Preparing The Site; Humidity Requirements; Altitude Requirements - Cisco MDS 9700 Series Hardware Installation Manual

Preparing the Site

This chapter includes the following sections:
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Humidity Requirements

High humidity can cause moisture to seep into the switch. Moisture can cause corrosion of internal components
and degradation of properties such as electrical resistance, thermal conductivity, physical strength, and size.
The switch is rated to operate at 8 to 80 percent relative humidity, with a humidity gradation of 10 percent
per hour.
The switch can withstand from 5 to 90 percent relative humidity. Buildings in which the climate is controlled
by air-conditioning in the warmer months and by heat during the colder months usually maintain an acceptable
level of humidity for the switch equipment. However, if the switch is located in an unusually humid location,
you should use a dehumidifier to maintain the humidity within an acceptable range.

Altitude Requirements

If you operate a switch at a high altitude (low pressure), the efficiency of forced and convection cooling is
reduced and can result in electrical problems that are related to arcing and corona effects. This condition can
Humidity Requirements, on page 61
Altitude Requirements, on page 61
Dust and Particulate Requirements, on page 62
Minimizing Electromagnetic and Radio Frequency Interference, on page 62
Shock and Vibration Requirements, on page 63
Grounding Requirements, on page 63
Planning for Power Requirements, on page 63
Power Modes Overview, on page 64
Rack and Cabinet Requirements, on page 66
Clearance Requirements for Cisco MDS 9700 Series Directors, on page 68
Rack-Mounting Guidelines, on page 70
Installing and Removing the Brackets, on page 71
Installing the Cisco MDS 9700 Series Shelf Bracket Kit into a Rack, on page 71
Installing the Switch on the Brackets, on page 72
Removing the Shelf Bracket Kit, on page 74
C H A P T E R
Cisco MDS 9700 Series Switches Hardware Installation Guide
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