Connecting External Devices To The Input Signals Of The Auxiliary I/O Interface - Matrox 4Sight GPm Installation And Hardware Reference

Connecting to the auxiliary I/O interface 41
Connecting external devices to the input signals
of the auxiliary I/O interface
You can connect a wide variety of external devices (such as proximity detectors)
to the sinking input signals of the Matrox 4Sight GPm auxiliary I/O interface. An
input signal of Matrox 4Sight GPm must be connected to the device's output.
Each of the input signals of Matrox 4Sight GPm is able to accept input voltages
ranging from 0 V to 24 V. When using an input voltage above 5 V, however, we
recommend adding a 4.7 KΩ serial resistor to the Matrox 4Sight GPm inputs.
Each of the input signals of Matrox 4Sight GPm is TTL-compatible. The
Matrox 4Sight GPm input signals will be enabled (on) when the voltage applied
is greater than 2.4 V. The Matrox 4Sight GPm input signals will be disabled (off )
when the voltage is lower than 0.8 V.
Important Voltage from external devices connected to the auxiliary I/O interface connector
should not exceed 24 V.
For details regarding signal characteristics, see the Auxiliary I/O interface section,
in Appendix B: Technical reference.