Cisco Systems 7500 Series manual Cisco 7505 Airflow Considerations, Specifications Minimum Maximum

Chapter 2 Preparing for Installation

Site Environment, Chassis Temperature, and Airflow Guidelines

Table 2-1 Environmental Specifications for the Cisco 7500 Series Routers (continued)

Specifications	Minimum		Maximum
Humidity, ambient (noncondensing)	5%		95%
nonoperating and storage
Altitude, operating and nonoperating	Sea level		10,000 ft (3050 m)
Vibration, operating	5 to 200	Hz, 0.5 g1 (1 octave per	–
	minute)
Vibration, nonoperating	5 to 200	Hz, 1 g (1 octave per minute)
	200 to 500 Hz, 2 g (1 octave per minute) –

1. g = force of gravity; 32 ft/sec2.

Cisco 7505 Airflow Considerations

In the Cisco 7505, six individual axial fans draw cooling air through the chassis interior to maintain an acceptable temperature for the internal components. The fans draw air in through the inlet vents on the side of the chassis opposite the fans, across the processor modules and other internal components, and through the exhaust vents adjacent to the fans.

The sides of the chassis must remain unobstructed to ensure adequate airflow and prevent overheating inside the chassis. A temperature sensor on the RSP monitors the internal air temperature. The power supply has two fans for cooling.

Figure 2-7shows the chassis fans and airflow through the Cisco 7505.

Figure 2-7 Airflow Through the Cisco 7505

Top view of router

Chassis airflow

Power supply airflow

Chassis fans

Power supply fans

Interface processor end

Power supply airflow

Chassis airflow

H2000

Service (noninterface processor) end

Fan tray

	Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0		2-13