Connecting to the auxiliary I/O interface 43
Connecting an auxiliary output signal to a sinking input using an external
pullup resistor
To not lose two of the available three auxiliary output signals, you can connect an
auxiliary output signal to a sinking input as follows. Note that, in this
configuration, you will need to connect an external pullup resistor. Since your
Matrox Iris GTR auxiliary output signals can sink up to 50 mA, use the
documentation of your sinking device to calculate the required resistance for your
external pullup resistor (if necessary).
Equivalent circuit only
Optional because the auxiliary output signals are optically isolated.
Up to 24V
+
–
AUX_OUT
AUX_OUT_COMMON
Matrox Iris GTR
Sourcing configuration
Sinking device
COM
INPUT
Input
sensing
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