Connecting To An Inductive Load Device - Matrox Iris GT with MIL Manual

88 Appendix D: Using the I/O signals and controlled-current output of Matrox Iris GT

Connecting to an inductive load device

To connect your Matrox Iris GT to an inductive load device, you must first
connect a high-voltage diode between them. The diode protects your Matrox
Iris GT from over-voltage, which occur when the signal routed to the sinking
input (that is, the negative side of the load) of the inductive load device is turned
off.
You should connect the negative side of the load and a Matrox Iris GT output
signal to the anode of the external diode. In addition, you should connect the
cathode of the external diode to the positive side of the load. Connect the ground
of the inductive load device and the ground of your Matrox Iris GT to a common
ground.
Matrox Iris GT digital I/O
and power connector
AUX(USER)_OPENC_OUT6
1
Note that the output can sink up to
100 mA.
When the auxiliary output signal is enabled (on), the negative side of the load is
reduced to 0 V, and +V appears across the circuit.
External diode
Cathode
Anode
1
GND
Power
+V
source
Sinking
input
(negative side
of the load)
GND
Inductive load
device
o