Connecting A 2-Wire Proximity Sensor To An Auxiliary Input Signal - Matrox Indio Installation And Hardware Reference

+
Up to 24V
–
Optional because the auxiliary input signals are optically isolated.
* The internal 2.2
Equivalent circuit only

Connecting a 2-wire proximity sensor to an auxiliary input signal

You can connect a 2-wire proximity sensor to a Matrox Indio auxiliary input signal
in either a sourcing or sinking configuration (that is, on a positive or negative
power wire). Note that in both cases, you will need to use the on-board 2.2 KOhm
bleeder resistor or an external bleeder resistor, to ensure that a minimum amount
of current flows into the proximity sensor in its on-state and in its off-state.
• For the auxiliary input signal to source the current (that is, to connect an auxiliary
input signal on a positive power wire), connect the 2-wire device to the auxiliary
input signal as shown below. To instantiate the on-board 2.2 KOhm bleeder
resistor, you must install a jumper on pins 2-3 of the auxiliary signal's input mode
connector. For different resistance, you must install an external bleeder resistor
between the AUX_IN+ pin and brown wire of the proximity sensor.
Sensing
Circuit
Matrox Indio input operating
in a sourcing configuration
K bleeder resistor is required to support 2-wire proximity sensors.
Ω
Connecting to the auxiliary I/O interface
AUX_IN+
Bleeder
Resistor
2.2 KOhm*
AUX IN _ –
Brown wire
Blue wire
2-wire proximity
sensor
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