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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.
Turn on the source power, and check the voltage at the screws at positions 1 and 3 on the pluggable
Step 11
terminal block for all installed PEMs.
Turn off the source power, and go to the section
Step 12
section
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 4-11
its own independent connectors, power switch, and LEDs.
Figure 4-11 Optional 1200 Watt AC Power Supply Module, Rear View
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.
There must be at least two inches of empty space around the front and rear panels of the AC power
Note
supply for cooling air.
Cisco MGX 8230 Edge Concentrator Installation and Configuration
4-14
"Power up the MGX
8230."
illustrates a rear view of an AC Power Supply Module. Each AC Power Supply Module has
"Install the Cable
AC DC
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter 4
Enclosure Installation
Manager," which is followed by the
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