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42 Chapter 2: Getting started with your Matrox 4Sight GPm unit
NPN-sensing
sinking device
Equivalent circuit only
Connecting to a 3-wire NPN-compatible device
Connect Matrox 4Sight GPm to a 3-wire NPN-compatible device, as shown
below. In addition, connect the ground of the NPN-compatible device and the
ground of Matrox 4Sight GPm to a common ground.
The load is connected between the input of your Matrox 4Sight GPm and the
positive contact of the power supply.
up to 24 V
+
V+
External
resistor
4.7 KΩ
pull-up
Out
GND
All grounds on this unit share a common ground.
❖ Note that your NPN-sensing sinking device and your Matrox 4Sight GPm must
share a common ground.
Power source
Matrox 4Sight GPm
auxiliary I/O connector
In
GND
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