User Manual

3-7
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide
OL-5802-09
Chapter 3 Technical and Environmental Specifications
Environmental Specifications
Environmental Specifications
Table 3-4 lists the environmental specifications for the Cisco CRS 8-slot LCC.
Mounting screws
• 48 screws for each chassis, 12 screws in each of 4 vertical rails,
installed in holes with tick marks
• Number 10-32 x 5/8 in. long socket head cap screws (sixty
screws provided with the chassis)
Note If you plan to use mounting screws other than the ones
shipped with the chassis, you can use 10-32, 10-24, 12-24, or
M5 screws. (M6 and 1/4-20 screws do not fit.)
Compliance
Make sure that the rack complies with all appropriate standards for
your geographical area—for example, NEBS Seismic Zone 4
(GR-63-CORE, Sections 4.4.1 and 4.4.2).
Additional Rack Considerations
Interface cables When choosing a rack, consider cabling needs (chassis front). Allow
at least 95 lb (43.1 kg) weight for each chassis for cables.
Table 3-3 8-Slot Line Card Chassis and Equipment Rack Specifications (continued)
Table 3-4 8-Slot Line Card Chassis Environmental Specifications
Description Value
Temperature Operating, nominal: 41° to 104°F (5° to 40°C)
Operating, short-term: 23° to 122°F (–5° to 50°C)
Nonoperating: –40° to 158°F (–40° to 70°C)
Humidity Operating: 5 to 85% noncondensing
Nonoperating: 5 to 90% noncondensing, short-term operation
Altitude 1 to 5906 ft (0.305 m to 1800 m) at 122°F (50°C), short-term
Up to 13,123 ft (4000 m) at 104°F (40°C) or below
Heat dissipation 28,720 BTU per hour (fixed configuration DC)
1
32,570 BTU per hour (modular configuration DC)
2
1. Heat dissipation from the DC power system based on maximum output power capacity at 94% efficiency.
2. Heat dissipation from the DC power system based on maximum output power capacity at 88% efficiency.
Depending on the hardware deployed at your site, your system may not consume or be capable of consuming the maximum power supplied by the power
system.
External cooling requirements 2.3 tons
Chassis airflow Up to 900 cubic feet (25,485 liters) per minute
Power system airflow Up to 240 cubic feet (6800 liters) per minute
Sound power level
(fixed configuration power)
81 dB—80°F (27°C) or lower (fan speed 4000 RPM, nominal)
92 dB—104°F (40°C) or higher (fan speed 6500 RPM)
Sound power level
(modular configuration power)
77 dB—80°F (27°C) or lower (fan speed 3700 RPM)
89 dB—104°F (40°C) or higher (fan speed 6500 RPM)
Shock and vibration Designed and tested to meet the NEBS shock and vibration standards defined in
GR-63-CORE (Issue 2, April 2002).