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

Chapter 1 Introducing the MGX 8230

MGX 8230 System Overview

Figure 1-3 MGX 8230 Card Cage, Front View

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Chapter 3, “Site Preparation” and Chapter 4, “Enclosure Installation” contain additional information on installing racks and the MGX 8230 chassis.

MGX 8230 Power System

The MGX 8230 power system is designed with distributed power architecture 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 - 48 VDC bus to each hot-pluggable processor or service module. Each card incorporates on-board DC-DC converters to convert the -48 VDC from the distribution bus voltage to the voltages required on the card.

Optional AC Power Supply

For an AC-powered MGX 8230, an optional AC power supply tray is attached to the bottom of the MGX 8230 card cage at the factory. The AC power supply tray is one rack-unit high, and can hold up to two AC Power Supply modules. Each AC Power Supply module can provide up to 1,200W at -48 VDC and has its own AC power cord and power switch. Figure 1-4shows the rear view of an optional AC Power Supply module. The power supplies can be configured as 1+1 redundant. If no redundancy is desired, an AC tray with one AC power supply and one AC power cord can also be ordered.

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
1-6	Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001