Cognex CDC Series Camera Description
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Cognex MVS-8100D and CDC Cameras Hardware Manual
Simultaneous Image Acquisition
You can chain together the triggers of two or more CDC series cameras in order to
generate simultaneous image acquisition on those cameras. To do so, wire the trigger
input of two or more cameras to the same external trigger input device. Make sure to set
your Cognex software to enable hardware triggering, and set the trigger filter properties
of each chained camera to the same values.
Trigger Delay Added by Opto-Isolation
The trigger input’s opto-isolation circuitry adds a small delay period between the
acceptance of the trigger pulse and the initiation of the image acquisition in the camera.
The size of the delay period varies with the trigger input voltage. This trigger delay
period is illustrated in Figure 29 and Table 24.
Figure 29. Delay added by trigger opto-isolation
Strobe Output Features
The strobe output is used to activate a photo strobe at the instant of image acquisition.
A pair of connections, and Strobe–, provide optically isolated outputs to a
strobe device. The strobe output signal is a pulse of 5 to 24 V peak-to-peak, depending
on your strobe device and wiring configuration.
DC Volts
T
DLH
(
µ
sec)
T
DHL
(
µ
sec)
5
8
9
12
3
18
24
< 3
> 18
Table 24. Delay added by trigger opto-isolation
Trigger–
T
DLH
T
DHL
Trigger
at camera
received
