ALLIED Vision Technologies Prosilica GB2450 - Manual (Page 34)

Prosilica GB Technical Manual V2.0.5
34
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 Camera GND 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 more
information.
In 2 – non-isolated
In 2 is non-isolated and can be used when a faster trigger is required and when
environmental noise is inconsequential. The required signal is low voltage TTL
3.3 V. Tie Signal GND to Camera GND to complete the trigger circuit. See
Cam-
era I/O non-isolated user circuit example for more 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

Do not exceed 5.5 V on signal inputs unless otherwise indi-
cated
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