a) Determine which power supply slots to fill and ensure that each of those slots is open.
If you are using the combined or power supply redundancy mode, you can use any slot for the power supply that
you are installing. If you are using input-source or full redundancy mode, you must group the power supplies that
are to be connected to the same grid on either the left or right power supply slots in the chassis (that is, place the
power supplies for grid A in slots 1 or 2 or both slots and place the power supplies for grid B in slots 3 or 4 or both
slots).
b) Place one hand on the front of the power supply and place your other hand under it to support its weight.
c) Align the power supply to an open power supply slot.
The alignment bracket on top of the power supply should align to a track at the top of the slot and a bar
at the bottom of the power supply should be guided by a track at the bottom of the slot.
Note
d) Slide the power supply all the way into the slot until it stops.
e) Slide the handle in the middle of the ejector lever toward the end of the lever and rotate the lever to the front of the
power supply. Release the middle handle.
The lever should grab the inside of the slot and push the power supply onto its mid plane connectors.
Note
If you are using the combined power or power-supply redundancy mode, you can fill any power supply
slot with the power supplies. If you are using input-source or full redundancy modes, you must place half
of the power supplies in slots 1 and 2, and you must place the other half of the power supplies in slots 3
and 4 (half will be used for available power and the other half will be used for redundant power).
Note
f)
Screw in the two captive screws on the front of the power supply to the chassis. Tighten each screw to 8 in-lb (0.9
N·m).
Grounding a Switch Chassis
The switch is fully grounded as soon as you connect the chassis and the power supplies to the earth ground
in the following ways:
• You connect the chassis to either a fully-bonded, grounded rack or to the data center ground.
The system ground, also referred to as the network equipment building system
(NEBS) ground, provides additional grounding for EMI shielding requirements
and for the low-voltage supplies (DC-DC converters) on the modules. This
grounding system is active even when the AC and HVAC/HVDC power cables
are not connected to the system.
Note
• You connect the AC and HVAC/HVDC power supplies to the earth ground automatically when you
connect an AC or HVAC/HVDC power supply to an AC or HVAC/HVDC power source.
Before you begin
Before you can ground the chassis, you must have a connection to the earth ground for the data center building.
If you installed the switch chassis into a bonded rack (see the rack manufacturer's instructions for more
Cisco Nexus 7706 Hardware Installation Guide
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OL-31330-01
Installing the Switch Chassis
Grounding a Switch Chassis
