ALLIED Vision Technologies Prosilica GS2450 - Manual (Page 31)

Prosilica GS Technical Manual V2.0.5
31
Camera interfaces
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. Compare to the non-isolated trigger, In 1 has a longer prop-
agation 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 informa-
tion.
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:
Out 1 – opto-isolated
Out 1 is optically isolated and should be used in noisy environments. Out 1
requires a pull up resistor of greater than 1 KΩ to the user’s 5 V logic supply. Tie
Camera GND to Isolated IO GND to complete the external circuit. See
Camera I/
O opto-isolated user circuit example for more information.
Caution

Do not exceed 5.5 V on signal inputs unless otherwise
indicated.
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 trig-
ger 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