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116 Appendix F: The Matrox breakout board
Routing a Matrox Iris GT auxiliary output signal to a third-party
device
You can route an auxiliary output signal from your Matrox Iris GT to a third-party
device. To do so, perform the following:
1. Connect the power, controlled-current output, and the digital I/O signals of your
Matrox Iris GT to the Matrox breakout board by following the steps in the
Powering and connecting to your Matrox Iris GT section, earlier in this appendix.
2. Connect an open-wire cable from the third-party device to the relevant
wire-terminal of the output connector. For more information, refer to the
Connecting an open-wire to a wire-terminal section, earlier in this appendix.
Note that when the auxiliary output signal is on, the circuit is grounded and
❖
the current flows from the connected device to your Matrox breakout box (the
observed voltage at the output pin will be low). When the auxiliary output
signal is off, the circuit is open (the observed voltage will be high if pulled high
by the connected circuitry). For more information, refer to the Connecting
external devices to auxiliary output signals section, in Appendix D: Using the I/O
signals and controlled-current output of Matrox Iris GT.
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