Mackie Digital 8-Bus Service Manual page 23

EXTRA CARD
One slot on the backplane is available for an extra digital I/O card, such as the PDI•8. It connects to
backplane connector J22 (in the ALT I/O slot). The signals to and from the DSP board pass through
backplane connector J48. There are 4 digital inputs and outputs, each carrying two data signals.
CARD TO WHAT THE SIGNAL
BACKPLANE IS CALLED ON
CONNECTOR THE BACKPLANE
AND PIN # AND DSP BOARD
J22-1,62 DT1_U9
J22-3,60 DT1_U10
J22-5,58 DT1_U11
J22-7,56 DT1_U12
CARD TO WHAT THE SIGNAL
BACKPLANE IS CALLED ON
CONNECTOR THE BACKPLANE
AND PIN # AND DSP BOARD
J22-2,61 DR1_U9
J22-4,59 DR1_U10
J22-6,57 DR1_U11
J22-8,55 DR1_U12
DIGITAL I/O CARD
One slot on the backplane is available for the standard digital I/O card. It connects to backplane
connector J30. The signals to and from the DSP board pass through backplane connector J21. Note that
once the digital signals reach the DSP board, they change name.
CARD TO WHAT THE SIGNAL
BACKPLANE IS CALLED ON
CONNECTOR THE BACKPLANE
AND PIN #
J30-1,62 DR
J30-2,61 DT
BACKPLANE
TO DSP BOARD
CONNECTOR
AND PIN NO.
These are the signals
J48-19
transmitted from the DSP
J48-23
board to the extra card.
J48-27
J48-31
BACKPLANE
TO DSP BOARD
CONNECTOR
AND PIN NO.
These are the signals
J48-21
transmitted from the extra
card to the DSP board
J48-25
J48-29
J48-33
BACKPLANE WHAT THE SIGNAL
TO DSP BOARD IS CALLED ON
CONNECTOR THE DSP BOARD
AND PIN NO.
J21-11 DT1_U13
J21-9 DR1_U13
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DSP SIGNAL FLOW