Glossary
©
National Instruments Corporation
G-3
NI 177x Smart Camera User Manual
N
NI-IMAQdx
Driver software for National Instruments image acquisition devices and
NI 177x Smart Cameras. NI-IMAQdx is installed as part of NI Vision
Acquisition Software.
O
open collector
An output mechanism that grounds or does not ground a connection to a
powered device. An open collector output cannot supply voltage.
opto-coupled Optically
coupled.
optically coupled
An input mechanism that provides current protection by using a light
emitter to transmit signals to a light receiver, which then enables a signal
current.
P
pixel pitch
The distance between the centers of adjacent pixels in either the horizontal
or vertical direction.
PLC
Programmable Logic Controller. An industrial computer used for factory
automation, process control, and manufacturing systems.
pulse train
A signal consisting of a series of continuous pulses.
R
reference card
An object of a solid, neutral color (typically gray) in the image which
functions as a reference during image correction.
rising edge
The digital signal transition from the low state to the high state.
RS-232
Standard electrical interface for serial data communications.
