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Cisco MGX 8950 Hardware Installation Guide
Release 3, Part Number 78-14147-02 Rev. A0, November 2002
Chapter 3 Installing a Cisco MGX 8950
Installation Procedures
Warning
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special
precautions to ensure that the system remains stable. The following guidelines are provided to ensure
your safety:
—This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
—When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the
heaviest component at the bottom of the rack.
Before handling any cards, ground yourself to the card cage with a wrist strap.
—If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing
the unit in the rack.
Install the AC Power Supply Tray(s)
Note
AC Power Supplies are optional on the Cisco MGX 8950 switch. If your system uses only DC power,
proceed to the
“Install the Air Intake Plenum” section on page 3-18
.
Before installing the AC power supply tray(s), you should remove the power supplies from the trays.
Removing the AC power supplies makes the AC power tray easier to install. For a mid-mount
installation, you must remove the power supplies from the power tray before installing the tray.
This section contains the following sets of instructions:
•
Remove the AC Power Supplies from the AC Power Tray, page 3-16
•
Install the AC Power Tray, page 3-17
•
Install the AC Power Supplies in the Trays, page 3-18
Tip
If a component requires more than two screws to install it in the rack or cabinet, install the two bottom
screws first.
Tip
Do not tighten the screws completely (maybe half of a turn) until all components are mounted to the rack.
Otherwise, the tolerances in the screw mounting holes can go against you and make it impossible to put
the screws in a piece of equipment you install later. Once all the rack mounted components are in, tighten
all of the screws.
Warning
Before working on a system that has an On/Off switch, turn OFF the power and unplug the power cord.
Warning
Never install an AC power module and a DC power module in the same chassis.
