Contents

1 Preparing for installation· 1-1

Safety recommendations· 1-1

General safety recommendations· 1-1

Electricity safety· 1-1

Moving safety· 1-1

ESD prevention· 1-2

Laser safety· 1-2

Examining the installation site· 1-2

Weight support 1-2

Temperature· 1-2

Humidity· 1-3

Cleanliness· 1-3

EMI 1-3

Grounding· 1-4

Power 1-4

Cooling· 1-4

Space· 1-5

Installation accessories· 1-5

 

1 Preparing for installation

Safety recommendations

To avoid possible bodily injury and equipment damage, read Compliance and Safety Manual provided with the switch and all safety recommendations in this chapter carefully before installation. The recommendations do not cover every possible hazardous condition.

General safety recommendations

·     Keep the switch clean and dust-free.

·     Do not place the switch on a moist area, and avoid liquid flowing into the switch.

·     Make sure the ground is dry and flat and anti-slip measures are in place.

·     Keep the switch and installation tools away from walk areas.

·     Do not wear loose clothing, jewelry (for example, necklace) or any other things that could get caught in the switch when you install and maintain the switch.

Electricity safety

·     Clear the work area of possible electricity hazards, such as ungrounded power extension cables, missing safety grounds, and wet floors.

·     Locate the emergency power-off switch in the room before installation so you can quickly shut power off when an electrical accident occurs.

·     Remove all external cables, including power cords, before moving the chassis.

·     Do not work alone when the switch has power.

·     Before performing a task that is hazardous when power is present, make sure the switch is completely powered off.

Moving safety

	WARNING! Do not hold the handle of a fan tray, a power supply, or a module, or the air vents of the chassis to move the switch. Any attempt to move the switch with these parts might cause equipment damage and even bodily injury.

 

Remove power supplies, modules, and all external cables, including the power cords, before moving the chassis. As a best practice, use a mechanical lift, such as forklift truck, to move the chassis.

If no mechanical lift is used, follow these guidelines to move the chassis:

·     Cooperate with multiple people to move the chassis.

·     Lift the chassis by using the chassis handles or by supporting the bottom from the two sides.

·     Lift and put down the chassis slowly and never move suddenly.

ESD prevention

To prevent the electric component from being damaged by electrostatic discharge (ESD), follow these guidelines:

·     Ground the switch reliably. For how to ground your switch, see "Grounding the switch."

·     Always wear an ESD wrist strap and make sure it is reliably grounded when installing removable components. For how to use an ESD wrist strap, see "Attaching an ESD wrist strap."

·     Hold a module by its edges. Do not touch electronic components or the printed circuit board directly with your hands.

·     If you are not to use a module, put it in an antistatic bag and keep it secure.

Laser safety

	WARNING! Disconnected optical fibers or transceiver modules might emit invisible laser light. Do not stare into beams or view directly with optical instruments when the switch is operating.

 

The switch is a Class 1 laser product.

Examining the installation site

The switch must be used indoors. To ensure correct operation and long service life of your switch, make sure the installation site meets the following requirements.

Weight support

Make sure the floor or ground at the installation site can support the combined weight of the switch and the rack. The total weight of the switch includes the chassis and its components (for example, modules and power supplies) and accessories. For the weights of the switch and its components, see "Weights and dimensions."

To mount the switch in a rack, select slide rails that can support the total weight of the switch.

To assess the load-bearing requirements for the floor and slide rails, take potential system expansion (for example, adding more modules) also in consideration.

Temperature

	CAUTION: If condensation appears on the chassis when you move it to a high-temperature environment, dry the chassis before powering it on to avoid short circuits.

 

If the temperature in the equipment room is too high, too low, or changes dramatically, the device reliability is reduced and its service lifetime is shortened. For long-term, highly available operation of the device, make sure temperature and humidity in the equipment room meets the requirements described in Table1-1.

Table1-1 Temperature requirements

Temperature	Range
Operating temperature	0°C to 40°C (32°F to 104°F)
Storage temperature	–40°C to +70°C (–40°F to +158°F)

 

Humidity

Maintain appropriate humidity in your equipment room, as described in Table1-2.

·     Lasting high relative humidity can cause poor insulation, electricity leakage, mechanical property change of materials, and metal corrosion.

·     Lasting low relative humidity can cause washer contraction and ESD and cause problems including loose mounting screws and circuit failure.

Table1-2 Humidity requirements

Humidity	Range
Operating humidity	5% to 95%, noncondensing
Storage humidity	5% to 95%, noncondensing

 

Cleanliness

Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of metal components and contact points. In the worst case, electrostatic adsorption can cause communication failure.

Table1-3 Dust concentration limit in the equipment room

Substance	Concentration limit (particles/m3)
Dust particles	≤ 3 x 104 (No visible dust on desk in three days)
NOTE: Dust particle diameter ≥ 5 µm

 

The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and premature aging of components, as shown in Table1-4.

Table1-4 Harmful gas limits in the equipment room

Gas	Max. (mg/m3)
SO2	0.2
H2S	0.006
NH3	0.05
Cl2	0.01

 

EMI

All electromagnetic interference (EMI) sources, from outside or inside of the switch and application system, adversely affect the switch in the following ways:

·     A conduction pattern of capacitance coupling.

·     Inductance coupling.

·     Electromagnetic wave radiation.

·     Common impedance (including the grounding system) coupling.

To prevent EMI, perform the following tasks:

·     If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE) to filter interference from the power grid.

·     Keep the switch far away from radio transmitting stations, radar stations, and high-frequency devices.

·     Use electromagnetic shielding, for example, shielded interface cables, when necessary.

Grounding

Using a good grounding system to protect your switch against lightning shocks, interferences, and ESD is essential to the operating reliability of your switch.

Make sure the equipment room grounding network has a resistance value less than 1 ohm.

For more information about grounding the switch, see "Grounding the switch."

Power

Perform the following tasks to provide power as required by the switch:

1.     Calculate the system power consumption.

The system power consumption varies by module types and quantities. For more information about the system power consumption, see "Module power consumption and system power consumption."

2.     Identify the number of power supplies based on the system power consumption.

The total maximum output power of all power supplies must be higher than the system power consumption. For more information about available power supplies, see "Power supplies."

3.     Verify that the power system at the installation site meets the requirements of the power supplies, including the input method and rated input voltage. For more information about power supply specifications, see "Power supplies."

Cooling

Plan the installation site for adequate ventilation:

·     Reserve a minimum clearance of 30 cm (11.81 in) around the inlet and outlet air vents.

·     The rack for the switch has a good cooling system.

·     The installation site has a good cooling system.

·     Verify that the airflow of the chassis match that at the installation site.

Figure1-1 Airflow through the switch

(1) Chassis air intake direction	(2) Chassis air exhaust direction

 

Space

For easy installation and maintenance, follow these space requirements:

·     Reserve a minimum clearance of 1.2 m (3.94 ft) between the rack and walls or other devices.

·     Make sure the rack has enough space to accommodate the switch. See Table1-5 for rack requirements.

For more information about chassis dimensions, see "Weights and dimensions."

Table1-5 Switch dimensions and rack requirements

Model	Chassis dimensions	Rack requirements
S12500X-2L	·     Height—133 mm (5.24 in)/3 RU ·     Width—440 mm (17.32 in) ·     Chassis depth—895 mm (35.24 in) ·     Total depth—1013 m (39.88 in) ¡     104 mm (4.09 in) from the rack-facing surface of the mounting brackets to the front ends of the cable management brackets ¡     909 mm (35.79 in) from the rack-facing surface of the mounting brackets to the power supply handles at the chassis rear	·     A minimum of 1.1 m (3.61 ft) in depth (recommended) ·     A minimum of 130 mm (5.12 in) between the front rack post and the front door. ·     A minimum of 950 mm (37.40 in) between the front rack post and the rear door.

 

	NOTE: As a best practice, use a rack that has a single door at the front.

 

Installation accessories

Before installation, make sure you have all the required installation accessories.

Table1-6 Installation accessories

Product code	Description	Quantity
2150A0D6	S12500X-2L mounting brackets	1 pair
2113A1P2	S12500X-2L supervisor engine unit (SEU, also called MPU) filler panel	2
2113A0YV	S12500X-2L interface module filler panel	1
2124A01H	S12500X-2L interface module protective blank panel	1
2114A0A4	S12500X-2L power supply filler panel	4
2150A0AB	S12500X-2L cable management bracket	4
·     26020141 ·     26020075	M6 screw and cage nut	4 kits
0404A0EE	Grounding cable	1
28050001	ESD wrist strap	1
04042967	Console cable	1