11.1 wxPropView 107
Figure 36: External trigger signal
Schematic shows how to fit application's switch to camera's digital input. External trigger signal must be in following
conditions:
• TTL (5 V): High min. 3 V, Low max. 1 V
• PLC (24 V): High min. 12 V, Low max. 10 V
Application's switch can be a mechanical one any light barrier or some kind of encounter.
Note
Depending on used switch it might be necessary to use a pull-up or pull-down resistor so that camera input
can recognize signal correctly.
See also
Characteristics of the digital inputs (p. 45)
To test the general trigger functionality, please follow these steps:
1. Select the "Acquisition Mode" "Continuous".
2. Click on "Acquire".
3. Set the "TriggerMode" to "OnHighLevel".
4. Set the "TriggerMode" to "DigitalInputThreshold" to e.g. 2V.
5. Connect a standard power supply with e.g. 5 V (higher than the value of "DigitalInputThreshold") to pin 1 (-)
and pin 6 (+)
As long as the power supply is connected, you can see a live preview. If you disconnect the power supply the live
preview should stop. If this is working the trigger input works.
MATRIX VISION GmbH
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