Table of Contents

Chapter 2 Preparing for Installation. 2-1

2.1 Safety Recommendations. 2-1

2.1.1 General Safety Recommendations. 2-1

2.1.2 Electrical Safety. 2-1

2.1.3 ESD Damage Prevention. 2-1

2.1.4 Handling Safety. 2-2

2.1.5 Laser Safety. 2-2

2.2 Examining Installation Site. 2-3

2.2.1 Temperature Requirements. 2-3

2.2.2 Humidity Requirements. 2-3

2.2.3 Cleanness Requirements. 2-4

2.2.4 EMS Requirements. 2-5

2.2.5 Grounding Requirements. 2-5

2.2.6 Power Supply Requirements. 2-5

2.2.7 Space Requirements. 2-6

2.3 Cabinet-Mounting Requirements. 2-7

2.3.1 Cabinet Requirements. 2-7

2.3.2 Requirements of Supports. 2-8

2.4 Requirements of Power Distribution Box. 2-9

2.4.1 Installing the AC Power Distribution Box. 2-9

2.4.2 Installing DC Power Distribution Box. 2-12

2.5 Installation Tools. 2-16

 

Chapter 2  Preparing for Installation

2.1  Safety Recommendations

To avoid possible bodily injury and equipment damage, please read the following safety recommendations carefully before installing the S9500 series. The recommendations do not cover every possible hazardous condition.

2.1.1  General Safety Recommendations

l           Take necessary safety measures to avoid injury and device damage. For example, wear an ESD-preventive wrist strap.

l           Make sure that the ground is dry and flat and you have adopted anti-slip measures.

l           Keep the chassis clean and dust-free. Do not place the switch on a moist area and avoid liquid flowing into the switch.

l           Keep the chassis and installation tools away from walk areas.

2.1.2  Electrical Safety

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 external cables (including power cords) 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.

2.1.3  ESD Damage Prevention

To prevent the electronic components from being damaged by the electrostatic discharge (ESD), you should not only take ESD measures where the switch is located, but also take the following precautions:

l           Always wear an ESD-preventive wrist strap when installing components, especially the electronic printed circuit boards.

l           Hold the edges of the PCB when necessary. Do not touch any electronic components or printed circuit.

Take the following steps to use the ESD-preventive wrist strap.

1)         Wear the wrist strap on your wrist.

2)         Lock the wrist strap tight around your wrist to keep good contact with the skin.

3)         Insert the ESD-preventive wrist strap into the specially designed hole on the switch chassis or attach it to the grounding screw of the chassis the alligator clips.

4)         Make sure that the ESD-preventive wrist strap is well grounded.

 

 

2.1.4  Handling Safety

Since the S9500 series are rather large and heavy, you should follow the recommendations below:

l           Remove all the external cables (including power cords) before moving the chassis.

l           Do not move the switch alone.

l           Move the switch slowly and stably. Keep in step with your partner and balance your bodies when moving the switch.

 

 

2.1.5  Laser Safety

S9500 series routing switches are class 1 laser products.

When an optional optical interface board of an S9500 switch is operating, do not stare into the open optical port because the laser emitted from it has very high power density and is harmful to your retina.

 

 

2.2  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.

2.2.1  Temperature Requirements

To ensure the normal operation of a switch, the temperature in the room should be maintained within a proper range. Table 2-1 describes temperature requirements.

Table 2-1 Temperature requirements

Temperature	Range
Operating temperature	0°C to 45°C (32°F to 113°F)
Storage temperature	–40°C to +70°C (–40°F to 158°F)

 

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.

 

 

2.2.2  Humidity Requirements

To ensure the normal operation of a switch, the humidity in the equipment room should be maintained within a proper range. Table 2-2 describes humidity requirements.

Table 2-2 Humidity requirements

Humidity	Range
Operating humidity (noncondensing)	10% to 90%
Storage humidity (noncondensing)	5% to 95%

 

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.

2.2.3  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 2-3 Limitation on dust content and particle diameter in the equipment room

Mechanical active material	Content limit (particles/m³)
Dust particle	≤ 3 x 104 (No visible dust on desk in three days)
Note: Dust particle diameter ≥ 5 µm

 

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 2-4 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

 

2.2.4  EMS Requirements

Any possible interference sources, no matter whether outside or inside the system, affect the switch in use through capacitive coupling, inductive coupling, electromagnetic radiation, common impedance (including the grounding system) coupling or conducting line (power line, signalling 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.

 

 

2.2.5  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. The resistance between the chassis and the ground must be less than 1 ohm.

2.2.6  Power Supply Requirements

The following tables describe the specifications for AC and DC PSUs.

Table 2-5 Specifications for AC PSUs

Item	Specifications
	NEPS1200-A	NEPS2000-A	NEPS3500-A
Model	S9505	S9508/S9512	S9508/S9512
Rated voltage range	100 to 240 VAC, 50 Hz or 60 Hz	100 to 120 VAC, 60 Hz 200 to 240 VAC, 50 Hz	100 to 240 VAC, 50 Hz or 60 Hz
Input voltage range	90 to 264 VAC, 50 Hz or 60 Hz	90 to 264 VAC, 50 Hz or 60 Hz	90 to 264 VAC, 50 Hz or 60 Hz
Max input current	15 A	15 A	Single 1800W sub-PSU:15 A Two 1800W sub-PSUs: 30 A

 

Table 2-6 Specifications for DC PSUs

Item	Specifications
	NEPS1200-D	NEPS2000-D	NEPS3500-D
Model	S9505	S9508/S9512	S9508/S9512
Rated voltage range	–48 VDC to –60 VDC	–48 VDC to –60 VDC	–48 VDC to –60 VDC
Input voltage range	–36 VDC to –72 VDC	–36 VDC to –72 VDC	–36 VDC to –72 VDC
Max input current	25 A	42 A	75 A
Max output power	1,200 W	2,000 W	3,500 W

 

2.2.7  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.

2.3  Cabinet-Mounting Requirements

Before mounting the switch in a cabinet, make sure that the cabinet meets the following requirements.

2.3.1   Cabinet Requirements

I. Dimensions

A standard 19-inch cabinet is required.

You can install the switch in an N68 cabinet developed by H3C. There are two types of N68 cabinets available for the S9500 series:

l           N68-18 model: 1.8-meter-high N68 cabinet (600 × 800 × 1800 mm, or 23.6 × 31.5 × 70.9 in.)

l           N68-22 model: 2.2-meter-high N68 cabinet (600 × 800 × 2200 mm or 23.6 × 31.5 × 86.7 in.)

 

 

You can also install the switch in a 19-inch cabinet provided by other vendors.

II. Weight bearing capacity and power

The cabinet must be able to bear the weight of the switch and its accessories. A 20% power margin should be reserved.

III. Grounding requirements

You must provide a good grounding system for the switch. The cabinet must be equipped with a grounding terminal, as shown in Figure 2-1.

(1) Grounding cable

(2) Grounding terminal

Figure 2-1 Ground the cabinet

IV. Heat dissipation

Air enters from the left of the S9500 series and exhausts from the right. Therefore, a clearance of at least 15.2 cm (6.0 in.) is required between the side panels of the cabinet and the switch. If the switch is to be installed in a closed cabinet, make sure that the cabinet has a good ventilation system.

2.3.2  Requirements of Supports

1)         The length of supports depends on the cabinet depth.

2)         You can use supports such as shelf or angles to install the switch into the cabinet. The supports must be able to bear the weight of the switch and its accessories.

Figure 2-2 shows a shelf.

(1) Shelf

Figure 2-2 Shelf

Figure 2-3 shows an angle support.

(1) Angle support

Figure 2-3 Angle support

2.4  Requirements of Power Distribution Box

You can install a power distribution box in the cabinet as required.

2.4.1  Installing the AC Power Distribution Box

I. Terminal Block

The terminal block is set on the bottom of a power distribution box.

Figure 2-4 Terminal block structure diagram

The terminal block has 21 terminals to connect power cords: seven grey terminals, seven blue terminals and seven yellow-green terminals.

l           The grey terminals from L1 to L7 are output ports for live wire. These ports are connected to each other.

l           The blue terminals from N1 to N7 are output ports for neutral wire. These ports are connected to each other.

l           The yellow-green terminals from PE1 to PE7 are output ports for earth wire. These ports are connected to each other and connected to the cabinet.

Table 2-7 Electrical specifications of the terminal block

Item		Specification
Input	Rated current	76A
	Rated voltage	1000V
	Rated cross-sectional area	16 mm2
	Maximum current/maximum crimping area	101A/25 mm2
Output		seven loop outputs

 

II. Power Distribution Box Appearance

Figure 2-5 Front view of the power distribution box

Figure 2-6 Top view of the power distribution box

 

 

III. Connect power cords to the power distribution box

 

 

1)         Use three cables to connect the client power distribution box to the terminal block of the cabinet power distribution box. You are recommended to use the cables with 16 mm² cross-sectional area (the colors of the cables differ depending on the cable specifications in different countries). Connect the power cords according to the following relations:

l           Live wire L in the client power distribution box — Live wire L in the cabinet power distribution box

l           Neutral wire N in the client power distribution box — Neutral wire N in the cabinet power distribution box

l           Earth wire G in the client power distribution box — Earth wire PE in the cabinet power distribution box

2)         Use 3.5 m (11.5 ft) long cables to connect the cabinet power distribution box to the system power supply and PoE power supply. The three wires of each cable should be respectively connected to the ports L, N and PE of the power distribution box. Make sure the protection tubes are used and no wire tailpiece is exposed during the connection. You should connect power cord 1 to L1, N1 and PE1, power cord 2 to L2, N2 and PE2, and so on. The number of power cords depends on the cabinet configuration. Note that you should connect the brown wire to L (live wire), the blue wire to N (neutral wire), and yellow-green wire to PE (earth wire).

3)         After finishing the connection of the cables, bind these cables in order with cable strap, wire them along the right side of the cabinet down, and connect them to the input ports of the system power supply and PoE power supply. You should make sure the cables are not loose.

IV. Installing the power distribution box

You should install the power distribution box on the top of the back of the N68 cabinet. You can adjust the location of the box in a little range.

Figure 2-7  describes the cable connections on the cabinet power distribution box.

(1) User-supplied power distribution box	(2) Guide rail	(3) Power distribution box of the cabinet	(4) S9505 chassis
(5) PoE power entry module	(6) S9505 chassis	(7) System power input	(8) Interface area on external PoE power supply panel
(9) External PoE power supply	(10) PoE AC socket	(11)~(17) No.1 to No.7 power cable	(18) N68 cabinet
(19) Terminal block

Figure 2-7 Cable connections on the power distribution box

2.4.2  Installing DC Power Distribution Box

I. Terminal Block

1)         Terminal block structure diagram

(1) Air switch 1	(2) Air switch 2	(3) Guide rails
(4) PGND wiring terminal block	(5) BGND wiring terminal block	(6) Isolator
(7) Input terminal block

Figure 2-8 Terminal block structure

As illustrated in Figure 2-8, the two leftmost input terminal blocks are DC input terminal blocks. Next to them are two air switches, each of which has a through-current capacity of 63A. On the rightmost side are 9 terminal blocks, 6 of which are BGND terminal blocks and the rest are PGND terminal blocks.

2)         Diagram for connecting terminal blocks

(1) Connected to user-supplied DC power	(2) Connected to the negative terminal of –48 V DC power
(3) Connected to the positive terminal of  –48 V DC power	(4) Grounded and connected to the cabinet

Figure 2-9  Diagram for connecting DC input terminal blocks

3)         Electrical performance of the terminal blocks

Table 2-8 Electrical performance of the terminal block

Item		Specification
Input	Rated current	63 A
	Rated voltage	600 V
	Rated cross-sectional area	16 mm2
	Maximum current/maximum crimping area	63A/16 mm2

 

4)         Terminal block components

Table 2-9 illustrates terminal block components.

Table 2-9 Terminal block components

NO	Name	Quantity
1	End bracket	2
2	Cross connector	3
3	Marker	6
4	Terminal	11
5	Clapboard	7
6	Rail	1
7	Circuit breaker	6

 

II. Installing DC Power Distribution Box

To install power distribution box, take the following steps:

1)         Install the DC input terminal blocks and air switches to the cabinet via the rail, as illustrated in Figure 2-10.

 

Figure 2-10 Install the DC input terminal blocks and air switches

2)         Connect the DC input terminal blocks and the air switches with 6 mm² cables and fix the cable properly. Also use a 6 mm² cable for grounding, as illustrated in Figure 2-11.

Figure 2-11 Backplane diagram for connecting DC input terminal blocks and air switches

3)         Fix the DC power distribution box onto the back of the cabinet.

Figure 2-12 Diagram for fixing the power distribution box to the rear of the N68 cabinet

4)         You can make the air switches to supply power to DC power modules by connecting the lower terminals of the air switches to DC power input terminals and supply voltages to DC power. (Refer to Figure 2-9 for detail. Note that the diameters of the cables need to be 6 mm² or 10 mm².)

5)         You can use the BGND and PGND terminal blocks as needed. The rightmost PGND terminals must be connected to the cabinet using 6 mm² cables, as illustrated in Figure 2-12.

6)         Fasten the connected power cables with a wire and secure them onto the power distribution box.

7)         Use two 16 mm² cables to connect the cabinet and the DC power distribution box. You need to connect the two cables to the leftmost terminal blocks of the cabinet, as illustrated in Figure 2-9.

2.5  Installation Tools

Table 2-10 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	Plain screwdriver P4 - 75 mm Cross-head screwdriver P1 – 100 mm, P2 – 150 mm and P3 – 250 mm Box wrench M5 Ring spanner M6 Double ring spanner (10-12) or open ended spanner (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 punch-down tool
Meters		Multimeter, 500 V Meg-ohmmeter (used for measuring the insulation resistance), error detector, optical power meter, earth resistance tester