Maintaining the Power System in the Cisco cBR Chassis

Removing the AC Power Connections from the Cisco cBR Chassis


Warning

The chassis ground connection must always be made first and disconnected last.


Warning

Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Before You Begin

Required Tools and Equipment

  • #2 Phillips screwdriver

    Step 1   Power down the AC FPEM using the power switch.
    Step 2   Power down the AC circuit or power source to which the AC power cord is connected.
    Step 3   Loosen the Phillips-head screw on the cable retaining bracket using a #2 Phillips screwdriver.
    Step 4   Unplug the AC power cord from the receptacle on the AC FPEM.
    Figure 1. Removing AC Power Cord from the AC FPEM



    1

    Screw on the cable retaining bracket

    2

    AC power cord

    Step 5   Repeat Step 2 to Step 4 for each AC power connection.

    Removing the DC Power Connections from the Cisco cBR Chassis


    Warning

    The terminal block covers are an integral part of the safety design of the product. Do not operate the unit without the covers installed. Statement 1077


    Warning

    When you install the unit, the ground connection must always be made first and disconnected last. Statement 1046


    Warning

    Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003


    Warning

    Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

    Before You Begin

    Required Tools and Equipment

    • Torque wrench

    • 7/16" hex socket

      Step 1   Power down the DC FPEM using the power switch.
      Step 2   Power down the circuit or power supply to which the positive and negative lead cables are connected.
      Step 3   Remove the terminal block cover on the terminal block, from which you need to disconnect power, by pushing down on the bottom tab then pivoting the bottom out.
      Step 4   Loosen the 1/4-20 terminal bolts using a torque wrench and 7/16" hex socket and remove them. Disconnect the positive lead cable.
      Step 5   Loosen the 1/4-20 terminal bolts using a torque wrench and 7/16" hex socket and remove them. Disconnect the negative lead cable.
      Figure 2. Removing the DC Power Connection from the DC FPEM



      Step 6   Repeat Step 2 and Step 5 to disconnect each terminal block connection.
      Step 7   Insert the 1/4-20 terminal bolts and secure them using a torque wrench and 7/16" hex socket with a torque of 45-50 in-lb (5.08-5.65 Nm).
      Step 8   Reinstall the terminal block covers by clipping them on the top edge of the terminal block housing and then rotating them down until they snap into place.

      Removing the Power Module from the Cisco cBR Chassis

      Before You Begin

      • Attach an ESD-preventive wrist strap to your wrist and connect the other end to the grounding lug connected to the chassis.

      • Be aware of the weight and size of the equipment. Handle it with care.

      Restrictions

      • For the DC-powered Cisco cBR with N+1 redundancy, ensure that the chassis has at least five operational DC Power Modules for the chassis to be functional.

      • For the AC-powered Cisco cBR with N+1 redundancy, ensure that the chassis has at least four operational AC Power Modules for the chassis to be functional.

      • For the AC-powered Cisco cBR with 1+1 redundancy, ensure that the chassis has six operational AC Power Modules for the chassis to be functional.

      Required Tools and Equipment

      • ESD-preventive wrist strap

      • 3/16" flat-blade torque screwdriver

      • Antistatic bag

        Step 1   Loosen the two screws on the front power entry bezel using a 3/16" flat-blade torque screwdriver. Remove the front power entry bezel from the chassis.
        Figure 3. Removing the Front Power Entry Bezel from the Chassis



        Step 2   Loosen the screw on the Power Module using a 3/16" flat-blade torque screwdriver.
        Step 3   Pull the handle down to disengage the Power Module from the chassis.
        Step 4   Slide the Power Module out of its bay with one hand while supporting the base of the module with your other hand.
        Figure 4. Removing the Power Module



        Step 5   Place the removed Power Module in an antistatic bag.
        What to Do Next

        • Replace the Power Module (if required).

        • Position the front power entry bezel on the chassis. Insert and tighten the two screws using a 3/16" flat-blade torque screwdriver with a torque of 5-7 in-lb (0.56-0.79 Nm) to secure the bezel.

        Removing the FPEM from the Cisco cBR Chassis

        Before You Begin

        Required Tools and Equipment

        • ESD-preventive wrist strap

        • T10 Torx screwdriver

        • Antistatic bag

          Step 1   Loosen and remove the four #6-32 Torx-head screws on the mounting flanges of the FPEM using a T10 Torx screwdriver.
          Figure 5. Removing the FPEM from the Chassis



          Step 2   Slide the FPEM out of the chassis using the handles on either side applying even pressure to both handles.
          Step 3   Place the removed FPEM in an antistatic bag.
          What to Do Next

          Replace the FPEM (if required).

          Removing the Power Cassette Module from the Cisco cBR Chassis

          Before You Begin

          Required Tools and Equipment

          • 3/16" flat-blade torque screwdriver

          • T10 Torx screwdriver

            Step 1   Loosen the two screws on the front power entry bezel using a 3/16" flat-blade torque screwdriver. Remove the bezel from the chassis.
            Figure 6. Removing the Front Power Entry Bezel from the Chassis



            1

            Screw

            2

            Front power entry bezel

            Step 2   Loosen and remove the four #6-32 Torx-head screws on the Power Cassette Module using a T10 Torx screwdriver.
            Step 3   Hold the side flanges on the Power Cassette Module with both your hands. Pull and slide the module out of the chassis applying even pressure to both your hands.
            Figure 7. Removing the Power Cassette Module from the Chassis



            What to Do Next

            • Replace the Power Cassette Module (if required).

            • Position the front power entry bezel on the chassis. Insert and tighten the two screws using a 3/16" flat-blade torque screwdriver with a torque of 5-7 in-lb (0.56-0.79 Nm) to secure the bezel.