140 Appendix F: The Matrox Iris GTR breakout board
Output-to-ICS3 selector switch
The Output-to-ICS3 selector switch (SW8) allows you to specify whether you are
connecting auxiliary output 0 of your Matrox Iris GTR through the Matrox
Iris GTR breakout board’s ICS3 connector (J7) to a lighting controller that has
either a PNP pin (sinking input signal) or an NPN pin (sourcing input signal).
Switch Description
PNP Specifies that auxiliary output signal 0 be connected in a PNP topology, whereby the
connected, controlling auxiliary output signal 0 (via the PNP pin of the ICS3 connector (J7))
sources the current and the third-party input pin sinks the current.
NPN Specifies that auxiliary output signal 0 be connected in a NPN topology, whereby the
connected, controlling auxiliary output signal 0 (via the NPN pin of the ICS3 connector (J7))
sinks the current and the third-party input pin sources the current.
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