Disconnect DC Power from the Router

To disconnect DC power from the router, follow this procedure:

1. On the console or other management device connected to the Routing Engine, enter CLI operational mode and issue the following command to shut down the router software cleanly and preserve Routing Engine state information.
   user@host> request system halt

   Wait until a message appears on the console confirming that the operating system has halted.

   For more information about the command, see the JUNOS Internet Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and Management.

2. For each power supply, press the power switch on the power supply faceplate to the OFF (O) position.

   If you are power cycling the power supply rather than shutting it off for a time, wait at least 60 seconds after turning it off before turning it back on. If you need to power it off again, wait for at least 60 seconds after powering it on.

3. Shut off the power flowing from both external power sources, so that the voltage across the leads of the power cables is 0 V. Ensure that there is no chance that the cable leads might become active during the procedure.
4. Using a 3-mm flat-blade screwdriver, turn the screw on each quick-connect terminal counter-clockwise to loosen the terminal connector from around the cable.
5. Remove the cables from the terminal connectors and from the hook located on the faceplate to the right of the quick-connect terminals.
6. If you are decommissioning the router, loosen and remove the screw that secures the grounding cable to the chassis and remove the grounding cable.
7. Verify that the removed cables are not touching or blocking access to any router components.

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