Fiber optic interface card BAP-1793

fiber optic interface card
fiber optic interface card
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BAP-1793 Fiber-Optic Interface Board for use with POW-R-PAK Driver Boards The AP-1793 three-phase fiber optic interface board provides a noise immune interface between a customer provided control board and a POW-R-PAK power stage. The PWM control signals from the control board to the fiber optic board (FOB) and the fault signals from the FOB to the control board are transmitted and received via fiber optic cables. This minimizes the effect of electrostatic and electromagnetic interference that is present in proximity to any hard-switched power electronics unit. The board contains six optical receivers (HFBR-2521), communicating at 5 Mbaud, each of which control the conduction status of the IGBT it controls. Light present at the receiver will turn on the associated IGBT. The IGBT will remain on until the light is removed or until a fault is detected by the POW-R-PAK gate drive board (GDB), at which point the GDB will latch off and annunciate the fault via the appropriate fiber optic transmitter (HFBR-1521). Light is present at the customer provided control board from the fiber optic transmitter on the FOB when there is no fault to be communicated. This creates a fail-safe condition that latches off the POW-R-PAK in the event of an unconnected fault signal.


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