Dc Power; Site Environment; Site Configuration: Maintaining Normal Operation - Cisco 7246 - uBR Router Hardware Installation Manual
Universal broadband router
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Site Requirements
DC Power
The DC-input power supply operates at –48 volts direct current (VDC) input voltage and supplies +3.5V,
+5.2V, +12.2V, –12.2V, +16V, and –16V DC power to the router's internal components through the
router midplane.
Note
Each DC-input power supply has an electrical current rating of 14A, 700 VA. The power input must be
protected by a 20A circuit breaker or fuse that is in compliance with your local electric regulations.
See
including input voltage and operating frequency ranges.
Site Environment
Table 2-1
are those within which the Cisco uBR7200 series universal broadband router continues to operate;
however, a measurement that is approaching the minimum or maximum of a range indicates a potential
problem. You can maintain normal operation by anticipating and correcting environmental anomalies
before they approach the minimum or maximum of an operating range.
To provide airflow through the Cisco uBR7200 series router, cooling air is drawn in through the air
intake vent on the right side of the chassis (when viewing the router from the front) and is exhausted
through the left side of the chassis. Keep the right and left side of the chassis clear of obstructions and
away from the exhaust of other equipment.
Table 2-1
Specifications for Operating and Nonoperating Environments
Specification
Temperature, ambient operating
Temperature, ambient nonoperating and storage
Humidity, ambient (noncondensing) operating
Humidity, ambient (noncondensing) nonoperating
and storage
Altitude, operating and nonoperating
Vibration, operating
Vibration, nonoperating
Site Configuration: Maintaining Normal Operation
Planning a proper location for the Cisco uBR7200 series universal broadband router and the layout of
your equipment rack or wiring closet are essential for successful system operation. Equipment placed
too close together or inadequately ventilated can cause system overtemperature conditions. In addition,
chassis panels made inaccessible by poor equipment placement can make system maintenance difficult.
Following are precautions that can help avoid problems during installation and ongoing operation.
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
2-6
Appendix A, "Cisco uBR7200 Series Router Specifications,"
lists the operating and nonoperating environmental site requirements. The following ranges
Minimum
32
–4
10%
5%
Sea level
5 to 200 Hz, 0.5 g (1 oct./min.)
5 to 200 Hz, 1 g (1 oct./min.)
200 to 500 Hz, 2 g (1 oct./min.)
Chapter 2
Preparing the Cisco uBR7200 Series Router for Installation
o
o
F (0
C)
o
o
F (–20
C)
for system power specifications,
Maximum
o
o
104
F (40
C)
o
o
149
F (65
C)
90%
95%
10,000 feet (3,050 meters)
–
–
OL-5421-03
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Troubleshooting
