Connecting A Dc Power Supply Unit To Dc Power Sources; Grounding A 6-Kw Dc Power Supply Unit; Prerequisites For Grounding A Dc Power Supply Unit - Cisco Nexus 7000 Series Hardware Installation And Reference Manual

Chapter 5 Installing Power Supply Units
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
When you first activate the power supply, you can verify the functionality of the LEDs by checking that
Note
each LED turns on for a couple of seconds.
If the Fault LED is blinking red, turn the power switch to STDBY, check the AC power connections on
the power supply unit and the AC power source, and then turn the power switch back to ON. The Input
and Output LEDs for the connected power supply units should be green and the Fault LED should be off.

Connecting a DC Power Supply Unit to DC Power Sources

To power your Cisco Nexus 7000 Series switch with DC power supply units, you must first ground the
power supply units and then connect the power supply units to a DC power source. You can then connect
the power supply directly to DC power sources or indirectly through a power interface unit (PIU) to a
DC power source.
This section includes the following topics:
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Grounding a 6-kW DC Power Supply Unit

After you have mounted a 6-kW DC power supply unit in a Cisco Nexus 7000 Series chassis, you must
ground the power supply unit to the earth ground before connecting it to the DC power source. You
ground this power supply unit by connecting the grounding pad on the lower front side of the power
supply unit to the earth ground.
Caution Although you connect each DC power supply unit to an earth ground before you connect it to the DC
power grid, you should also connect the chassis to an earth ground. For information on grounding the
Cisco Nexus 7009 chassis, see the
information on grounding the Cisco Nexus 7010 chassis, see the
Chassis" section on page
"Grounding the Cisco Nexus 7018 Chassis" section on page
This section includes the following topics:
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Prerequisites for Grounding a DC Power Supply Unit

Before you can ground a DC power supply unit, you must have a connection to the earth ground for the
data center building.
OL-23069-06
Grounding a 6-kW DC Power Supply Unit, page 5-5
Connecting a DC Power Supply Unit Directly to DC Power Sources, page 5-7
Connecting a Power Supply Unit to DC Power Sources though a Power Interface Unit, page 5-11
3-11. For information on grounding the Cisco Nexus 7018 chassis, see the
Prerequisites for Grounding a DC Power Supply Unit, page 5-5
Required Tools and Equipment, page 5-6
Connecting a DC Power Supply Unit to the Earth Ground, page 5-6
Connecting a DC Power Supply Unit to DC Power Sources
"Grounding the Cisco Nexus 7009 Chassis" section on page
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
"Grounding the Cisco Nexus 7010
4-12.
2-19. For
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