Auxiliary, Multi-Purpose Signals - Matrox Indio Installation And Hardware Reference

Auxiliary, multi-purpose signals

Matrox Indio features an auxiliary I/O interface that can transmit and receive
optically isolated, digital, 24 V/TTL-level auxiliary signals; it supports 8 input
and 8 output auxiliary signals. The auxiliary I/O interface is controlled by an
advanced I/O engine. The auxiliary input signals can trigger functionality in the
engine (for example, a signal can trigger a timer in the engine). In addition, the
auxiliary input signals can cause software events or can be transmitted to
third-party devices over an auxiliary output signal. The auxiliary output signals
can output a signal generated in the advanced I/O engine (for example, a timer
output) or the state of a bit of one of the engine's registers (for example, the
user-output register which is set using software).
The advanced I/O engine includes:
• 16 timers that can be run in continuous or triggered mode and can use a selectable
clock source.
• Two rotary decoders that can decode quadrature input received from a rotary
encoder with quadrature output.
• Two I/O command lists that allow you to schedule commands to change the state
of a bit of an I/O command register at a specified time or counter value. You can
route the state of the bit to an auxiliary output signal to control a connected device
at a required moment; the state of each bit can be routed to any of the auxiliary
output signals or can be used, for example, to trigger a timer. You can use an I/O
command list, for example, when multiple parts are traveling between a sensor
and one or more ejector(s) and you need to schedule the ejection/redirection of
the different parts based on some analysis.
• An 8-bit user-output register that allows you to manually set the state of an
auxiliary output signal to transmit application-specific user output.
All auxiliary signals support voltages up to 24 V in sinking or sourcing
1
configurations .
1. Typically, for an auxiliary signal to source voltage, you must attach an external power
source to Matrox Indio. However, if you enable TTL mode for an auxiliary signal, it
can source up to 5 V without an external power source (through an on-board pullup
circuit connected to an isolated 5V power rail).
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