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Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter3 Preparing for Installation
Site Requirements for the MGX 8850 or MGX 8850/B Switch
Environmental Requirements
Proper operation of an MGX 8850 or MGX 8850/B switch depends on a proper environment. This
section describes environmental requirements for the site where you intend to install the switch.
Table3-1 Space, Weight, and Power Specifications for the Cisco MGX 8850 or MGX 8850/B System
Specification Description
Dimensions
Note Racks must
have 17.75 in.
minimum
between
mounting rails.
DC-powered system 17 RUs
Height: 29.75 in. (75.56 cm)
Width: 19 in. (48.26 cm)
Depth: 21.5 in. (54.6 cm)—Excluding cable management and front door
AC-powered system 20 RUs
Height: 35 in. (88.9 cm)
Width: 19 in. (48.26 cm)
Depth: 21.5 in. (54.61 cm)—Excluding cable management and front door
Weight DC-powered switch
AC-powered switch
Up to 190 lb. (86.26 kg)
Up to 250 lb. (113.5 kg)
Shipping weight for individual components Front and back cards: 6.0 lb. (2.72 kg) per card set
Card cage with cards: 160 lb. (72.64 kg)
Exhaust plenum: 8 lb (3.63 kg)
Fan tray: 9.5 lb (4.3 kg)
Air intake plenum: 8 lb (3.63 kg)
AC power supply tray with power supplies: 45 lb. (20.43 kg)
APS connector: 1 lb (0.45 kg)
Clearance requirement for the enclosure Minimum 30 in. front and rear; 12 in. side clearance recommended
Power input voltage •AC source: Requires 220 VAC. Normal operating range is 200 to
240 VAC, 47 to 63 Hz. The maximum voltage range is 180 to
254 VAC.
Note The AC power source must be within 6 feet (1.8 meters) of the
system and easily accessible.
•DC source: –42 to –56 VDC.
AC system current requirements Configuration-dependent: Use Table 3 -6 for exact requirements. For
general planning purposes: 14.4 A at a nominal voltage of 200 VAC. At
the minimum voltage limit of 180 VAC, the current draw is a maximum
of 16 A.
DC system current requirements Configuration-dependent: Use Tabl e 3-6 for exact requirements. For
general planning purposes: 50 A at nominal –48 VDC; 57.1 A at
–42VDC maximum.