Matrox 4Sight EV6, Installation And Hardware Reference

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30 Chapter 2: Getting started with your Matrox 4Sight EV6 unit
Connecting to the auxiliary I/O interface
Matrox 4Sight EV6 has an auxiliary I/O interface composed of 16 electrically
isolated, industrial auxiliary signals that support sinking and sourcing
configurations. 8 are inputs that can receive 24 V, and 8 are outputs that support
up to 24 V.
Note that sinking and sourcing concepts refer to the conventional current flow ,
which means current flows from the positive potential towards the negative
potential. A sinking device provides a path to
sink current towards ground or to
the return path; a sinking device does not provide power. A sourcing device
provides a path that sources current; it provides a path from the power source. In
the following diagram, the device on the right is the sourcing device, and the device
on the left is the sinking device.
When setting up auxiliary I/O, be aware that you need to configure these pins on
the software side as well. Refer to the MIL help file for this information.
The signal names in this section are shortened to fit in the diagrams.
AUX_ISOIND_INn has been shortened to AUX_INn, and
AUX_ISOIND_OUTn has been shortened to AUX_OUTn.
Equivalent circuit only
Vcc
Sourcing
device
Sinking
device
+
+
-
-