Shock And Vibration; Power Source Interruptions - Cisco WAE-674-K9 - Wide Area Application Engine 674 Hardware Installation Manual

Maintaining Your Site Environment

Shock and Vibration

Power Source Interruptions

Cisco Wide Area Application Engine 7341, 7371, and 674 Hardware Installation Guide
B-6
Printers
•
Telephones with real bells
•
Fluorescent lights
•
Excessive shock can damage the function, external appearance, and physical
structure of a system. Each system has been designed to operate properly even
after withstanding a minimum of six consecutively executed shock pulses in the
positive and negative x, y, and z axes (one pulse on each side of the system). Each
shock pulse can measure up to 5 gravities (G) for up to 11 milliseconds (ms). In
storage, the system can withstand shock pulses of 20 G for 11 ms.
Excessive vibration can cause the same problems as mentioned earlier for shock,
as well as causing components to become loose in their sockets or connectors.
Systems can be subject to significant vibration when being transported by vehicle
or when operated in an environment with machinery that causes vibration.
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 and one or both of
the following methods should be used:
Use one of the power protection devices described in the
•
Protection Devices" section on page
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:
Copier machines
–
Air conditioners
–
Vacuum cleaners
–
– Space heaters
Power tools
–
Appendix B Maintaining the Wide Area Application Engine
B-7.
"Using Power
OL-15012-02