Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 397)

Component Definition and Maintenance 6-53
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
Fiber Optic Cabling
The equipment is provided with fiber optic cabling as a means of
interfacing the low voltage control to the medium voltage circuits.
The user of the equipment should never need to change the routing
of the fiber optic cables.
Each end of a fiber optic cable is provided with a connector that plugs
and latches into its respective location on a circuit board. To disconnect a
fiber optic cable, depress the ridged plastic tab at the end connector and
pull. To install a fiber optic cable, insert the fiber optic port of the circuit
board so that the plastic tab latches into place.
If the user finds it necessary to replace fiber optic cables, great care must
be taken to prevent the cables from becoming strained or crimped as a
resulting loss in light transmission will result in loss in performance.
The minimum bend radius permitted for the fiber optic cables is 50 mm
(2 inches).
When installing the fiber optic cable, the colour of the connector at the
end of the cable must match the colour of the connector socket on the
circuit board.
Lengths of fiber optic cables used in the product include:
Duplex Simplex
5.0 meter 5.0 meter
5.5 meter 6.0 meter
6.0 meter 10.0 meter
6.5 meter
7.0 meter
There is one duplex fiber optic for each thyristor, which manages gating
and diagnostic functions. The healthy status of the thyristor is determined
by the circuitry on the respective driver boards. This information is then
sent to the main processor via a fail-safe light signal in the fiber optic.
The firing command for the thyristor is initiated by the main processor
and transmitted to the appropriate gate driver board via the gating fiber
optic.
The color code of the connectors are:
• BLACK or GREY – is the transmitting end of the fiber optic.
• BLUE – is the receiving end of the fiber optic.