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116 Appendix D: Using the I/O signals and controlled- current output of Matrox Iris GT
Powering and controlling a LED lighting
device with the Matrox Iris GT
controlled-current output
You can power and control a LED lighting device with the controlled-current
output of your Matrox Iris GT. Note, to connect to a light controller, see the
Connecting a light controller to an auxiliary output signal subsection of the
Connecting external devices to auxiliary output signals section, earlier in this
appendix.
❖ Unlike the auxiliary output signals, the Matrox Iris GT controlled-current output
(CCS) sources the current for a LED lighting device. Matrox Iris GT allows you
to control the amount of current (mA) that is transmitted when the
controlled-current output is enabled (ON), allowing you to control the intensity
of the LED lighting device. Matrox Iris GT can provide up to 500 mA of current.
MIL allows you to specify a value for the intensity, which maps to a value between
0 and 500 mA, in 256 steps. For more information, refer to MdigControl in the
MIL Reference.
Refer to the documentation that came with your LED lighting device to learn the
recommended amount of current to send.
Connect your Matrox Iris GT controlled-current output directly to the LED
lighting device's positive terminal for the current (+). Connect the ground of your
Matrox Iris GT and the ground of the LED lighting device to a common ground.
The LED lighting device activates when the controlled-current output is enabled
(ON).
Matrox Iris GT
digital I/O &
power connector
LED
CCS
+
lighting
-
GND
device
GND
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