118 Appendix F: The Matrox Iris GTR breakout board
Connecting a sourcing Matrox Iris GTR auxiliary output signal to a sinking
input of a device
If connecting to a sinking input of a third-party device, an output wire-terminal
(for example, OUT0) should be connected to a voltage source so that the auxiliary
output signal provides a sourcing output through the OUT_COM wire-terminal.
For this connection, set the OUT_COM selector switch (SW3) to OPEN.
Externally connect the +VDC_OUT wire-terminal to the OUT0 wire-terminal
on the output connector (J6) (as illustrated below). Then, connect the output
connector (J6) to your third-party device as follows:
Equivalent circuit only
Sinking device
COM
INPUT
Input
sensing
24V
+
–
Matrox Iris GTR breakout board
Sourcing configuration
-VDC
+VDC
max 150 mA
OUT_COM
+VDC_OUT
OUT0
Output connector (J6)
* In this example, the OUT_COM selector switch (SW3) is set to OPEN.
Note that, if an auxiliary output signal is acting as a sourcing output, the other
two outputs are not available.
B
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