Glossary - Matrox Breakout Box Installation And Technical Reference

34 Appendix A: Glossary

Glossary

• Auxiliary signal.
An auxiliary signal is a user-defined I/O signal that can have one or more additional
functions. For example, a signal that can be both an exposure signal, and a
user-defined input signal, is an auxiliary signal.
• Duty cycle.
The duty cycle is the ratio between the pulse duration and the period of a
rectangular waveform (the period of the pulse-train).
• Illuminators.
Illuminators provide light so that an object or a surface can be captured by a
camera. Examples of common illuminators are ring LEDs and strobe lights.
• Inductive load devices.
Inductive load devices are devices that have inductive properties (inductive
reactance), such as a relay or a motor. Devices connected to an inductive load
device require a diode to protect them from over-voltage. Over-voltage typically
occurs when the inductive load device starts or when the connected device
disconnects.
• Lighting controllers.
Lighting controllers control illuminators. A strobe light is typically controlled by
a lighting controller.
• NPN-compatible PLC devices.
NPN-compatible PLC devices include all forms of external devices that are
programmable logic controllers with NPN transistor types. An NPN-compatible
PLC device has an input that is enabled when it is grounded (sinking input). An
NPN-compatible PLC device does not provide power to the connected device.