Cisco MGX MGX 8800 Hardware Installation Manual page 339

Chapter 3 Preparing for Installation
Enclosed racks must have adequate ventilation. Ensure that the rack is not overly congested, because
each unit generates heat. An enclosed rack should have louvered sides and a fan to provide cooling air.
The enclosure must also provide adequate cooling through the use of an appropriately sized heat
exchanger or air conditioner, which dissipates the heat generated by existing remote terminal system
components and by the installed MGX 8830 or MGX 8830/B switch.
Power Requirements
The system can accept power from either an optional AC source (AC power supply tray) or a DC source
(DC PEM).
Table 3-19
Specification
Power input voltage
AC system current
requirements
DC system current
requirements
Input AC power
connector
DC input connections
This unit is intended for installation in restricted access areas. A restricted access area is where
Warning
access can only be gained by service personnel through the use of a special tool, lock and key, or
other means of security, and is controlled by the authority responsible for the location. Statement 37
In the United States, restricted access is defined in Articles 10-116, 10-117, and 10-118 of the National
Note
Electrical Code ANSI/NFPA 70.
The following sections provide additional information about power:
•
•
•
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Table 3-19 details the power specifications for both the AC and DC sources.
Power Specifications for the MGX 8830 System
Description
•
Caution
•
Configuration-dependent: Use
general planning purposes: 7 A at a nominal voltage of 200 VAC. At 110
VAC, the current draw is a maximum of 13 A.
Configuration-dependent: Use
general planning purposes: 25 A at nominal –48 VDC; 29 A at –42 VDC
maximum.
IEC 320-type C14 inlet. For a list of the AC power plugs for domestic and
international use, see the
page
Three-position terminal block for 10 AWG wire (4 square millimeters).
AC Power, page 3-48
DC Power, page 3-48
Power Consumption Calculation Tables, page 3-49
Site Requirements for a MGX 8830 or MGX 8830/B Switch
AC source: Requires 220 VAC. Normal operating range is 200 to 240
VAC, 47 to 63 Hz. The maximum voltage range is 90 to 254 VAC.
The AC power source must be within 6 feet (1.8 meters) of the
system and easily accessible.
DC source: –42 to –56 VDC.
"Required Tools and Equipment" section on
3-53.
Cisco MGX 8800/8900 Series Hardware Installation Guide
Table 3-20 for exact requirements. For
Table 3-20 for exact requirements. For
3-47