Shock And Vibration; Power Source Interruptions - Cisco 6509 - Catalyst Chassis Switch Installation Manual

Chapter 2 Preparing for Installation
To predict and remedy strong EMI, you may also need to consult experts in radio frequency interference
Note
(RFI).
If you use twisted-pair cable in your plant wiring with a good distribution of grounding conductors, the
plant wiring is unlikely to emit radio interference. If you exceed the recommended distances, use a
high-quality twisted-pair cable with one ground conductor for each data signal when applicable.
If the wires exceed the recommended distances, or if wires pass between buildings, give special
consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by
lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors
to destroy electronic devices. If you have had problems of this sort in the past, you may want to consult
experts in electrical surge suppression and shielding.

Shock and Vibration

Catalyst 6500 series switches have been shock- and vibration-tested for operating ranges, handling, and
earthquake standards to NEBS (Zone 4 per GR-63-Core). These tests have been conducted in earthquake
environment and criteria, office vibration and criteria, transportation vibration and criteria, and
packaged equipment shock.

Power Source Interruptions

Systems are especially sensitive to variations in voltage supplied by the AC power source. Overvoltage,
undervoltage, and transients (or spikes) can erase data from memory or even cause components to fail.
To protect against these types of problems, power cables should always be properly grounded. Also,
place the system on a dedicated power circuit (rather than sharing a circuit with other heavy electrical
equipment). In general, do not allow the system to share a circuit with any of the following:
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Besides these appliances, the greatest threats to a system power supply are surges or blackouts that are
caused by electrical storms. Whenever possible, turn off the system and any peripherals, and unplug
them from their power sources during thunderstorms. If a blackout occurs—even a temporary
one—while the system is turned on, turn off the system immediately and disconnect it from the electrical
outlet. Leaving the system on may cause problems when the power is restored; all other appliances left
on in the area can create large voltage spikes that can damage the system.
OL-5781-04
Copy machines
Air conditioners
Vacuum cleaners
Space heaters
Power tools
Teletype machines
Laser printers
Facsimile machines
Any other motorized equipment
Catalyst 6500 Series Switches Installation Guide
Site Requirements
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