
|
0.15
|
|
NH3
|
1.0
|
3
|
|
Cl2
|
0.1
|
0.3
|
Any possible interference sources, no
matter outside or inside the system, affect the switch in use in a way of
capacitive coupling, inductive coupling, electromagnetic radiation, common
impedance (including the grounding system) coupling or conducting line (power
line, signaling line and transmission line etc). To prevent the interference,
you should:
l
Take effective measures against electrical net
interference for power supply system.
l
Separate the working ground of the switch from
the grounding device of the power supply equipment or lightning-protection
grounding device as far as possible.
l
Keep the switch far away from the radio
launcher, radar launcher, and high-frequency devices working in the high
current.
l
Adopt electromagnetic shielding if necessary.
A good grounding system is not only the
basis essential to the stable and reliable switch operation, but also an
important guarantee of lightning protection, anti-interference and
ESD-prevention. The user must provide good grounding system for the switch.
The S9500 series adopt redundant PSUs.
Where,
l
AC PSU:
Rated voltage: 100 VAC to 240 VAC, 50 Hz or
60 Hz
Maximum tolerance: 90 VAC to 264 VAC, 50 Hz
or 60 Hz
Maximum power output: 600 W (S8502)/1200 W
(S9505)/2000 W (S9508/S9512)
l
DC PSU:
Rated voltage: –60 VDC to –48 VDC
Maximum tolerance: –72 VDC to –36 VDC
Maximum power output: 600 W (S8502)/1200 W
(S9505)/2000 W (S9508/S9512)
3.2.6 Space Requirements
For the sake of adequate ventilation and
easy equipment maintenance, you are recommended to keep one meter of clearance
between the rear/front of the switch cabinet and the wall surface or other
devices. If the optional cabinet is desired, the clear height of the equipment room
must be more than 3 meters inclusive.
Before cabinet-mounting the switch, make
sure that the cabinet meets the following requirements:
l
Better mount the switch in an open cabinet.
However, if you want to mount it in a closed cabinet, make sure of the
availability of a good ventilation system.
l
Make sure that the cabinet stands steadily
enough to support the weight of the switch and the accessories.
l
Make sure that the switch fits the cabinet size.
Leave some clearance beside the left and right panels of the switch for chassis
ventilation.
Table 3-3 Required installation tools
|
General tools
|
Measure and lineation tools
|
Long tape, ruler (1 meter in length), gradienter,
marking pen, powder marker, pencil
|
|
Drills
|
One percussion drill, several drill bits,
one vacuum cleaner
|
|
Fastening tools
|
Flat-blade screwdriver P4 -- 75 mm
Phillips screwdriver P1 -- 100mm, P2 --
150mm and P3 -- 250mm
Socket wrench M5
Box-end wrench M6
Double ring spanner (10-12) or open-end
wrench (10-12)
|
|
Small tools
|
Sharp-nose pliers, diagonal pliers,
vices, hand-held electric drill, file, handsaw, crowbar, rubber hammer
|
|
Auxiliary tools
|
Brush, tweezers, paper knife, hand
bellows, electric iron, solder wire, fork, ladder
|
|
Special tools
|
ESD-preventive wrist strap, cable
stripper, crimping pliers, RJ-45 crimping pliers, wire punchdown tool
|
|
Meters
|
Multimeter, 500V Meg-ohmmeter (used for
measuring the insulation resistance), error detector, optical power meter,
earth resistance tester
|
|
|
|
|
The instruments and
tools are not shipped with the S9500 series and it is up to the users to ensure
their availability.
