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Maintaining the PTX3000 Power System

Maintaining the PTX3000 Power System

Purpose

For optimum performance, verify the condition of the power supplies and grounding.

Action

On a regular basis:

  • Inspect the site to ensure that the grounding and power cables connected to the PTX3000 are securely in place and that no moisture is accumulating near the chassis. To review grounding and site wiring requirements for the PTX3000, see PTX3000 Chassis Grounding Cable and Lug Specifications.

  • Check the status of the power supplies by issuing the show chassis environment psm command.

  • Make sure that the DC power cables or AC power cords are arranged so that they do not obstruct access to other PTX3000 components.

  • Check the status LEDs on the PSM faceplates to verify that the power supplies are functioning normally. During normal operation:

    • The green OK LEDs are lit to indicate that the PSMs are functioning normally.

    • The green input 1 and input 2 LEDs on a PSM are lit when the input is receiving source DC power.

  • Check the red and yellow alarm LEDs on the craft interface. PSM failure or removal triggers an alarm that causes one or both of the LEDs to be lit. You can display the associated error messages by issuing the following CLI command:

    For a list of possible alarm messages, see Troubleshooting the PTX3000 Power Supply Modules.

  • The power supplies require an unobstructed airflow at both the front and rear of the chassis. Periodically check the site to ensure that both the air intake at the bottom front of the chassis and the exhaust from the power supply faceplates are unobstructed.

Replacing a PTX3000 AC PSM

Removing a PTX3000 AC PSM

To remove an AC PSM:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  2. Loosen the captive screw on the PSM, using a number 1 Phillips (+) screwdriver if necessary.
  3. Grasp the handle and pull to eject the PSM. Slide it halfway out of the chassis (see Figure 1).
    CAUTION:

    Each AC PSM weighs 4.5 lb (2.0 kg). Be prepared to support the full weight of the PSM as you remove it from the PTX3000.

  4. Place one hand underneath the PSM to support it and slide it completely out of the chassis.
    Figure 1: Removing an AC PSMRemoving an AC PSM

Installing a PTX3000 AC PSM

Each AC PSM weighs 4.5 lb (2.0 kg). To install an AC PSM (Figure 2):

  1. Using both hands, slide the PSM into the chassis until you feel resistance .
  2. Tighten the captive screw on the PSM.
  3. Verify that the input 1 and input 2 LEDs on the PSM faceplate are lit steadily, indicating that the PSM is receiving power.
  4. Verify that the OK LED on the PSM faceplate is lit steadily.
Figure 2: Installing an AC PSMInstalling an AC PSM

Replacing a PTX3000 DC PSM

Removing a PTX3000 DC PSM

To remove a DC PSM:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  2. Loosen the captive screw on the PSM, using a number 1 Phillips (+) screwdriver if necessary.
  3. Grasp the handle and pull to eject the PSM. Slide it halfway out of the chassis (see Figure 3).
    CAUTION:

    Each DC PSM weighs 4.6 lb (2.1 kg). Be prepared to support the full weight of the PSM as you remove it from the PTX3000.

  4. Place one hand underneath the PSM to support it and slide it completely out of the chassis.
    Figure 3: Removing a DC PSMRemoving a DC PSM

Installing a PTX3000 DC PSM

Each DC PSM weighs 4.6 lb (2.1 kg). To install a PSM (Figure 4):

  1. Using both hands, slide the PSM into the chassis until you feel resistance.
  2. Tighten the captive screw on the PSM.
  3. Verify that the input 1 and input 2 LEDs on the PSM faceplate are lit steadily, indicating that the PSM is receiving power.
  4. Verify that the OK LED on the PSM faceplate is lit steadily.
Figure 4: Installing a DC PSMInstalling a DC PSM

Replacing a PTX3000 DC Power Cable

Removing a PTX3000 DC Power Cable

Each DC power supply module (PSM) is hot-insertable and hot-removable, and weighs 4.6 lb (2.1 kg).

To remove a DC power cable:

  1. Switch off the customer-site circuit breakers to the input power tray that contains the DC power cable being removed.
  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. On the PSM faceplate, verify that the input 1 and input 2 LEDs are off on the PSM.
  3. On the PSM faceplate, switch the power switch for the PSM to the standby position ().
  4. Loosen the captive screw that secure the PSM to the chassis, using a number 1 Phillips (+) screwdriver if necessary.
  5. Remove the PSM from the chassis. See Figure 5.
    Figure 5: Removing the PSMRemoving the PSM
  6. Use a number 1 Phillips (+) screwdriver to loosen the screws on the input terminal cover.
  7. Remove the input terminal cover.
  8. Use a 10-mm nut driver to loosen the nuts, and remove the nuts from the DC power terminal stud.
  9. Remove the DC source power cable lug from the DC power terminal stud. See Figure 6.
Figure 6: Disconnecting a DC Source Power Cable LugDisconnecting a DC Source Power Cable Lug

Installing a PTX3000 DC Power Cable

To install a DC power cable:

  1. 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. Verify that the input 1 and input 2 LEDs on the PSM faceplate are off.
  2. On the PSM faceplate, switch the power switch for the PSM to the standby position. ().
  3. Secure the DC source power cable lug to the terminal with a nut.

    Use a 10-mm nut driver to tighten the nut.

  4. Replace the input terminal cover over the DC power cables.
  5. Verify that the source power cables are connected to the appropriate terminal: the positive (+) source cable to the return terminal (labeled RTN) and the negative (–) source cable to the input terminal (labeled –48V).
  6. Insert the PSM into the chassis.
    Figure 7: Installing a DC PSMInstalling a DC PSM