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Connecting to an inductive load device
To connect Matrox 4Sight GPm to an inductive load device, such as a traditional
relay, you must use a high-voltage diode to protect Matrox 4Sight GPm from
over-voltage, as shown below.
Matrox 4Sight GPm
auxiliary I/O connector
Outputs sink up to 100 mA.
All grounds on this unit share a common ground.
When the Matrox 4Sight GPm output signal is enabled, the negative side of the
load is reduced to 0 V, and 24 V appears across the circuit.
❖ Note that your inductive load device and your Matrox 4Sight GPm unit must
share a common ground.
Power source
External
diode
Output
signal
GND
Connecting to the auxiliary I/O interface
Inductive load device
up to
+
24 V
Cathode
Anode
(negative
side of the
load)
GND
Equivalent circuit only
39
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