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FASTBUS AUXILIARY BOARD
The FSCC-VDAS/QPLUS Auxiliary Board is a custom version of the original FSCC-VDAS Auxiliary board. It will interface the FASTBUS Smart Crate Controller (FSCC a.k.a. Bi Ra Model 9101) with the FIFO system of the Video Data Acquisition System (VDAS) or the DART Data Acquisition System to allow data from the FSCC to the attached DAQ system. Figure 1 shows how data flows from the FSCC to flow to a DAQ buffer through the auxiliary board. The FSCC-VDAS/DART Auxiliary Board converts TTL level signals coming from the FSCC output port (FASTBUS Auxiliary connector) to RS485 level signals. The FSCC output port is a 195 pin FASTBUS standard 3 row connector containing 32 bits of data, and 7 control signals. Two twisted pair ribbon cables connect data and control signals on the auxiliary board to the DAQ system. A 50 pin ribbon cable for the lower 16 bits of differential data, control signals, and a 34 pin cable for the upper 16 bits of differential data. The upper and lower 16 bits of data can be subdivided between two connectors so that other systems that carry out only 16 bits of data could be interfaced to VDAS. Therefore, although this board will always interface 32 bits of data between FSCC and VDAS, the VDAS side will also be able to interface to other systems based on only 16 bits of data. The Model FRC (FASTBUS Readout Controller) Auxiliary Connector duplicated the FSCC’s Auxiliary Connector. Power is supplied by connection to the FSCC (or FRC) through the Auxiliary connector. This board requires +5 V @ 1 Amp.
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Bi Ra Systems,
Incorporated
2404 Comanche Road NE
Albuquerque, New Mexico 87107
Ph : 505-881-8887
Fax:505-888-0651