National Instruments NI 1712 User Manual - page 37
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NI 17xx User Manual
Connecting a Light to the Direct Drive Lighting Controller
This section applies only to the following NI Smart Cameras:
•
NI 1752
•
NI 1754
Figure 4-1 illustrates how to connect a light to the Direct Drive lighting controller. Do
not
use
the GND signal when connecting a light to the Direct Drive lighting controller.
Figure 4-1.
Connecting a Light to the Direct Drive Lighting Controller
The Direct Drive controller performs an initialization sequence to achieve the requested current
output prior to acquiring the first image. You may notice a sequence of short flashes from the
light when the application initializes or shuts down.
External Lighting Controllers
This section applies only to the following NI Smart Cameras:
•
NI 1732
•
NI 1752
•
NI 1754
While the Direct Drive lighting controller is designed to handle common machine vision lighting
requirements, some applications require the use of a light with current or voltage requirements
beyond those supported by the Direct Drive. Other applications require more than one light. All
NI Smart Cameras support connections to third-party lighting controllers to solve these
applications.
The smart camera provides two types of external lighting outputs for synchronizing third-party
controllers to the exposure of the smart camera: a 5 V TTL strobe output and a 24 V strobe
output. The 5 V TTL strobe output is available for connecting to devices that require a 5 V signal.
The 24 V strobe output is powered by the voltage from the smart camera power supply and is
available for controllers that require higher voltage inputs. The 24 V strobe output is nominally
a 24 V output if 24 V power is supplied to the smart camera.
LED–
LED+
LED
NI 17xx
Direct
Drive