H3C S7500 Series Manuel utilisateur

H3C EPON OLT Installation Manual Table of Contents

Table of Contents

Chapter 3 Installation Preparation...............................................................................................3-1

3.1 Safety Information.............................................................................................................. 3-1

3.1.1 General Safety Recommendations ......................................................................... 3-1

3.1.2 Safety of Electricity.................................................................................................. 3-1

3.1.3 Safety of Moving...................................................................................................... 3-1

3.1.4 Wearing an ESD Wrist Strap................................................................................... 3-2

3.1.5 Safety of Laser ........................................................................................................ 3-3

3.2 Examining Installation Site................................................................................................. 3-3

3.2.1 Temperature/Humidity Requirements ..................................................................... 3-3

3.2.2 Cleanness Requirements........................................................................................ 3-3

3.2.3 Anti-static Requirements ......................................................................................... 3-4

3.2.4 Grounding Requirements ........................................................................................ 3-4

3.2.5 Power Supply Requirements................................................................................... 3-5

3.3 Installation Planning........................................................................................................... 3-5

3.3.1 Installation Space Requirement .............................................................................. 3-5

3.3.2 Rack-Mounting Requirements................................................................................. 3-5

3.4 Installation Tools................................................................................................................ 3-6

H3C EPON OLT Installation Manual Chapter 3 Installation Preparation

Chapter 3 Installation Preparation

3.1 Safety Information

To avoid damage to human body and devices, please read the following safety

recommendations carefully before installing S7500 Series Ethernet Switches. The

following recommendations do not cover all the possible hazardous conditions.

3.1.1 General Safety Recommendations

zTurn OFF all the powers and remove all the power cords before opening the

chassis.

zKeep the chassis clean and dust-free.

zKeep the chassis and installation tools away from walk areas.

zDo not wear loose clothing, jewelry (including ring and necklace, and so on) or any

other things that could get caught in the chassis when you install and maintain the

switch.

3.1.2 Safety of Electricity

zLook carefully for possible hazards in your work area, such as ungrounded power

extension cables, missing safety grounds, and moist floors.

zLocate the emergency power-off switch in the room before installation. Shut the

power off at once in case accident occurs.

zUnplug all the power cords and external cables before moving the chassis.

zBetter not maintain the equipment alone when it has been powered by electricity.

zNever assume that power is disconnected from a circuit. Always check.

zDo not place the switch on a moist area and avoid liquid flowing into the switch.

3.1.3 Safety of Moving

S7500 Series Switches are rather big and heavy, so follow the recommendations below

when moving them.

zTurn off all the powers and remove all the power cords before opening the chassis.

zDo not move the switch alone. Work with another person.

zMove the switch slowly and stably. Never move suddenly or twist your body.

zMove the switch at stable and consistent paces with your peer. Keep balance of

your body.

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H3C EPON OLT Installation Manual Chapter 3 Installation Preparation

Caution:

Move a switch by holding the handles on the side of the chassis, instead of the power

handlers or by putting fingers into the vent of chassis, or you may damage the switch

chassis or even your body when you carry the switch, since the power handler and vent

are not designed to bear the weight of the entire switch.

3.1.4 Wearing an ESD Wrist Strap

To prevent the electric component from being damaged by the electrostatic discharge

(ESD), take ESD measures for the area where the switch is located and note the points

below:

zAlways wear an ESD wrist strap when installing the parts, especially the electric

printed circuit boards, of the switch.

zTake the edge of the circuit board. Do not touch the components or the electric

printed circuit.

Take the following steps to use the ESD wrist strap.

Step 1: Put your hand through the wrist strap and wear it.

Step 2: Strain and tighten the strap, ensure that it makes good contact with your skin.

Step 3: Insert it into the ESD wrist strap hole in the switch chassis or attach the alligator

clips to the grounding screw of the chassis.

Step 4: Make sure the ESD wrist strap is well grounded.

Note:

The ESD wrist strap is shipped with the S7500 Series Ethernet Switches.

There is an ESD wrist strap hole above the SRPU slot of the S7500 Series Switch

chassis. The grounding screw is located on the power distribution box sit on the back

floor of the chassis.

Caution:

For safety case, check the resistance of the ESD wrist strap. The resistance between

human body and the ground should be 1 to 10M ohm.

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H3C EPON OLT Installation Manual Chapter 3 Installation Preparation

3.1.5 Safety of Laser

Some LPUs of S7500 Series Ethernet Switches 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, it has very high

power density and is invisible to human eyes, when a beam of light enters the eye,

retina may be burned.

Caution:

Staring at the laser beam inside the fiber could hurt your eyes.

3.2 Examining Installation Site

S7500 series Ethernet switches can only be used indoors. To ensure that the switch

works normally and expand its service life, the installation environment shall meet the

requirements below.

3.2.1 Temperature/Humidity Requirements

To ensure the normal operation and service life of a switch, a certain level of

temperature and humidity should be maintained in the equipment room. If the humidity

in the equipment room is too high for a long time, it will lead to bad insulation of the

insulating material or even creepage. Sometimes, the mechanical performance

changes of material, the rustiness and corrosion of some metal parts are also likely to

occur. If the relative humidity is too low, the captive screws may become loose due to

the shrinkage of the insulation washers. 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 on the switch. High

temperature for a long time will speed up the aging process of the insulation materials,

greatly lower the reliability of the switch and therefore affect its service life seriously.

3.2.2 Cleanness Requirements

Dust is a big harm for the normal operation of the switch. The indoor dust accumulated

on the chassis can cause electrostatic adsorption, resulting in the poor contact of the

connector or metal contact point. This happens more frequently when the relative

indoor 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.

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H3C EPON OLT Installation Manual Chapter 3 Installation Preparation

Table 3-1 Required specifications on dust content in an equipment room

Mechanical active material Unit Content

Dust particle particle/m³ ≤3 x 104(No visible dust on desk in

three days)

Note: Dust particle Diameter ≥5µm

Except the requirements on dust, rigorous requirements on ingredient of salts, acids

and sulfides of air in an equipment room are also set. These harmful gases will speed

up the metal corrosion and the aging processes of certain parts. The equipment room

should be protected from the invasion of harmful gases such as SO2, H2S, NO2, NH3

and Cl2, the value limits of which are shown in the following table:

Table 3-2 Value limits on harmful gas contents in an equipment room

Gas Maximum (mg/m3)

SO20.2

H2S 0.06

NH30.05

Cl20.01

3.2.3 Anti-static Requirements

Any possible interference sources, no matter outside or inside the system, affect the

switch in use may in a way of capacitance coupling, inductance coupling, radiation of

electromagnetic wave, common impedance (including the grounding system) coupling

or conducting line (power line, signaling line and transmission line etc.).Therefore, the

following should be considered:

zAdopt effective measures to protect the power supply system against the power

grid interference.

zSeparate the working ground of the switch from the ground device of the power

supply equipment or lightning-protection ground device as far as possible.

zKeep the switch far away from the radio launcher, radar launcher, and

high-frequency devices working in high currents.

If necessary, adopt electromagnetic shield.

3.2.4 Grounding Requirements

A good grounding system is the basis for a switch to work stably and reliably and the

important guarantee of lightning protection, anti-interference and ESD.A user should

provide good grounding system for the switch.

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H3C EPON OLT Installation Manual Chapter 3 Installation Preparation

3.2.5 Power Supply Requirements

S7500 Series Switches adopt N+1 redundancy power backup. And

1) AC power module parameters:

zAC input voltage: 100 to 240 VAC, 50/60Hz

zMax. voltage: 90 to 264 VAC, 50/60Hz

zMax. output power: 450 W

2) DC power module parameters:

zAC input voltage: -48 to -60 VDC

zMax. voltage: -36 to -72 VDC

zMax. output power: 450 W

3.3 Installation Planning

Since S7500 Series Ethernet Switch is a kind of complex equipment, it is necessary to

make a good plan and arrangement concerning installation position, networking

measure, power supply and cabling before installing it.

3.3.1 Installation Space Requirement

For better heat dissipation and equipment maintenance, it is recommended to keep the

front and back of the switch more than 1 meters inclusive away from the walls or other

devices. There can be other devices located beside the left and right of the switch.

However, you shall keep the left and right of the switch more than 0.8 meters inclusive

away from the walls. If the optional rack will be installed, the clear height of equipment

room should be more than 3 meters inclusive.

3.3.2 Rack-Mounting Requirements

Before rack-mounting a switch, make sure the rack meets the following requirements:

zBetter mount a switch in an open rack. However, if you mount a switch in a closed

rack, make sure of good heat dissipation system.

zMake sure the rack stands steadily enough to well support the switch and

accessories.

zMake sure that the switch fits the rack size. Leave some spaces beside the left and

right panels of the switch for chassis heat dissipation.

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H3C EPON OLT Installation Manual Chapter 3 Installation Preparation

3.4 Installation Tools

Table 3-3 Required installation tools list

Type Name Tools

Measure and

lineation tools

Long tape, ruler (of 1 meter), gradienter, marking

pen, powder marker and pencil

Drills A percussion drill, several auxiliary drill bits, a

vacuum cleaner

Fastening

tools

Flat-blade screwdriver P4-75mm

Phillips screwdriver P1-100mm, P2-150mm and

P3-250mm

Box-end wrench M5

Box-end wrench M6

Box-end wrenches (10-12) or open-end wrench

(10-12)

Small tools

Sharp-nose pliers, diagonal pliers, vices,

hand-held electric drill, file, handsaw, crowbar

and rubber hammer

General tools

Auxiliary tools Hair brush, tweezers, paper knife, hand bellows,

electric iron, solder wire, fork and ladder

Special tools ESD wrist strap, cable stripper, crimping pliers, RJ-45 crimping

pliers and wire punchdown tool

Tools for

fiber-optic

cleaning

Lint-free paper, and optical fiber End-Face microscope

Instruments Multimeter, 500 V Meg-ohmmeter (used to measure the insulation

resistance), error detector, optical power meter and earth

resistance tester

Note:

The instruments and tools are not shipped with S7500 Series Ethernet Switches and

need to be prepared by the users.

3-6

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