Maintaining the XRE200 Power System

Removing an AC or DC Power Supply from an XRE200 External Routing Engine

You can install two AC or DC power supplies in an XRE200 External Routing Engine. You can remove and replace a single AC or DC power supply without powering off the external Routing Engine or disrupting external Routing Engine functions.

Before you remove a power supply from the external Routing Engine:

• Ensure you understand how to prevent electrostatic discharge (ESD) damage. See Prevention of Electrostatic Discharge Damage.

Ensure that you have the following parts and tools available to remove a power supply:

• Electrostatic discharge (ESD) grounding strap

To remove a power supply from the external Routing Engine (see Figure 1):

1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
2. If you are removing an AC power supply, disconnect the power cord from the AC appliance inlet on the AC power supply faceplate.

   If you are removing a DC power supply, disconnect the (-) DC power source cable -48V (input) from the power supply, then disconnect the positive (+) DC power source cable RTN (return) from the same power supply.

3. Push the power supply faceplate latch to the right while pulling the power supply away from the external Routing Engine to release the ejector lever. Stop pulling the power supply once the lever is released.
4. Taking care not to touch power supply components, pins, leads, or solder connections, place one hand under the power supply to support it. Grasp the power supply handle with your other hand and pull the power supply completely out of the chassis.

Figure 1: Removing a Power Supply from an XRE200 External Routing Engine (AC Power Supply Pictured)

Installing an AC or DC Power Supply in an XRE200 External Routing Engine

You can install two AC or DC power supplies in an XRE200 External Routing Engine. You can remove and replace a single AC or DC power supply without powering off the external Routing Engine or disrupting external Routing Engine functions.

Before you install a power supply:

• Ensure you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

Ensure that you have the following parts and tools available to install a power supply:

• Electrostatic discharge (ESD) grounding strap

To install a power supply in the external Routing Engine (see Figure 2):

1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
2. If the power supply slot has a power supply in it that needs to be removed, remove the power supply. See Removing an AC or DC Power Supply from an XRE200 External Routing Engine.
3. Taking care not to touch power supply components, pins, leads, or solder connections, remove the new power supply from its bag.
4. With one hand on the faceplate handle and the other hand on the bottom of the power supply to support its weight, slide the power supply straight into the power supply slot until the power supply is approximately halfway to the back of the external Routing Engine.
5. Remove your hand from the bottom of the power supply.
6. Gently slide the power supply straight into the chassis until the power supply is almost fully seated in the slot. The power supply will reach a point where backpressure will prevent the power supply from going further into the slot; do not force the power supply fully into the slot at this point of the procedure.
7. Use your thumb to move the ejector lever at the top of the power supply faceplate to the right, and push the power supply flush into the back of the chassis. Release the lever.

Figure 2: Installing a Power Supply in an XRE200 External Routing Engine (AC Power Supply Pictured)