Cisco Systems MGX 8230 MGX 8230 Power System, Optional AC Power Supply

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Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter1 Introducing the MGX 8230
MGX 8230 System Overview
Figure1-3 MGX 8230 Card Cage, Front View
Chapter 3, “Site Preparation” and Chapter 4, “Enclosure Installation” contain additional informa tion on
installing racks and the MGX 8230 chassis.
MGX 8230 Power System
The MGX 8230 power system is desi gn ed w ith di s tribu te d p ower ar ch it ect ure centered around a
-48 VDC bus on the system backplane. The -48 VDC bus accepts redundant DC power from either a -42
to -56 VDC source via optional DC power entry modules (PEMs) or from a 100 to 120 or a 200 to 240
VAC source via the optional AC Power Supply Tray. The MGX 8230 backplane distributes power via
connectors on the - 4 8 V DC bus to each hot-plugga bl e processor or service mo d ul e. Each card
incorporates on-board DC-DC co nverte rs to co nvert th e - 4 8 V DC f r om th e di s tr ibutio n bus vol tag e to
the voltages required on the card .
Optional AC Power Supply
For an AC-powered MGX 8230, an opt i onal AC power supply tray is att ach ed to the bo ttom of the MGX
8230 card cage at the factory. The AC power supp ly tr ay i s o ne ra ck -u n it hi g h, an d can h ol d up t o tw o
AC Power Supply modules. Each AC Powe r Su pply module can provide up to 1,200W at -48 VDC and
has its own AC power cord an d p ower switch. Figure 1-4 shows the rear view of an optional AC Power
Supply module. The power supplies c an be con fig ure d as 1+1 re dunda nt . If no re du ndancy is desired, an
AC tray with one AC power supply and one AC power cord can also be ordered.
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