Assemble the DC Input Power Cable

Assemble one DC input power cable for each DC power input to your server.

1. Verify that the following conditions have been satisfied.

   The customer is responsible for satisfying these requirements.

   • Install a DC power source that meets the server’s input power specifications.

   • Secure DC power cables that meet the server’s power cabling specifications.

   • Attach the DC input plug to the DC input power cables. The input plug is provided in the server’s shipping kit.

2. If the power cables are already connected to a DC power source, de-energize the cables by removing fuses, opening circuit breakers, or turning off the DC source.

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   Caution - Do not proceed with these instructions until you are sure that there is no voltage present on the DC power cables.

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3. Identify the parts that you will use to assemble the DC input power cables.

   For each cable, you need the items shown in the following illustration. These items are included in the shipping kit that came with your server.

   
   

   Figure 16 DC Connection Parts

   

   Figure Legend

   1 strain relief housingStrain relief housing

   2 DC inputplugDC input plug

   3 cage clamp operating leverCage clamp operating lever

4. 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)

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     Note - Depending on the DC power source, the -48V or -60V (negative terminal) might be marked with a minus (-) symbol. The -48V or -60V Return (positive terminal) might be marked with a positive (+) symbol.

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5. Strip 5/16 in. (8 mm) of insulation from each of the wires coming from the DC power source.

   Do not strip more than 5/16 in. (8 mm) from each wire. Doing so leaves uninsulated wire exposed from the DC connector after the assembly is complete.

   
   

   Figure 17 Stripping the Insulation From the Wire

   

   Figure Legend

   1 5/16 in. (8 mm) maximum

6. Open the cage clamp for this section of the DC input plug by taking one of the following actions:

   • Insert the tip of the cage clamp operating lever into the rectangular hole directly above the hole in the DC input plug where you want to insert the first wire. Press down on the cage clamp operating lever.

   • Insert a small slotted screwdriver into the rectangular hole directly above the hole in the DC input plug where you want to insert the first wire, and push in to open the cage clamp.

   
   

   Figure 18 Opening the DC Input Plug Cage Clamp Using the Cage Clamp Operating Lever

   

   Figure Legend

   1 DC input plug

   
   

   Figure 19 Opening the Cage Clamp Using a Screwdriver

   

   Figure Legend

   1 DC input plug

7. Feed the exposed section of the appropriate wire into the round hole in the DC input plug.
   

   Figure 20 Connector Wiring Assignments

   

   Figure Legend

   1 Top of connector

   2 From -48V or -60V Return

   3 From chassis ground (green/yellow)

   4 From -48V or -60V

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   Note - If you need to remove a wire from the DC input plug, insert the cage clamp operating lever or a small screwdriver and pull the wire from the DC input plug.

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8. Release the lever or remove the tool to secure the wire into the connector.
9. Repeat the procedures for the other two wires to complete the assembly of the DC input power cable.
10. Repeat this procedure to create as many DC input power cables as you need for your unit.

Related Information

• Install the Strain Relief Housings