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Replacing the DC Power Supply Cable on a Junos Space Appliance

Ensure that you have the following parts and tools available to remove the power supply cable from the appliance chassis:

  • (Optional) ESD grounding strap

  • Phillips (+) screwdriver, number 2

  • An antistatic bag or an antistatic mat

Note:

If only one power supply module is installed in your appliance, you must power off the appliance before removing the power supply cable.

This topic has the following sections:

Removing the DC Power Supply Cable

To remove a DC power supply cable from a Junos Space appliance, do the following:

  1. (Optional) Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an external ESD point.
  2. Switch off the external circuit breakers, if they are present, for all the cables attached to the power supply module. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process.
  3. Remove the clear plastic cover over the terminal studs on the faceplate.
  4. Remove the screws from the terminals, using a Phillips screwdriver, number 2 to loosen and remove the screws. Save the screws.
  5. Remove the cable lugs from the terminals.
  6. Remove the screw from the grounding terminal using a Phillips screwdriver, number 2 to loosen and remove the screw. Save the screw.
  7. Remove the grounding lug from the terminal.
  8. Carefully remove the power cable from the DC power source.
    Note:

    Ensure that the cable is not touching or in the way of any components, and that it does not drape where people could trip on it.

Connecting the DC Power Supply Cable

To connect a DC power supply cable to a Junos Space appliance, do the following:

  1. (Optional) Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an external ESD point.
  2. Switch off the external circuit breakers, if they are present, for all the cables attached to the power supply. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process.
  3. Remove the clear plastic cover over the terminal studs on the faceplate.
  4. Attach the power cable to the DC power source. For more information on how to connect the DC power cables to the appliance, see the Connecting DC Power to the Junos Space Appliance topic.
  5. Replace the clear plastic cover over the terminal studs on the faceplate.
  6. Connect the grounding lug to the grounding terminal.
  7. Switch on the external circuit breakers, if they are present, for all the cables attached to the power supply.

The Junos Space Appliance starts powering on when you supply power to the power supply module. If the power supply module is correctly installed and functioning normally, the LED on the power supply module displays green when the power supply module is powering the appliance, and amber when the power supply module is in standby mode (not powering the appliance).

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