Assemble the DC Input Power Cables
- Turn off power from the DC power source using the circuit breakers.
Caution - Do not proceed with these instructions until you have turned off the power
from the DC power source through the circuit breakers.
- Identify the parts that you will use to assemble the DC input power
For each cable, you need the three parts shown in the figure below.
These items are provided in the shipping kit that came with your server.
Figure 38 DC Connection Parts
1 strain relief housingStrain relief housing
2 DC input plugDC input plug
3 cage clamp operating leverCage clamp operating lever
- Locate the three wires coming from the DC power source that will be
used in the connection to your unit:
- -48V or -60V (negative terminal)
- Chassis ground
- -48V or -60V Return (positive terminal)
Note - Depending on the DC power source, the -48V or -60V (negative terminal) might
be marked with a minus (-) symbol, and the -48V or -60V Return
(positive terminal) might be marked with a positive (+) symbol.
- Strip 5/16 inches (8 mm) of insulation from each of the wires coming
from the DC power source.
Do not strip more than 5/16 inches (8 mm) from each wire. Doing
so leaves uninsulated wire exposed from the DC connector after the assembly is
Figure 39 Stripping the Insulation From the Wire
1 Cable stripped to 5/16 in., or 8mm
- Open the cage clamp for this section of the DC input plug by
taking one of the following actions:
- Feed the exposed section of the appropriate wire into the round hole in
the DC input plug.
Figure 42 Connector Wiring Assignments
1 Top of connector
2 From -48V or -60V return
3 From chassis ground (green/yellow)
4 From -48V or -60V
Note - If you need to remove a wire from the DC input plug, insert
the cage clamp operating lever or a small screwdriver as described in Step 5,
and pull the wire from the DC input plug.
- Release the lever or remove the tool to secure the wire into the
- Repeat Step 5 and Step 7 for the other two wires to complete the assembly
of the DC input power cable.
- Repeat this procedure to create as many DC input power cables as you
need for your unit.