Cisco Nexus 7000 Series Hardware Installation And Reference Manual page 150

Connecting a DC Power Supply Unit to DC Power Sources
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
1
Remove the cover.
2
Place the negative power supply unit cable
lugs (2) on the front negative posts. Use one
color for negative cables and another color for
positive cables.
Remove the 16 nuts from the 16 posts.
b.
Attach two negative input lugs to the negative posts on the front side of the PIU (see callout 2 in
c.
Figure
Attach two positive input lugs to the positive posts on the front side of the PIU (see callout 3 in
d.
Figure
Fasten each of the four lugs with two M6 nuts and tighten to 40 in-lb (4.5 N·m) (see callout 4 in
e.
Figure
Connect a power cable with two isolated inputs to the power source.
Step 7
Step 8 If you are using two power cables, connect each power cable to the same or separate power sources as
follows:
For 6 kW of output power, you can connect the cables to the same power source.
•
For 3 kW of output power and 3-kW redundancy, connect each cable to a separate power source.
•
Note
For each power cable coming from a power source, connect it to the PIU as follows:
Step 9
Attach two negative input lugs to the negative posts on the rear side of the PIU (see callout 1 in
a.
Figure
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
5-18
5-12).
5-12).
5-12).
Be sure to consistently use one input color for negative connections and another input color for
positive connections.
5-13).
Chapter 5 Installing Power Supply Units
3
Place the positive power supply unit cable
lugs (2) on the front positive posts.
4
Fasten all four lugs with eight M6 nuts and
tighten to 40 in-lb (4.5 N·m).
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