Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 342)

6-52 Component Definition and Maintenance
7000-UM150I-EN-P – June 2013 7000 “B” Frame
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 (2.0 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.