Assemble the DC Input Power Cords

1. Prepare as follows:
   1. Install a DC power source that meets the server's input power specifications.

      See Electrical Specifications.

   2. Obtain DC power cords that meet the server's power cabling specifications.

      See DC Power Source, Power Connection, and Grounding Requirements.

   3. Obtain a crimping tool or a soldering gun and supplies.
   4. Obtain heat-shrink tubing in colors matching the ground, positive, and negative cord designations.
2. Ensure that no DC power is present on the cords being installed.

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

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3. Route the power cords from the power source to the server.
4. Locate the three wires coming from your DC power source that will be used for the connections to your server.

   • -48V or -60V Return (positive terminal)

   • -48V or -60V (negative terminal)

   • Chassis ground

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   Note -  Depending on the DC power source, the positive terminal might be marked with a positive (+) symbol, and the negative terminal might be marked with a minus (-) symbol.

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5. Strip 1/2 in. (13 mm) of insulation from each of the wires.

   Do not strip more than 1/2 in. (13 mm) from each wire. Doing so leaves uninsulated wire exposed from the DC connector after the assembly is complete.

   
   

   No. Description 1 1/2 in. (13 mm) maximum

6. Using a Phillips screwdriver, remove the terminal housing cover.
   
7. Using a 7mm socket wrench or nut driver, remove the three ring load terminals and nuts.
   
8. Place heat-shrink tubing over the cords:
   1. Cut a 4 cm piece of heat-shrink tubing, then slide it over each input wire, using the corresponding color (ground, negative or positive) on each wire.
   2. Push the tubing at least 15 cm away from the end of the wire, so that crimping or soldering does not damage the tubing.
9. Insert the stripped end of a cord into the barrel of a ring terminal, then either crimp the barrel or solder the wire to the inside of the barrel.
10. Repeat the procedure for the other two wires.
11. Lower the heat-shrink tubing over each of the ring terminal barrels, then shrink fit the tubing with a heat gun.
12. Observing correct polarity designations for the attached cords, use the lug nuts to install the ring terminal barrels to the three terminal posts.
13. Verify that the cords are installed with the correct polarities.
14. Install the terminal housing cover.
    
15. Insert the completed power supply unit into the server.
    
16. Repeat this procedure to create as many DC power supply units as you need for your system.
17. Connect the DC power source.

    See Connect DC Power Source.

Related Information

• Connect the Chassis Ground Wire

• Assemble the DC Input Power Cords

• Power on the Server for the First Time