Table of Contents

Chapter 3 Installation Preparation. 3-1

3.1 Safety Recommendations. 3-1

3.1.1 General Safety Recommendations. 3-1

3.1.2 Safety Recommendations against Electricity. 3-1

3.1.3 Safety Recommendations in Moving the S9500 Series. 3-1

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

3.1.5 Safety Recommendations against Laser 3-2

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. 3-5

3.2.5 Power Supply Requirements. 3-5

3.2.6 Space Requirements. 3-5

3.2.7 Cabinet-Mounting Requirements. 3-5

3.3 Installation Tools. 3-6

 

Chapter 3  Installation Preparation

3.1  Safety Recommendations

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.

3.1.1  General Safety Recommendations

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.

3.1.2  Safety Recommendations against Electricity

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.

3.1.3  Safety Recommendations in Moving the S9500 Series

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.

 

 

3.1.4  Wearing an ESD-Preventive Wrist Strap

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.

 

 

3.1.5  Safety Recommendations against Laser

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.

 

 

3.2  Examining Installation Site

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.

3.2.1  Temperature/Humidity Requirements

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.

3.2.2  Cleanness Requirements

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

 

3.2.3  Anti-Static Requirements

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.

3.2.4  Grounding Requirements

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.

3.2.5  Power Supply Requirements

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.

3.2.7  Cabinet-Mounting Requirements

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.

3.3  Installation Tools

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