• Supported Platforms
• MX80 Routers

• Related Topics
• MX80 Power System Description
• Installing an MX80 DC Power Supply
• Preventing Electrostatic Discharge Damage to an MX80 Router
• MX80 Router DC Power Specifications
• DC Power Circuit Breaker Requirements for the MX80 Router
• DC Power Cable Specifications for the MX80 Router
• DC Power Source Cabling for the MX80 Router

Removing an MX80 DC Power Supply

Before you remove a power supply, be aware of the following:

Note: The minimum number of power supplies must be present in the router at all times.

Warning: Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.

Caution: To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a power supply or a blank panel. If you remove a power supply, you must install a replacement power supply or a blank panel shortly after the removal.

Note: After powering off a power supply, wait at least 60 seconds before turning it back on.

To remove a DC power supply (see Figure 1):

1. Switch off the dedicated customer site circuit breaker for the power supply being removed. Follow your site's procedures for ESD.
2. 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. Verify that the status LED on the power supply is not lit.
4. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
5. Move the DC circuit breaker on the DC power supply faceplate to the off (O) position.
6. Remove the clear plastic cover protecting the terminal studs on the faceplate (see Figure 2).
7. Remove the screw from each of the terminals. (Use a number 2 Phillips screwdriver.)
8. Remove the cable lugs from the terminals.
9. Carefully move the power cables out of the way.
10. Press the latch located on the left side of the power supply, to release it from the chassis.
11. Pull the power supply straight out of the chassis.