Site Selection Guidelines; Site Environmental Requirements - Cisco 4451 ISR Hardware Installation Manual

General Site Requirements
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Site Selection Guidelines

Cisco 4000 Series ISRs require specific environmental operating conditions. Temperature, humidity,
altitude, and vibration can affect the performance and reliability of the router. The following sections
provide specific information to help you plan for the proper operating environment.
Cisco 4000 Series ISRs are designed to meet the industry EMC, safety, and environmental standards
described in the
document.

Site Environmental Requirements

Environmental monitoring in the router protects the system and components from damage caused by
excessive voltage and temperature conditions. To ensure normal operation and avoid unnecessary
maintenance, plan and prepare your site configuration before installation. After installation, make sure
the site maintains the environmental characteristics as shown in
Table 2-1
Environmental Characteristic
Steady State Operating
Storage
Humidity operating (noncondensing)
Humidity nonoperating (noncondensing)
Altitude operating: over allowable temperature
range (0 to 50 degrees C)
Altitude, nonoperating: over allowable temperature
range
Thermal shock non-operating with change over time
of 3 minute
Thermal Shock - Operating at 2.5 degree C per
minute
Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
2-8
Do not modify power cables or plugs. Consult a licensed electrician or your power company for site
modifications. Always follow your local and national wiring rules.
If you turn off your system, wait at least 30 seconds before turning it on again to avoid system
component damage.
Regulatory Compliance and Safety Information for the Cisco 4000 Series ISRs
Router Environmental Tolerances
Chapter 2 Cisco 4000 Series ISRs Preinstallation
Table 2-1.
Minimum Maximum
0 degree C 40 degree C
(40 degrees C at 10,000
feet)
–20 degrees C +70 degrees C
10% 90%
5% 95%
–500 feet 10,000 feet
–1000 feet 50,000 feet
–25 degrees C +70 degrees C
0 degrees C +50 degrees C
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