ALLIED Vision Technologies Prosilica GC2450 - Manual (Page 52)

Prosilica GC Technical Manual V2.0.8
52
Camera interfaces
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 – opto-isolated
In 1 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 1 has a longer
propagation time. It can be driven from 5 to 24 V with a minimum current
source of 10 mA. See
Camera I/O opto-isolated user circuit example for wiring
information.
In 2 – non-isolated
In 2 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 Signal GND to complete
the trigger circuit. See
Camera I/O non-isolated user circuit example for wiring
information.
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 2 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.