Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage may occur when modules or other FRUs are improperly handled, and
result in intermittent or complete failure of the modules or FRUs. Modules consist of printed circuit boards
that are fixed in metal carriers. EMI shielding and connectors are integral components of a carrier. Although
the metal carrier helps to protect the board from ESD, always use an ESD-grounding strap when handling
modules. To prevent ESD damage, follow these guidelines:
•
Always use an ESD wrist strap and ensure that it has maximum contact with bare skin. ESD grounding
straps are available with banana plugs, metal spring clips, or alligator clips. The chassis is equipped with
a banana plug connector (identified by the ground symbol next to the connector) on the front panel.
•
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.
Related Topics
Establishing System Ground, on page 41
Attaching an ESD Strap, on page 43
Power Requirements
Power supplies installed on the switch chassis must be AC input only. When preparing your site for switch
installation, adhere to these requirements:
•
In systems configured with more than one power supply, connect each of the power supplies to a separate
input power source. If you fail to do this, your system might be susceptible to total power failure due to
a fault in the external wiring or a tripped circuit breaker.
•
To prevent loss of input power, be sure that the total maximum load on each source circuit is within the
current ratings of the wiring and breakers.
•
In some systems, you may decide to use an uninterrupted power supply (UPS) to protect against power
failures at your site. Be aware when selecting a UPS that some UPS models that use ferroresonant
technology may become unstable when operating with the switch power supplies that use power factor
correction. This may cause the output voltage waveform to the switch to become distorted, resulting in
an undervoltage situation in the system.
•
The AC-input power supply has a detachable power cord.
•
Each chassis power supply should have a separate, dedicated branch circuit.
•
North America
—
the 1300 W and 3000 W power supplies require a 20 A circuit.
•
International
—
Circuits should be sized according to local and national codes.
•
If you are using a 200 or 240 VAC power source in North America, the circuit must be protected by a
two-pole circuit breaker.
•
The source AC outlet must be within 6 feet (1.8 meters) of the system, and should be easily accessible.
Cisco Catalyst 6807-XL Switch Hardware Installation Guide
OL-30656-01
23
Preparing for Installation
Preventing Electrostatic Discharge Damage
