Cisco Systems MGX 8230 manual Connecting Power for AC Systems

Chapter 4 Enclosure Installation

Rack Mounting an MGX 8230

Step 9 Before you turn on the system power, check the supply voltage.

The screws at positions 1 and 3 on the pluggable terminal block are convenient measuring points. Also, check the impedance between the safety ground (screw at location 2 on the pluggable terminal block) and the chassis. It should be close to 0.

Step 10 Turn the circuit breaker on all installed PEMs to the off position.

Step 11 Turn on the source power, and check the voltage at the screws at positions 1 and 3 on the pluggable terminal block for all installed PEMs.

Step 12 Turn off the source power, and go to the section “Install the Cable Manager,” which is followed by the section “Power up the MGX 8230.”

Connecting Power for AC Systems

This section describes how to connect AC power to an MGX 8230, which has an optional AC power supply.

The optional AC power supply tray is factory-installed on the bottom of the MGX 8230 chassis. It is one rack unit high and can hold one or two 1200 Watt AC Power Supply Modules. These modules must be re-installed if they were removed during installation of the card cage.

Figure 4-11illustrates a rear view of an AC Power Supply Module. Each AC Power Supply Module has its own independent connectors, power switch, and LEDs.

Figure 4-11 Optional 1200 Watt AC Power Supply Module, Rear View

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Each AC power supply module takes AC power and converts it to -48 VDC, which is then routed through an external cable to the MGX 8230 backplane connector. (There are no DC PEMs in an AC-powered MGX 8230.) Each power supply provides a signal that indicates the status of the power supply.

Note There must be at least two inches of empty space around the front and rear panels of the AC power supply for cooling air.

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
4-14	Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001