Cisco NCS 4201 Руководство по установке - Страница 33

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Installing the Cisco NCS 4201

Preventing Power Loss

Use the following guidelines to prevent power loss to the chassis:

• To prevent loss of input power, ensure that the total maximum load on each circuit supplying the power

• In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types

Use the information in the table Cisco NCS 4201 Specifications to estimate the power requirements and heat

dissipation of a Cisco NCS 4201 based on a given configuration of the chassis. Determining power requirements

is useful for planning the power distribution system needed to support the chassis.

Activating a DC Power Supply

Perform the following procedure to activate a DC power supply:

Step 1

Remove the tape from the circuit-breaker chassis handle, and restore power by moving the circuit-breaker chassis handle

to the On (|) position.

Step 2

Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1) is green.

Step 3

If the LEDs indicate a power problem, see

Step 4

If you are connecting a redundant DC power supply, repeat these steps for the second power source.

If you are connecting a redundant DC power supply, ensure that each power supply is connected to a separate

Note

power source in order to prevent power loss during a power failure.

Activating an AC Power Supply

Perform the following procedure to activate an AC power supply:

Step 1

Plug the power cord into the power supply.

Step 2

Connect the other end of the power cord to an AC-input power source.

Step 3

Verify power supply operation by checking if the respective power supply front panel LED (PS0 or PS1) is green.

Step 4

If the LEDs indicate a power problem, see

Step 5

If you are connecting a redundant AC power supply, repeat these steps for the second power source.

Note

If you are connecting a redundant AC power supply, ensure that each power supply is connected to a separate

power source in order to prevent power loss in the event of a power failure.

supplies is within the current ratings of the wiring and breakers.

that use ferroresonant technology. These UPS types can become unstable with systems such as the Cisco

NCS 4201, which can have substantial current-draw fluctuations due to bursty data traffic patterns.

Troubleshooting

Power Connection Guidelines

chapter.

chapter for troubleshooting information.

Cisco NCS 4201 Hardware Installation Guide