Remove and Install the Current Sense Circuit Board for Frame 7

Replace a current sense circuit board with kit catalog number SK-RM-CSB-F7. Follow these steps to remove and install the current sense 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 protective guard. See Remove and Install the Protective Guard for Frame 7.
  5. Remove the LCL filter module from the enclosure.
  6. Remove the two M5 x 12 mm Torx screws that secure the J1 and J2 connector mounting plate to the protective cover on the back of the LCL filter module.
    example of how to remove the mounting plate screws from the protective cover on a frame 7 LCL filter module
  7. TIP: The 24V DC control power wire harness is routed through a grommet in the protective cover. You cannot remove the cover until the wire harness is pulled through the back side of the grommet.
  8. Remove the eight M5 x 12 mm Torx screws that secure the protective cover to the LCL filter module chassis and remove the cover partially from the module.
  9. To release the protective cover from the module fully, route the 24V DC control power supply wire harness (A) and connector P3 through the grommet on the cover.
    example of how to remove the protective cover from a frame 7 LCL filter module
  10. 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
  11. Without bending the cable to a radius less than 50 mm (2 in.), remove the fiber-optic cable from the transceiver in the LCL port on the current sense circuit board.
  12. Disconnect these connectors from the current sense circuit board:
    • P1 from J1
    • P4 from J4
    • P5 from J5
    • P6 from J6
    • P8 from J8
    • P13 from J13
    • P14 from J14 (this connector must be reused to maintain the rating of the LCL filter module)
  13. LCL filter module current sense board connections layout
  14. Remove the five M4 x 12 mm Torx screws that secure the current sense circuit board to the chassis and remove the board.
    example of how to remove the current sense circuit board from a frame 7 LCL filter module
  15. Install the current sense circuit board in the reverse order of removal.
  16. TIP: This illustration represents a fiber-optic transceiver port on an example circuit board only.
  17. Remove the protective cover from the LCL port on the new current sense circuit board.
    example of how to remove the cover from the fiber-optic transceiver port with XT protection
  18. Remove the new transceiver supplied with the kit from the packing materials.
  19. 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.
  20. Remove the protective covers from the transceiver.
    example of how to remove the covers from the ends of a fiber-optic transceiver with XT protection
  21. 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
  22. Insert the transceiver and fiber-optic cable into the port on the board, until you hear an audible ‘click.’
    example of how to insert a fiber-optic cable into a fiber-optic transceiver port
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