Preventing Electrostatic Discharge Damage; Laser Safety - 3Com Switch 7700 Installation Manual

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P R E P A R I N G

F O R

4.1.4. Preventing Electrostatic Discharge Damage

To prevent components from being damaged by electrostatic discharge (ESD), take anti-static measures for the area

where the switch is located and note the points below:

To put on the anti-static wrist strap:

1. Put your hand through the wrist strap

2. Tighten the strap to insure that it makes complete contact with your skin

3. Connect the anti-static wrist strap to the grounding pole of the switch chassis with the alligator clip, as

shown in Figure 13.

Figure 13 Wearing an anti-static wrist strap

Grounding

Some I/O modules on the Switch 7700 have optical ports. If no optical connector is connected to the optical ports

or if the dust-proof cover has been removed, there might be invisible laser radiation emitted from the port.

Caut on

: The laser can hurt your eyes. Do not stare into an open optical port.

I N S T A L L A T I O N

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

Move the switch slowly. Never move suddenly or twist your body.

Always disconnect all external cables (including power cord) before lifting or moving

the chassis.

Do not hold the power handles when carrying the switch.

Do not put fingers into the vent of the chassis when carrying the switch.

Since the power handles and vent have not been designed to bear the weight of the

entire chassis, it may damage the switch or even the personnel when carrying the switch.

For safety, check the resistance value of the anti-static strap that is shipped with the

Switch 7700. The resistance value should be between 1 and 10 megohm (Mohm).

Always wear an anti-static wrist strap when installing the parts, especially the electronic

printed circuit boards, of the switch.

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

printed circuit.

Avoid contact between the electric printed circuit board and your clothing. The

anti-static wrist strap protects only the board from electrostatic damage on the body.

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