Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
ON THIS PAGE
 

Maintaining the PTX5000 DC Power System

Maintaining the PTX5000 DC Power System

Purpose

For optimum performance, verify the condition of the power distribution units (PDUs), power supply modules (PSMs), DC power cables, and grounding cables.

Action

On a regular basis:

  • Periodically inspect the site to ensure that the grounding and DC power cables connected to the PTX5000 are securely in place and that no moisture is accumulating near the PTX5000. To review grounding and site wiring requirements for the PTX5000, see PTX5000 Chassis Grounding Cable and Lug Specifications and Site Electrical Wiring Guidelines.

  • Check the status of the PDUs by issuing the show chassis environment pdu command.

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

  • Routinely check the status LEDs on the PDU and PSM faceplates and the craft interface to verify that the power system is functioning normally.

    During normal operation of the 60-A and 120-A DC PDU and PSM:

    • The green PDU OK LEDs light to indicate that the PDUs are functioning normally.

    • Each green DC IN LED on a 60-A DC PDU lights when the input is receiving source DC power.

    • Each green –48 V 120 A LED on a 120-A DC PDU lights when the input is receiving source DC power.

    • Each SW ON LED on a 60-A DC PDU lights when the input power switch is on.

    • Each CB ON LED on a 120-A DC PDU lights when the circuit breaker is on.

    • The green INPUT OK LED on a power supply module lights when the PSM is receiving voltage.

    • The green OUTPUT OK LED on a power supply module lights when the circuit breaker on the PDU is on.

    During normal operation of the High Capacity DC PDU and PSM:

    • The green PDU OK LEDs light to indicate that the PDUs are functioning normally.

    • Each green PSM LED, PSM_0 through PSM_7 on a PDU, lights when the input is receiving appropriate source DC power.

    • The green INPUT1 OK LED on a power supply module lights when the input 1 of the PSM is receiving voltage.

    • The green INPUT2 OK LED on a power supply module lights when the input 2 of the PSM is receiving voltage.

    • The green OUTPUT OK LED on a power supply module lights when power supply output is functioning normally.

    For more information about the PDU and PSM LEDs, see PTX5000 DC Power Distribution Unit LEDs and PTX5000 DC Power Supply Module LEDs.

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

    For a list of possible alarm messages, see Troubleshooting the PTX5000 Power System.

  • The power system requires 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 PSM faceplates are unobstructed.

  • To check the power usage in watts for all PDUs and PSMs, issue the show chassis power command .

    Issue the show chassis power detail command to check the power usage in watts for hardware components such as FPCs, fan trays, Routing Engine and Control Board, and SIB, CCG, and craft interface.

Replacing a PTX5000 60-A DC PDU

Removing a PTX5000 60-A DC PDU

The PTX5000 has two redundant, load-sharing PDUs. Each PDU is hot-insertable and hot-removable. The PDU weighs 60 lb (27.2 kg). Each input power tray weighs 1.6 lb (0.7 kg).

To remove a 60-A DC PDU:

  1. Switch off the customer-site circuit breakers to the PDU being removed.
  2. Move the OUTPUTpower switch on the PDU to the off (O) position.
  3. 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. Verify that the –48 V 120 A LEDs on the PDU faceplate are off.
  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 at the front of the chassis.
  5. Remove the PSMs in the front of the chassis from the PDU being removed
  6. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis at the back of the PTX5000.
  7. Switch all input power switches on the PDU faceplate to the off (O) position.
    Note:

    After powering off a PDU, you must wait at least 60 seconds before turning it back on.

  8. Loosen the captive screws that secure the input power trays to the PDU.
  9. Remove each input power tray from the PDU.
    Figure 1: Removing the 60-A Input Power TrayRemoving the 60-A Input Power Tray
    Note:

    It is not necessary to remove the power cables from the input power trays when you are replacing the PDU.

  10. Loosen the four captive screws attaching the PDU handle to the PDU and chassis.
  11. Grasp the handle on the PDU faceplate and pull firmly down toward you. Slide the PDU halfway out of the chassis (see Figure 2).
    Figure 2: Removing a 60-A DC PDURemoving a 60-A DC PDU
  12. Place one hand underneath the PDU to support it and slide it partly out of the chassis until you can reach the two handles located on each side of the PDU.
  13. Use the two handles on each side of the PDU to support it and slide the PDU completely out of the chassis.
Warning:

Do not touch the power connectors on the rear of the PDU. They can contain dangerous voltages.

CAUTION:

Each PDU weighs approximately 60 lb (27.2 kg). Be prepared to support the full weight of the PDU as you remove it from the PTX5000.

CAUTION:

Do not leave a PDU slot empty for more than a short time while the PTX5000 is operational. For proper airflow, the PDU must remain in the chassis or a blank panel must be used in an empty slot.

Installing a PTX5000 60-A DC PDU

Each PDU weighs approximately 60 lb (27.2 kg). The input power tray weighs 1.6 lb (0.7 kg). To install a PDU:

  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 during installation.
  2. Verify that the input power switches on the PDU faceplate of the replacement PDU are in the OFF position (O).
  3. Verify that the DC IN LEDs on the PDU faceplate are off.
  4. Remove the input power trays from the replacement PDU. Store the input power trays.
  5. Using both hands, slide the PDU into the chassis until you feel resistance (see Figure 3).
    Figure 3: Installing a 60-A DC PDUInstalling a 60-A DC PDU
  6. Push the metal handle up toward the PDU.
  7. Tighten the captive screws on the metal handle. Use a Phillips (+) screwdriver.
  8. Slide the input power trays into the new PDU (Figure 4).
    Figure 4: Installing a 60-A Input Power TrayInstalling a 60-A Input Power Tray
  9. Tighten the captive screws on the input power tray. Use a Phillips (+) screwdriver.
  10. Reinstall the PSMs at the front of the chassis.
  11. Switch on the customer-site circuit breakers.
  12. Verify that the DC IN LEDs on the PDU faceplate are lit steadily, indicating that the inputs are receiving power.
  13. Move the input power switch on the PDU to the on (|) position.
  14. Verify that the SW ON LEDs are lit steadily, indicating that the input power switch for each input power tray is on.
  15. Verify that the PDU OK LED on the PDU faceplate is lit steadily, indicating that the PDU is correctly installed and is functioning properly.

Replacing a PTX5000 60-A DC PDU Power Cable

Removing a PTX5000 60-A DC PDU Power Cable

Each 60-A DC PDU has eight input power trays. Each input power tray is hot-insertable and hot-removable, and weighs 1.6 lb (0.7 kg).

To remove a 60-A DC power cable (see Figure 6):

  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 PDU faceplate, verify that the DC IN LEDs are off for both inputs in the input power tray being removed
  3. On the PDU faceplate, switch the input power switch for the input power tray to the off (O) position.
  4. Loosen the captive screws that secure the input power tray to the PDU.
  5. Remove the input power tray from the PDU.
    Figure 5: Removing the Input Power TrayRemoving the Input Power Tray
  6. Use a Phillips (+) screwdriver to loosen the screw on the metal input power tray cover.
  7. Open the metal input power tray cover.
  8. Loosen the cable restraints.
  9. Use a 7/16-in. (11-mm) nut driver to loosen the nuts, and remove the nuts from the DC power terminal stud.
  10. Remove the DC source power cable lug from the DC power terminal stud.
Figure 6: Disconnecting the 60-ADC Source Power Cable Lugs from an Input Power TrayDisconnecting the 60-ADC Source Power Cable Lugs from an Input Power Tray

Installing a PTX5000 60-A DC PDU Power Cable

To install a 60-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 DC IN LEDs on the PDU faceplate are off.
  2. On the PDU faceplate, switch the input power switch for the input power tray to the off (O) position.
  3. Route the DC source power cable lug through the cable restraint.
  4. Secure the DC source power cable lug to the terminal with a nut (see Figure 8 and Figure 9).

    Use a 7/16-in. (11-mm) nut driver to tighten the nut.

  5. Tighten the cable restraint over the DC power cables.
  6. 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).
  7. Close the input power tray cover, and secure it with the screw.
  8. Insert the input power tray into the PDU.
    Figure 7: Installing a 60-A Input Power TrayInstalling a 60-A Input Power Tray
Figure 8: 60-A DC Input Power Terminals60-A DC Input Power Terminals
Figure 9: Connecting the 60-A DC Source Power Cable Lugs to an Input Power TrayConnecting the 60-A DC Source Power Cable Lugs to an Input Power Tray

Replacing a PTX5000 120-A DC PDU

Removing a PTX5000 120-A DC PDU

The PTX5000 has two redundant, load-sharing PDUs. Each PDU is hot-insertable and hot-removable. The PDU weighs 60 lb (27.2 kg). Each input power tray weighs 1.6 lb (0.7 kg).

To remove a PDU:

  1. Switch off the customer-site circuit breakers to the PDU being removed.
  2. Move the power switch on the PDU to the off (O) position.
  3. 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. Verify that the –48 V 120 A LEDs on the PDU faceplate are off.
  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 at the front of the chassis.
  5. Remove the PSMs in the front of the chassis from the PDU being removed
  6. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis at the back of the PTX5000.
  7. Switch the circuit breakers on the PDU faceplate to the off (O) position.
    Note:

    After powering off a PDU, you must wait at least 60 seconds before turning it back on.

  8. Loosen the captive screws that secure the input power trays to the PDU.
  9. Remove each input power tray from the PDU.
    Figure 10: Removing a 120-A Input Power TrayRemoving a 120-A Input Power Tray
    Note:

    It is not necessary to remove the power cables from the input power trays when you are replacing the PDU.

  10. Loosen the four captive screws attaching the PDU handle to the PDU and chassis.
  11. Grasp the handle on the PDU faceplate and pull firmly down toward you. Slide the PDU halfway out of the chassis (see Figure 11).
    Figure 11: Removing a 120-A DC PDURemoving a 120-A DC PDU
  12. Place one hand underneath the PDU to support it and slide it partly out of the chassis until you can reach the two handles located on each side of the PDU.
  13. Use the two handles on each side of the PDU to support it and slide the PDU completely out of the chassis.
Warning:

Do not touch the power connectors on the rear of the PDU. They can contain dangerous voltages.

CAUTION:

Each PDU weighs approximately 60 lb (27.2 kg). Be prepared to support the full weight of the PDU as you remove it from the PTX5000.

CAUTION:

Do not leave a PDU slot empty for more than a short time while the PTX5000 is operational. For proper airflow, the PDU must remain in the chassis or a blank panel must be used in an empty slot.

Installing a PTX5000 120-A DC PDU

Each PDU weighs approximately 60 lb (27.2 kg). The input power tray weighs 1.6 lb (0.7 kg). To install a PDU:

  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 during installation.
  2. Verify that the –48 V 120 A LEDs on the PDU faceplate are off.
  3. Switch the circuit breakers on the PDU faceplate to the OFF position (O).
  4. Remove the input power trays from the replacement PDU. Store the input power trays.
  5. Using both hands, slide the PDU into the chassis until you feel resistance (see Figure 12).
    Figure 12: Installing a 120-A DC PDUInstalling a 120-A DC PDU
  6. Push the metal handle up toward the PDU.
  7. Tighten the captive screws on the metal handle. Use a Phillips (+) screwdriver.
  8. Slide the input power trays into the new PDU (Figure 13).
    Figure 13: Installing a 120-A Input Power TrayInstalling a 120-A Input Power Tray
  9. Tighten the captive screws on the input power tray. Use a Phillips (+) screwdriver.
  10. Reinstall the PSMs at the front of the chassis.
  11. Switch on the customer-site circuit breakers.
  12. Verify that the –48 V 120 A LEDs on the PDU faceplate are lit steadily, indicating that the inputs are receiving power.
  13. Switch the circuit breakers on the PDU to the on (|) position.
  14. Verify that the CB ON LEDs are lit steadily, indicating that the circuit breaker for each input power tray is on.
  15. Verify that the PDU OK LED on the PDU faceplate is lit steadily, indicating that the PDU is correctly installed and is functioning properly.

Replacing a PTX5000 120-A DC PDU Power Cable

Removing a PTX5000 120-A DC PDU DC Power Cable

Each PDU has eight input power trays. Each input power tray is hot-insertable and hot-removable, and weighs 1.6 lb (0.7 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. Verify that the –48 V 120 A LEDs on the PDU faceplate are off.
  3. Switch the circuit breaker for the input power tray on the PDU faceplate to the off (O) position.
  4. Loosen the captive screws that secure the input power tray to the PDU.
  5. Remove the input power tray from the PDU.
    Figure 14: Removing the Input Power TrayRemoving the Input Power Tray
  6. Use a Phillips (+) screwdriver to loosen the screw on the metal input power tray cover.
  7. Open the metal input power tray cover.
  8. Loosen the cable restraints.
  9. Use a 7/16-in. (11-mm) nut driver to loosen the nuts, and remove the nuts from the DC power terminal stud.
  10. Remove the DC source power cable lug from the DC power terminal stud.
Figure 15: Disconnecting the DC Source Power Cable Lugs to an Input Power TrayDisconnecting the DC Source Power Cable Lugs to an Input Power Tray

Installing a PTX5000 120-A DC PDU 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 –48 V 120 A LEDs on the PDU faceplate are off.
  2. Switch the circuit breaker for the input power tray on the PDU faceplate to the off (O) position.
  3. Route the positive (+) DC source power cable lug through the left cable restraint.
  4. Secure the positive (+) DC source power cable lug to the RTN (return) terminal, located on the left, with a nut.

    Use a 7/16-in. (11-mm) nut driver to tighten the nut.

  5. Route the negative (–) DC source power cable lug through the right cable restraint.
  6. Attach the negative (–) DC source power cable lug to the –48V (input) terminal, located on the right.

    Use a 7/16-in. (11-mm) nut driver to tighten the nut.

    CAUTION:

    You must use an appropriate torque-controlled tool to tighten the nuts. Applying excessive torque damages the terminal studs and power supply. The maximum torque that may be applied to this nut is 99 lb-in. (11 Nm).

    CAUTION:

    You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply.

    CAUTION:

    All inputs on the DC PDU in slot PDU0 must be powered by dedicated power feeds derived from feed A, and all inputs on the DC PDU in slot PDU1 must be powered by dedicated power feeds derived from feed B. This configuration provides the commonly deployed A/B feed redundancy for the system.

    Figure 16: Connecting the DC Source Power Cable Lugs to a 120-A Input Power TrayConnecting the DC Source Power Cable Lugs to a 120-A Input Power Tray
  7. Tighten the cable restraint over the DC power cables.
  8. 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).
  9. Close the input power tray cover, and secure it with the screw..
  10. Insert the input power tray into the PDU.
    Figure 17: Installing a 120-A Input Power TrayInstalling a 120-A Input Power Tray

Replacing a PTX5000 60-A or 120-A DC PSM

Removing a PTX5000 60-A or 120-A DC PSM

To remove a 60-A or 120-A DC PSM:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the captive screws on the door covering the PSM and open the door.
  3. Loosen the captive screw on the PSM ejector handle.
  4. Grasp the ejector handle and pull to eject the PSM. Slide it halfway out of the chassis (see Figure 18).
    CAUTION:

    Each DC PSM weighs approximately 10.6 lb (4.8 kg). Be prepared to support the full weight of the PSM as you remove it from the PTX5000.

  5. Place one hand underneath the PSM to support it and slide it completely out of the chassis.
    Figure 18: Removing a PSMRemoving a PSM

Installing a PTX5000 60-A or 120-A DC PSM

Each DC PSM weighs approximately 10.6 lb (4.8 kg). To install a 60-A or 120-A DC PSM:

  1. Using both hands, slide the PSM into the chassis until you feel resistance .
  2. Actuate the ejector handle to insert the PSM into the chassis.
  3. Tighten the captive screw on the PSM.
  4. Verify that the INPUT OK LED on the PSM faceplate is lit steadily, indicating that the PSM is receiving power.
  5. Verify that the OUTPUT OK LED on the PSM faceplate is lit steadily.

Replacing a PTX5000 High Capacity DC PDU

Removing a PTX5000 High Capacity DC PDU

The PTX5000 has two redundant, load-sharing PDUs. Each PDU is hot-insertable and hot-removable. The High Capacity DC PDU weighs 64.5 lb (29.3 kg) without PSMs.

To remove a High Capacity DC PDU:

  1. Switch off the customer-site circuit breakers to the PDU being removed.
  2. Move the power switch to the standby () position.
    Note:

    After powering off a PDU, you must wait at least 60 seconds before turning it back on.

  3. 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.
  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. In the front of the chassis, remove the PSMs that are installed in he PDU you plan to replace. See Replacing a PTX5000 High Capacity DC PSM for details.
  6. Remove the power cables from the power terminal block.
    CAUTION:

    Before removing the power input cables, verify that power is turned off. You can take the help of a licensed electrician to remove the cable lugs and the DC power input cables connected to the PDU.

  7. Loosen the four captive screws attaching the PDU handle to the PDU and chassis.
  8. Grasp the handle on the PDU faceplate and pull firmly down toward you. Slide the PDU halfway out of the chassis (see Figure 19).
    Figure 19: Removing a High Capacity DC PDURemoving a High Capacity DC PDU
  9. Place one hand underneath the PDU to support it and slide it partly out of the chassis until you can reach the two handles located on each side of the PDU.
  10. Use the two handles on each side of the PDU to support it and slide the PDU completely out of the chassis.
Warning:

Do not touch the power connectors on the rear of the PDU. They can contain dangerous voltages.

CAUTION:

Each PDU weighs approximately 64.5 lb (29.3 kg). Be prepared to support the full weight of the PDU as you remove it from the PTX5000.

CAUTION:

Do not leave a PDU slot empty for more than a short time while the PTX5000 is operational. For proper airflow, the PDU must remain in the chassis or a blank panel must be used in an empty slot.

Installing a PTX5000 High Capacity DC PDU

Each High Capacity DC PDU without the PSMs weighs approximately 64.5 lb (29.3 kg). To install a PDU:

  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 during installation.
  2. Verify that power switch on the PDU is in the standby () position.
  3. Verify that the DC power input cables are disconnected.
  4. Using both hands, slide the PDU into the chassis until you feel resistance (see Figure 20).
    Figure 20: Installing a High Capacity DC PDUInstalling a High Capacity DC PDU
  5. Push the metal handle up toward the PDU.
  6. Tighten the captive screws on the metal handle. Use a number 2 Phillips (+) screwdriver.
  7. Connect the DC input power cables to the DC power terminal blocks. See Connecting Power to the PTX5000 High Capacity DC PDUs for details.
  8. Install the PSMs at the front of the chassis. See Replacing a PTX5000 High Capacity DC PSM for details.
  9. Switch on the customer-site circuit breakers.
  10. Move the input power switch on the PDU to the on (|) position.
  11. Verify that the PDU OK LED on the PDU faceplate is lit steadily, indicating that the PDU is correctly installed and is functioning properly.

Replacing a PTX5000 High Capacity DC PSM

Removing a PTX5000 High Capacity DC PSM

To remove a High Capacity DC PSM:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the captive screws on the door covering the PSMs and open the door.
  3. Press down the locking tab and then pull out the PSM by using the ejector handle.
    CAUTION:

    Each High Capacity DC PSM weighs approximately 10.1 lb (4.6 kg). Be prepared to support the full weight of the PSM as you remove it from the PTX5000.

  4. Place one hand underneath the PSM to support it and slide it completely out of the chassis.
    Figure 21: Removing a High Capacity DC PSMRemoving a High Capacity DC PSM

Installing a PTX5000 High Capacity DC PSM

The High Capacity DC PSMs are smaller in dimensions compared to the first-generation PSMs. So, you must install the PSM sleeves to install the High Capacity DC PSMs in the chassis. See Installing the High Capacity PSM Sleeves for details. Each High Capacity DC PSM weighs approximately 10.1 lb (4.6 kg).

To install a High Capacity DC PSM:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Using both hands, slide the PSM into the chassis until you feel resistance.
    Figure 22: Installing a High Capacity DC PSMInstalling a High Capacity DC PSM
  3. Press the ejector handle to insert the PSM into the chassis until is it fully seated.
  4. Verify that the Input 1 OK LED on the PSM faceplate is lit steadily, indicating that the PSM is receiving power.
  5. Verify that the Input 2 OK LED on the PSM faceplate is lit steadily, indicating that the power output is steady.

Related Documentation