H3C WX2880X Access Controllers Installation Guide-6W100

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01-Preparing for installation
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1 Preparing for installation

Safety recommendations

To avoid any equipment damage or bodily injury, read the following safety recommendations before installation. Note that the recommendations do not cover every possible hazardous condition.

Safety symbols

When reading this document, note the following symbols:

WARNING WARNING means an alert that calls attention to important information that if not understood or followed can result in personal injury.

CAUTION CAUTION means an alert that calls attention to important information that if not understood or followed can result in data loss, data corruption, or damage to hardware or software.

General safety recommendations

·     Make sure the installation site is flat, vibration-free, and away from electromagnetic interferences. Make sure ESD and anti-slip measures are in place.

·     Do not place the device on an unstable case or desk. The device might be severely damaged in case of a fall.

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

·     Keep the chassis clean and dust-free.

·     Do not place the device near water or in a damp environment. Prevent water or moisture from entering the device chassis.

·     Ensure good ventilation of the equipment room and keep the air inlet and outlet vents of the device free of obstruction.

·     Make sure the operating voltage is in the required range.

·     Use a screwdriver to fasten screws.

·     After you move the device from a location below 0°C (32°F) to the equipment room, follow these guidelines to prevent condensation:

¡     Wait a minimum of 30 minutes before unpacking the device.

¡     Wait a minimum of 2 hours before powering on the device.

Electrical safety

·     Carefully examine your work area for possible hazards, such as moist floors, ungrounded power extension cables, or missing safety grounds.

·     Locate the emergency power-off switch in the room before installation. Shut off the power immediately if an accident occurs.

·     Unplug all the external cables (including power cords) before moving the chassis.

·     Do not work alone when you operate the device with the device powered on.

·     Always verify that the power has been disconnected when you perform operations that require the device to be powered off.

Laser safety

WARNING

WARNING!

Do not stare into any open apertures of operating transceiver modules or optical fiber connectors. The laser light emitted from these apertures might hurt your eyes.

 

CAUTION

CAUTION:

·     Before you remove the optical fiber connector from a fiber port, execute the shutdown command in interface view to shut down the port.

·     Insert a dust cap into any open optical fiber connector and a dust plug into any open fiber port or transceiver module port to protect them from contamination and ESD damage.

 

Examining the installation site

The device can only be used indoors. To ensure correct operation and a long lifespan for your device, the installation site must meet the requirements in this section.

Temperature and humidity

Maintain the temperature and humidity in the equipment room at acceptable levels.

·     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 bring problems including loose captive screws and circuit failure.

·     High temperature can accelerate the aging of insulation materials and significantly lower the reliability and lifespan of the switch.

To ensure correct operation of the device, the equipment room must meet the temperature and humidity requirements listed in Table1-1.

Table1-1 Temperature/humidity requirements in the equipment room

Item

Requirements

Temperature

0°C to 45°C (32°F to 113°F)

Humidity

5% RH to 95% RH, noncondensing

 

Cleanliness

Dust buildup on the chassis can result in electrostatic adsorption, which causes poor contact of metal components and contact points, especially when indoor relative humidity is low. In the worst case, electrostatic adsorption can cause communication failure. To ensure correct operation, the equipment room must meet the dust concentration requirements listed in Table1-2.

Table1-2 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

 

To eliminate corrosion and premature aging of components, the equipment room must also meet limits on salts, acids, and sulfides, as shown in Table1-3.

Table1-3 Harmful gas limits in an equipment room

Gas

Max. (mg/m3)

SO2

0.2

H2S

0.006

NH3

0.05

Cl2

0.01

NO2

0.04

 

Cooling

The device intakes air from side panels, and exhausts air from the rear panels. For adequate heat dissipation of the device, follow these guidelines:

·     Plan the installation site for the device based on the airflow direction

·     Reserve a minimum clearance of 100 mm (3.94 in) around the air vents.

·     Make sure the rack or workbench has a good ventilation system.

Figure1-1 Heat dissipation

 

ESD prevention

On the communication network, ESD comes from the following sources:

·     External electric field such as outdoor high-voltage power lines and thunder and lightning.

·     Indoor environment, floor materials, device materials, and device components.

To prevent electrostatic discharge (ESD), follow these guidelines:

·     Ground the device reliably.

·     Take dust-proof measures for the equipment room. For more information, see "Cleanliness."

·     Maintain the humidity and temperature at acceptable levels. For more information, see "Temperature and humidity."

·     Before working with the device, wear ESD gloves and ESD garment, and remove conductive objects such as jewelry or watch. Make sure the wrist strap makes good skin contact and is reliably grounded.

·     Always remember to wear an ESD wrist strap when working with a transceiver module.

No ESD wrist strap is provided with the device. Prepare one yourself.

To attach an ESD wrist strap:

1.     Wear the wrist strap on your wrist.

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

3.     Secure the wrist strap lock and the alligator clip lock together.

4.     Attach the alligator clip to the rack.

5.     Make sure the rack is reliably grounded.

Figure1-2 Attaching an ESD wrist strap

(1) Alligator clip

(2) ESD wrist strap

(3) Lock

 

EMI

All electromagnetic interference (EMI) sources, from outside or inside of the device and application system, adversely affect the device 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 device far away from radio transmitting stations, radar stations, and high-frequency devices.

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

·     To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning strikes, route interface cables only indoors. If you must route interface cables outdoors, install network port lightning protectors.

Lightning protection

Lightning strikes might damage the device when the lightning strike intensity exceeds a certain limit.

To better protect the device from lightning, follow these guidelines:

·     Make sure the grounding cable of the chassis is grounded reliably.

·     Make sure the grounding terminal of the AC power receptacle is grounded reliably.

·     Install a lightning protector at the input end of the power supply to enhance the lightning protection capability of the power supply.

Installation accessories

Figure1-3 Installation accessories for the device

 

Installation tools

No installation tools are provided with the device. Prepare installation tools as required.

Figure1-4 Installation tools

 

Pre-installation checklist

Table1-4 Pre-installation checklist

Item

Requirements

Result

Installation site

Ventilation

·     There is a minimum clearance of 100 mm (3.94 in)) around the device for heat dissipation.

·     A good ventilation system is available at the installation site.

 

Temperature

0°C to 45°C (32°F to 113°F)

 

Humidity

5% RH to 95% RH, noncondensing

 

Cleanliness

·     Dust concentration ≤ 3 × 104 particles/m3

·     No dust on desk within three days

 

ESD prevention

·     The device is reliably grounded.

·     The equipment room is dust-proof.

·     The humidity and temperature are at acceptable levels.

·     When you install removable modules, wear an ESD wrist strap and make sure the strap makes good skin contact and is reliably grounded.

 

EMI prevention

·     Effective measures are taken for filtering interference from the power grid.

·     The protection ground of the device is away from the grounding facility of power equipment or lightning protection grounding facility.

·     The device is far away from radio transmitting stations, radar stations, and high-frequency devices.

·     Electromagnetic shielding is used as required.

 

Lightning protection

·     The device is reliably grounded.

·     The AC power source is reliably grounded.

·     (Optional.) Network port lightning protectors are installed.

·     (Optional.) A surge protected power strip is installed.

 

Electricity safety

·     A UPS is available.

·     The power-off switch in the equipment room is identified and accessible so that the power can be immediately shut off when an accident occurs.

 

Rack-mounting requirements

·     The rack has a good ventilation system.

·     The rack is sturdy enough to support the weight of the device and installation accessories.

·     The size of the rack is appropriate for the device.

·     The front and rear of the rack are a minimum of 0.8 m (31.50 in) away from walls or other devices.

 

Safety precautions

·     The device is far away from any moist area and heat source.

·     You have located the emergency power switch in the equipment room.

 

Accessories

Accessories provided with the device are available.

 

Reference

·     Documents shipped with the device are available.

·     Online documents are available.

 

 

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