Camera interfaces
AVT Prosilica GT Technical Manual
V2.0.8
57
Input triggers
Input triggers allow the camera to be synchronized to an external event. The
camera can be programmed to trigger on the rising edge, falling edge, both
edges, or level of the signal. The camera can also be programmed to capture an
image at some programmable delay time after the trigger event.
In 1 – non-isolated
In 1
is not electrically isolated and can be used when environmental noise is
inconsequential and faster trigger response is required. The required trigger
signal is
low voltage TTL 3.3 V.
Tie trigger ground to
Camera GND
to complete
the trigger circuit.
In 2 – opto-isolated
In 2
is optically isolated and can be used in electrically noisy environments to
prevent false trigger events. Tie trigger ground to
Isolated IO GND
to complete
the trigger circuit. Compared to the non-isolated trigger,
In 2
has a longer
propagation time. It can be driven from
5 to 24 V
with a
minimum current
source of 5 mA
.
Output signals
Output signals can be assigned to a variety of internal camera signals via soft-
ware. They can be configured to active high or active low. The internal camera
signals are listed as follows:
Caution
Exceeding 5.1 V on
In 1
can permanently damage the camera
Exposing
Corresponds to when camera is integrating light.
Trigger Ready
Indicates when the camera is ready to accept a trigger signal.
Trigger Input
A relay of the trigger input signal used to “daisy chain” the
trigger signal for multiple cameras.
Readout
Valid when camera is reading out data.
Imaging
Valid when camera is exposing or reading out.
Strobe
Programmable pulse based on one of the above events.
GPO
User programmable binary output.
