Remove and Install the Fiber Transceiver Circuit Board (XT) for Frames 7 and 8...15

Replace a fiber transceiver circuit board with kit catalog number 20-750-MFTB1-F8. Follow these steps to remove and install the fiber transceiver circuit board.
  1. Review the product advisories in Before You Begin.
  2. Remove power from the system.
  3. Open the enclosure door.
  4. Remove the control pod cover.
    fiber transceiver circuit board fiber-optic port identification
    Port Name
    Description
    ACP0
    Fiber transceiver port for the fiber-optic connection from ACP on the AC precharge control board.
    ACP1 / TAM
    Fiber transceiver port for the fiber-optic connection from ACP on the second AC precharge control board (frames 13…15 only) or the fiber-optic connection from TAM on the torque accuracy module. Frame 13…15
    PowerFlex®
     755TR drives and 755TM bus supplies cannot use a torque accuracy module (TAM).
    L0…L9
    Fiber transceiver ports for the fiber-optic connections from CNTL on the power layer interface board in power modules that are used as line side converters.
    M0…M9
    Fiber transceiver ports for the fiber-optic connections from CNTL on the power layer interface board in power modules that are used as motor side inverters.
  5. Remove the fiber-optic cables for the corresponding fiber transceiver circuit board from the cable management devices (A in the illustration) in the control pod.
    IMPORTANT: The minimum inside bend radius for fiber-optic cable is 50 mm (2 in.). Any bends with a shorter inside radius can permanently damage the fiber-optic cable. Signal attenuation increases as inside bend radius is decreased.
    fiber-optic cable bend radius example
  6. Loosen the two captive thumbscrews that secure the board and fiber-optic cables to the chassis and remove the board and cables.
    TIP: When all or many of the fiber-optic ports are used, it is easier to remove the fiber transceiver circuit board from the pod before removing the fiber-optic cables. However, it is possible to remove the fiber-optic cables without removing the boards.
    IMPORTANT: The edge connectors on a fiber transceiver circuit board with XT contain dielectric grease. If you do not intend to replace a fiber transceiver circuit board, do not touch the edge connectors on the board.
    example of how to remove a fiber transceiver circuit board from the control pod
    TIP: The control pod is shown separated from the enclosure to clarify the instructions only.
  7. For each fiber-optic cable, remove the cable (B) from the transceiver (C).
    IMPORTANT: The end of the transceiver that connects to the inside of the fiber port contains dielectric grease. Do not touch the end of the transceiver.
  8. For each fiber transceiver board, open the transceiver latch (D) and pull the transceiver out of the port connector on the board. Retain the transceiver for reuse.
    TIP: If the latch is obstructed and you cannot use your fingers to open it, use a small, screwdriver or other long, narrow tool to open the latch.
    example of how to remove the fiber-optic cables and transceivers from the fiber transceiver circuit board
  9. If used, remove the protective cover from the fiber-optic port on the fiber transceiver board.
    IMPORTANT: Circuit boards that are contained in renewal kits with XT contain dielectric grease on the edge connectors, where present. Do not touch or remove the grease from circuit board edge connectors. A non-greased connector can lead to corrosion.
    example of how to remove the protective cover from a fiber-optic port on the fiber transceiver board with XT
  10. Without bending the cable to a radius less than 50 mm (2 in.), fully insert the fiber-optic cable into the transceiver.
    example of how to insert a fiber-optic cable into a transceiver
  11. Insert the transceiver with fiber-optic cable into the port on the board, until you hear an audible ‘click.’
    example of how to insert a fiber transceiver with fiber-topic cable into the fiber port on the fiber transceiver board with XT
  12. Hold the tab on the protective cover and carefully remove the cover from the edge connector on the circuit board. Do not touch the edge connector.
    example of how to remove the protective cover from the edge connector on a fiber transceiver circuit board with XT
    IMPORTANT: If before you install the new board, grease is removed from an edge connector or is contaminated, do not install the circuit board. You must clean and reapply grease to the affected edge connector or connectors. See Clean and Apply Dielectric Grease to a Fiber Transceiver Edge Connector (XT).
  13. Install the fiber transceiver circuit board with fiber-optic cables in the reverse order of removal.
    IMPORTANT: Do not remove protective covers from wire harnesses, circuit board connectors, terminal blocks, and fiber-optic transceivers and ports unless used at the time of installation. For the product to meet the corrosive atmosphere rating, protective covers must remain installed in unused connectors during storage and operation.
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