Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 384)

6-94 Component Definition and Maintenance
7000-UM150I-EN-P – June 2013 7000 “B” Frame
Fiber Optic Interface Boards
The Fiber Optic Interface (FOI) Boards are the interface between the
Drive Control Boards and the Gate Driver circuitry. The drive control
decides which device to fire, and sends an electrical signal to the FOI
boards. The FOI board converts that electrical signal to an optical
signal, which is transmitted via fiber optics to the gate driver cards.
Typically, the Transmit ports are Black and the Receive ports are
Blue. The gate driver accepts that signal and turns the device on and
off accordingly. The diagnostic fiber optic signals work the same
way, but the source is the gate driver boards and the destination is
the drive control boards.
Figure 6.67 – Fiber Optic Interface Board
The FOI boards are mounted directly on the DCBs using two parallel
14-pin connectors for the electrical connection, and plastic clips to
provide the mechanical strength. Each FOI board can handle the
Firing and Diagnostic duplex fiber optic connector for 6 devices,
whether they are SCRs or SGCTs. Physically, on the Drive Control
Boards, there is provision for 18 devices for the inverter and the
rectifier. This is enough capacity to handle the highest rated drive
that we currently produce. The top FOI board on the DCB is for the
„A‟ devices, the middle FOI board on the DCB is for the „B‟ devices,
and the bottom FOI board on the DCB is for the „C‟ devices.