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Connecting the PTX3000 to Power

Connecting the PTX3000 Grounding Cable

You ground the PTX3000 by attaching a grounding cable to the chassis. You must provide the grounding cable. A 4-AWG cable lug is supplied with the PTX3000 for grounding the router. See PTX3000 Chassis Grounding Cable and Lug Specifications in the PTX3000 Packet Transport Router Hardware Guide for more information. You must install the PTX3000 in a restricted-access location and ensure that the chassis is always properly grounded. The PTX3000 has a two-hole protective grounding terminal provided on the chassis. See Figure 1. We recommend that you use this protective grounding terminal as the preferred method for grounding the chassis regardless of the power supply configuration. However, if additional grounding methods are available, you can also use those methods. For example, you can use the grounding wire in the AC power cord or use the grounding terminal or lug on a DC power supply. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

To ground the PTX3000:

  1. Gather the tools and parts required to ground the router:

    • Electrostatic discharge (ESD) grounding wrist strap

    • Grounding cable (which you must provide)

    • Grounding lug (one 4-AWG lug for grounding the router is provided with the PTX3000)

    • Two acorn nuts with washers (three acorn nuts are provided with the PTX3000)

  2. Attach an ESD grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site.
  3. Connect the grounding cable to a proper earth ground.
  4. Verify that a licensed electrician has attached the cable lug provided with the PTX3000 to the grounding cable.
  5. Ensure that grounding surfaces are clean and brought to a bright finish before you connect the grounding cable.
  6. Place the grounding cable lug over the grounding points (Figure 1).
  7. Secure the grounding cable lug to the grounding points, first with the washers, then with the acorn nuts.
  8. Verify that the grounding cabling is correct, that the grounding cable does not touch or block access to the PTX3000 components, and that it does not drape where people could trip on it.
Figure 1: Connecting the Grounding CableConnecting the Grounding Cable

Connecting Redundant AC Power to the PTX3000 AC Power Supply Modules

To connect the AC power cables to both AC PSM inputs for redundant power:

  1. Gather the following tools and parts:
  2. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  3. Switch the power switch on the PSM faceplate to the standby position ().
  4. Loosen the captive screw on the PSM, using the screwdriver if necessary.
  5. Grasp the PSM, and pull it out to remove it from the chassis.
    Figure 2: Removing an AC PSMRemoving an AC PSM
  6. Set the input switches for redundant power by setting both switches for input 1 and 2 to the on position (ON).
    Figure 3: Setting the Input Switches for Redundant PowerSetting the Input Switches for Redundant Power
      1
    —
    Input 1 switch ON
      2
    —
    Input 2 switch ON
  7. Insert the AC power cord couplers into input 1 and input 2 on the PSM (see Figure 4).
    CAUTION:

    One input on each AC PSM must be powered by a dedicated power feed derived from feed A, and the other input on each PSM must be powered by dedicated power feed derived from feed B.

    This configuration provides the commonly deployed A/B feed redundancy for the system. For example, you can connect input 1 on each AC PSM to feed A, and input 2 on each AC PSM to feed B.

    Figure 4: Connecting the AC Power Cords to a PSMConnecting the AC Power Cords to a PSM
  8. Insert the power cord plug into an external AC power receptacle.
  9. Reinstall the PSM into the chassis (see Figure 5), and tighten the captive screw to secure it.
    Figure 5: Installing an AC PSMInstalling an AC PSM
  10. Repeat the procedure for the remaining PSMs.
  11. Verify that the AC power cords do not drape where people could trip on them.

Connecting Nonredundant AC Power to the PTX3000 AC Power Supply Modules

Warning:

You must ground the router before connecting the router to power.

To connect AC power to the router:

  1. Gather the following tools and parts:

    • ESD grounding wrist strap

    • AC power cords , which should have a plug appropriate for your geographical location. See PTX3000 AC Power Cord Specifications for more information.

    • Phillips (+) screwdriver, number 2

  2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  3. Switch the power switch on the PSM faceplate to the standby position ().
  4. Loosen the captive screw on the PSM, using the screwdriver if necessary.
  5. Grasp the PSM, and pull it out to remove the PSM from the chassis. See Figure 6.
    Figure 6: Removing an AC PSMRemoving an AC PSM
  6. Set the input switches for nonredundant power by setting the switch for input 1 to the on position (labeled ON) and setting the switch for input 2 to the off position. See Figure 7.
    Figure 7: Setting the Input Switches for Nonredundant PowerSetting the Input Switches for Nonredundant Power
      1
    —
    Input 1 switch ON
      2
    —
    Input 2 switch OFF
    Figure 8: Connecting the AC Power Cords to a PSMConnecting the AC Power Cords to a PSM
  7. Insert the AC power cord coupler into input 1 on the PSM.
  8. Insert the AC power cord plug into external AC power receptacle.
  9. Reinstall the PSM into the chassis (see Figure 9), and tighten the captive screw to secure it.
    Figure 9: Installing an AC PSMInstalling an AC PSM
  10. Repeat the procedure for the remaining PSMs.
  11. Verify that the power cords do not drape where people could trip on them.

Connecting Redundant DC Power to the PTX3000 DC Power Supply Module

Warning:

You must ground the router before connecting the router to power.

To connect the DC source power cables to both DC PSM inputs for redundant power:

  1. Gather the following tools and parts:

    • Electrostatic discharge (ESD) grounding strap

    • 10-mm nut driver, for tightening nuts to the terminal studs

      CAUTION:

      You must use an appropriate torque-controlled tool to tighten the nuts. Applying excessive torque damages the terminal studs. The maximum torque that may be applied to this nut is 24 lb-in. (2.7 Nm).

    • Phillips (+) screwdriver, number 1

    • DC power cables, which you must provide

    • DC power lugs

  2. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.
  3. Attach an ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  4. Switch the power switch on the power supply module (PSM) faceplate to the standby position ( ).
  5. Loosen the captive screw on the PSM.
  6. Grasp the PSM, and pull it out to remove it from the chassis (see Figure 10). The DC PSM weighs 4.6 lb (2.1 kg).
    Figure 10: Removing a DC PSM Removing a DC PSM
  7. Set the switches for input 1 and input 2 to the on position (ON) for redundant power. See Figure 11.
    Figure 11: Setting the Input Switches for Redundant Power Setting the Input Switches for Redundant Power
      1
    —
    Input 1 switch ON
      2
    —
    Input 2 switch ON
  8. Use a number 1 Phillips (+) screwdriver to loosen the screws on the input terminal cover, and remove the input terminal cover.
  9. Remove the nuts from the DC power terminal studs.
  10. Install heat-shrink tubing insulation around the power cables.

    To install heat-shrink tubing:

    1. Slide the tubing over the portion of the cable where it is attached to the lug barrel. Ensure that tubing covers the end of the wire and the barrel of the lug attached to it.

    2. Shrink the tubing with a heat gun. Ensure that you heat all sides of the tubing evenly so that it shrinks around the cable tightly.

    Figure 12 shows the steps to install heat-shrink tubing.

    Note:

    Do not overheat the tubing.
    Figure 12: How to Install Heat-Shrink Tubing How to Install Heat-Shrink Tubing
  11. Connect the positive (+) DC source power cables to input 1 and input 2 RTN (return) input terminals (Figure 13 and Figure 14).
    CAUTION:

    One input on each DC PSM must be powered by dedicated power feeds derived from feed A, and the other input on each PSM must be powered by dedicated power feeds derived from feed B.

    This configuration provides the commonly deployed A/B feed redundancy for the system. For example, you can connect input 1 on each DC PSM to feed A, and input 2 on each DC PSM to feed B.
    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.

    Secure the positive (+) DC source power cable lugs to the RTN (return) terminals with a nut for each terminal. Use a 10-mm nut driver to tighten the nuts.

    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 24.0 lb-in. (2.7 Nm).
    Figure 13: DC PSM Inputs DC PSM Inputs
    Figure 14: Connecting the Positive DC Source Power Cable Lugs to a PSM Connecting the Positive DC Source Power Cable Lugs to a PSM
  12. Connect the negative (–) DC source power cables to input 1 and input 2 –48V input terminals (Figure 13 and Figure 15).

    Secure the negative (–) DC source power cable lugs to the –48V input terminals. Use a 10-mm nut driver to tighten the nuts.

    Figure 15: Connecting the Negative DC Source Power Cable Lugs to a PSM Connecting the Negative DC Source Power Cable Lugs to a PSM
  13. 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).
  14. Replace the input terminal cover over the DC power cables, and tighten the screws.
  15. Verify that both input 1 and input 2 LEDs on the PSM faceplate are lit steadily green, indicating that the inputs are receiving power.
  16. Reinstall the PSM into the chassis (see Figure 16), and tighten the captive screw to secure it.
    Figure 16: Installing a DC PSM Installing a DC PSM
  17. Repeat the procedure for the remaining PSMs.
  18. Verify that the DC power cables do not touch or block access to the components, and that they do not drape where people could trip on them.

See Also

Connecting Nonredundant DC Power to the PTX3000 DC Power Supply Modules

To connect the DC source power cables to either input 1 or input 2 on each DC PSM for nonredundant power:

  1. To connect the PTX3000 to DC power, you need the following tools and parts:

    • 10 mm nut driver, for tightening nuts to the terminal studs

      CAUTION:

      You must use an appropriate torque-controlled tool to tighten the nuts. Applying excessive torque damages the terminal studs. The maximum torque that may be applied to this nut is 24 lb-in. (2.7 Nm).

    • Phillips (+) screwdriver, number 1

    • DC power cables, which you must provide

    • DC power lugs

  2. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.
  3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  4. Switch the power switch on the PSM faceplate to the standby position. ().
  5. Loosen the captive screw on the PSM .
  6. Grasp the PSM, and pull it out to remove it from the chassis. The DC PSM weighs 4.6 lb (2.1 kg). See Figure 17.
    Figure 17: Removing a DC PSM Removing a DC PSM
  7. Use a number 1 Phillips (+) screwdriver to loosen the screws on the input terminal cover, and remove the input terminal cover.
  8. Remove the nuts from the DC power terminal studs.
  9. Set the input switches. See Figure 18.

    • Set the input switch for the input to be connected to ON.

    • Set the input switch for the input that will not be connected to the off position.

    For example, connect input 1 on a DC PSM. The input 2 on the DC PSM remains disconnected. The input switch for input 2 is set to off.

    Figure 18: Setting the Input Switches Setting the Input Switches
      1
    —
    Input 1 switch
      2
    —
    Input 2 switch
  10. Install heat-shrink tubing insulation around the power cables.

    To install heat-shrink tubing:

    1. Slide the tubing over the portion of the cable where it is attached to the lug barrel. Ensure that tubing covers the end of the wire and the barrel of the lug attached to it.

    2. Shrink the tubing with a heat gun. Ensure that you heat all sides of the tubing evenly so that it shrinks around the cable tightly.

    Figure 19 shows the steps to install heat-shrink tubing.

    Note:

    Do not overheat the tubing.
    Figure 19: How to Install Heat-Shrink Tubing How to Install Heat-Shrink Tubing
  11. Connect the positive (+) DC source power cable to either input 1 or input 2RTN input terminal. See Figure 20.
    CAUTION:

    One input on each DC PSM must be powered by a dedicated power feed for nonredundant power. To achieve this, connect the positive (+) source cable to the return terminal (labeled RTN) and the negative (–) source cable to the input terminal (labeled -48V). The other input remains disconnected.

    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.

    Secure the positive (+) DC source power cable lug to the RTN (return) terminal with a nut. Use a 10 mm nut driver to tighten the nut. See Figure 21.

    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 24.0 lb-in. (2.7 Nm).
    Figure 20: DC PSM Inputs DC PSM Inputs
    Figure 21: Connecting the Positive (+) DC Source Power Cable Lugs to a PSM RTN Input Connecting the Positive (+) DC Source Power Cable Lugs to a PSM RTN Input
  12. Connect the negative (–) DC source power cable to the other input—either input 1 or input 2 –48V (input) terminal.

    Secure the negative (–) DC source power cable lug to the –48V (input) terminal. Use a 10 mm nut driver to tighten the nut.

    Figure 22: Connecting the Negative (–) DC Source Power Cable Lugs to a PSM –48V Input Connecting the Negative (–) DC Source Power Cable Lugs to a PSM –48V Input
  13. 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).
  14. Replace the input terminal cover over the DC power cables, and tighten the screws.
  15. Verify that either the input 1 or the input 2 LEDs for the input on the PSM faceplate is lit steadily green, indicating that the input is receiving power.
  16. Reinstall the PSM into the chassis (see Figure 23), and tighten the captive screw to secure it .
  17. Repeat the procedure for all PSMs in the chassis.
  18. Verify that the DC power cables do not touch or block access to the components, and that they do not drape where people could trip on them.
Figure 23: Installing a DC PSMInstalling a DC PSM

See Also

Related Documentation