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• Disconnecting Power Cables to a DC-Powered M10i Router    

• Related Topics
• Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series Router
• M10i DC Power Supply Description
• M10i Router Power Requirements
• Maintaining the M10i Power Supplies
• Troubleshooting the M10i Power System

Disconnecting Power Cables to a DC-Powered M10i Router

To disconnect DC power cables from the router:

1. On the console or other management device connected to the master Routing Engine, enter CLI operational mode and issue the following command to shut down the router software. (If two Routing Engines are installed, also issue the command on the backup Routing Engine.)
   
   

   user@host> request system halt

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

   For more information about the command, see the JUNOS System Basics and Services Command Reference.

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

   Note: 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 number 1 Phillips screwdriver, turn the screw on each field-wiring terminal counter-clockwise to loosen the terminal connector from around the cable lug.
5. Remove the cables from the terminal connectors and from the hook located on the faceplate to the right of the field-wiring terminals.
6. Verify that the removed cables are not touching or blocking access to any router components.