Procedure
Step 1
Install the DC power supply in the chassis, making note of the bay number, so you are sure to connect the
wiring to the appropriate terminals on the DC PDU at the chassis rear.
Step 2
Verify that power is off to the DC circuit or circuits on the power supply that you are installing.
Step 3
Ensure that all site power and grounding requirements have been met.
Step 4
Remove the plastic cover from the DC terminals by squeezing the flanges at the top and bottom of the cover.
Step 5
Connect the ground wires to the power supply terminal block, shown as a green wire below. Only one ground
connection is required, though there may be up to four DC connections.
Step 6
Connect the DC-input wires to the power supply terminal block. The proper wiring sequence is positive to
positive (red wire), and negative to negative (black wire). The figure below shows a connection to terminal
1.
The positive and negative wires can be installed pointing either to the right or to the left as long as
the terminal cover is used. The figure below shows them pointed to the right. Panduit LCD4-14A-L
connectors may be used for the supply and return wires, and Panduit LCD4-14AF-L or equivalent
connectors may be used for the 90-degree ground lug wire. Both connections have double lugs with
.25 inch holes measuring .625 inches from center to center.
Figure 35: Connecting DC Power to the Chassis (shows DC PDU only, Chassis is Omitted)
Note
Cisco UCS 5108 Server Chassis Installation Guide
57
Installation
Connecting a DC Power Supply
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