National Instruments NI 1712 User Manual - page 36
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Chapter 4
Connecting Lighting and External Devices
Selecting a Light
This section applies only to the following NI Smart Cameras:
•
NI 1752
•
NI 1754
National Instruments software provides support for a variety of lights from major machine vision
lighting companies. However, if your light is not in the list of supported lights, you may still be
able to use your light with the Direct Drive lighting controller.
To determine if your light is compatible with the NI Smart Camera, verify the following:
•
The light is current controlled and not voltage controlled.
•
The smart camera can provide enough current to obtain the desired illumination from the
light.
•
The maximum voltage drop specified for the light does not exceed the specified range of
the smart camera. Under some circumstances, some LEDs, particularly certain lights with
white and blue LEDs, require a higher voltage drop than usual to turn on or reach full
brightness. Such lights may be incompatible with the smart camera. These lights may need
to be reconfigured by the manufacturer to bring the voltage drop within the specified range
of the smart camera.
•
The minimum voltage drop specified for the light does not fall below the specified range of
the smart camera. Under some circumstances some LEDs, particularly certain lights with
infrared LEDs and lights with only one LED per string, present a lower voltage drop than
usual and may be incompatible with the smart camera. These lights may need to be
reconfigured by the manufacturer to bring the voltage drop within the specified range of the
smart camera.
Note
The voltage drop of a light can vary significantly with environmental
conditions, such as ambient temperature, current supplied, and strobe time.
Refer to Appendix A,
Specifications
, for complete specifications for the Direct Drive lighting
controller.