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B-4
Cisco CRS-1 Carrier Routing System 16-Slot Multishelf System Site Planning Guide
OL-7422-04
AppendixB Specifications
Safety and Compliance Specifications
Safety and Compliance Specifications
For information about the compliance and safety standards with which the Cisco CRS-1 Multishelf
System conforms, see Regulatory Compliance and Safety Information for the Cisco CRS-1 Carrier
Routing System.
External cooling
requirements
3.4 tons
Chassis airflow Up to 2050 cubic feet (58,050 liters) per minute
Power shelf airflow 100 to 140 cubic feet (2832 to 3964 liters) per minute
Air exhaust
temperature
129°F (54°C)—At room temperatures of 95 to 102°F (35 to 39°C)
149°F (65°C)—Maximum exhaust temperature, on a fully loaded system
during worst-case operating conditions (50°C and 6000 ft altitude)
Note Air temperature rise is 15°C on a fully loaded system with fans
running at maximum speed (5150 RPM).
At room temperatures below 95°F (35°C), exhausted air is 19°C higher than
room temperature. At temperatures above 102°F (39°C), exhausted air is
15°C higher than room temperature.
Air velocity
(at exhaust)
1400 ft per minute at normal, room temperature, low fan speed (4000 RPM)
1800 ft per minute at high temperature or altitude, high fan speed (5150 RPM)
Note Software controls the speed of the fans based on measurements from
the chassis thermal sensors.
Acoustic noise 72 dBa maximum at 77°F (25°C) ambient temperature
Shock and vibration Designed and tested to meet the NEBS shock and vibration standards
defined in GR-63-CORE (Issue 2, April 2002).
Table B-2 Fabric Card Chassis Environmental Specifications (continued)
Description Value