Matrox Iris GT MIL Installation And Technical Reference page 115

Matrox Iris GT auxiliary output 4 (AUX(STB)_OPENC_OUT4) is a
pulse-width modulated signal (PMW, strobe-pulse) that produces a series of pulses
that have a duty cycle proportional to the intensity setting in your MIL program.
Matrox Iris GT
digital I/O &
power connector
AUX(STB)_OPENC_OUT4
1. Note that the output can sink up to 100 mA.
For more information on setting the intensity of the lighting device, refer to
MdigControl in the MIL Reference.
+V
External
pull-up
resistor
1
GND
Connecting external devices to auxiliary output signals
+V
+V
+
-
Digital In
GND
Light
controller
115
+
Lighting
-
device