Preventing Electrostatic Discharge Damage - Cisco 6509 - Catalyst Chassis Switch Installation Manual

Chapter 2 Preparing for Installation
In all situations, grounding practices must comply with local National Electric Code (NEC)
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requirements or local laws and regulations.
In installations where FXS modules are installed, supplemental grounding is required.
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Always ensure that all of the modules are completely installed and that the captive installation screws
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are fully tightened. In addition, ensure that all I/O cables and power cords are properly seated. These
practices are normal installation practices and must be followed in all installations.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when modules or other FRUs are improperly
handled, results in intermittent or complete failures. Modules consist of printed circuit boards that are
fixed in metal carriers. Electromagnetic interference (EMI) shielding and connectors are integral
components of the carrier. Although the metal carrier helps to protect the board from ESD, always use
an ESD grounding strap when handling modules.
Follow these guidelines for preventing ESD damage:
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Always use an ESD wrist strap and ensure that it makes maximum contact with bare skin. ESD
grounding straps are available with banana plugs, metal spring clips, or alligator clips. All
Catalyst 6500 series chassis are equipped with a banana plug connector (identified by the ground
symbol next to the connector) somewhere on the front panel. If you have an older Catalyst 6500
series chassis equipped with a plastic banana plug connector, we recommend that you use either the
supplied ESD grounding wrist strap (with a metal clip) or an ESD grounding wrist strap equipped
with an alligator clip. If you have a newer Catalyst 6500 series chassis that has a bare metal hole as
the banana plug connector (also identified by the ground symbol next to the connector), we
recommend that you use a personal ESD grounding strap equipped with a banana plug.
If you choose to use the disposable ESD wrist strap supplied with most FRUs or an ESD wrist strap
equipped with an alligator clip, you must attach the system ground lug to the chassis in order to
provide a proper grounding point for the ESD wrist strap.
This system ground is also referred to as the network equipment building system (NEBS)
ground.
If your chassis does not have the system ground attached, you must install the system ground lug.
See "Establishing the System Ground" section on page 3-22
locations of the chassis system ground pads.
You do not need to attach a supplemental system ground wire to the system ground lug; the lug
provides a direct path to the bare metal of the chassis
for installation instructions and
Catalyst 6500 Series Switches Installation Guide
Site Requirements
2-7