Cisco 7000 and Cisco 7507 Rack-Mount Kit Installation Instructions 11
Prerequisites
When you replace the powersupplies, remember to engage all of the safety features on each supply.
The power supplies feature the following three safety interlock features:
•A safety interlock on/off switch (see Figure 6) prevents the power supply from being removed
from the chassis when the powersupply switch is in the on (|) position. When the switch is on, a
metal tab extendsinto a slot in the chassis. When the switch is turned off (O), the tab retracts into
the power supply housing and clears the slot.
•A captive installation screw at the top of the power supply front panel provides electrical
grounding and preventsthe power supply from vibrating or sliding out of the bay and dislodging
from the power connectors in the backplane.
•A cable retention clip preventsthe power supply power cord from being accidentally pulled out
of the power supply socket.
For a complete description of the power supply,refer to the Cisco 7000 Hardware Installation and
Maintenance or Cisco 7507 Hardware Installation and Maintenance publications.
Figure 6 Power Supply Safety Interlocks—AC-Input Power Supply Shown
Equipment Rack Considerations
This kit is suitable for mounting the chassis in most 19-inch 2-post, 4-post, or Telco-typeracks that
conformto the EIA-310-C standard. The brackets, which support the chassis, cantilever off two rack
posts. Youcan mount the chassis with either end approximately flush with the two rack posts, or, in
Telco-typeinstallations, you can center-mount the chassis. Before proceeding, review the guidelines
in this section and ensure that you haveplanned your installation carefully to avoid hazards such as
top-heavy or unbalanced racks, or cables or equipment that obstruct traffic paths or access to
equipment.
Beforeusing a particular rack, check for obstructions (such as a power strip) that could impair access
to the processor modules or power supplies at the interface processor end, or to the chassis panels
that provide access to the internal field replaceable units (FRUs)at the non-interface processor end
ofthe chassis. Figure 7shows the chassis footprint and outer dimensions, and the clearance required
to remove or install FRUs.
Safety interlock
switch
Locking device
in ON and
locked positions
I
O
H1315a
Cable-retention clip