User Manual MV1-D1312(I) CameraLink®Series - Machine Vision

5 Hardware Interface5.1.3 Trigger and Strobe SignalsThe power connector contains an external trigger input and a strobe output.The trigger input is equipped with a constant current diode which limits thecurrent of the optocoupler over a wide range of voltages. Trigger signals canthus directly get connected with the input pin and there is no need for a currentlimiting resistor, that depends with its value on the input voltage. The inputvoltage to the TRIGGER pin must not exceed +15V DC, to avoid damage to theinternal ESD protection and the optocoupler!In order to use the strobe output, the internal optocoupler must be powered with 5 .. 15 V DC.The STROBE signal is an open-collector output, therefore, the user must connect a pull-upresistor (see Table 5.1) to STROBE_VDD (5 .. 15 V DC) as shown in Fig. 5.2. This resistor should belocated directly at the signal receiver.Figure 5.2: Circuit for the trigger input signalsThe maximum sink current of the STROBE pin is 8 mA. Do not connect inductiveor capacitive loads, such loads may result in damage of the optocoupler! If theapplication requires this, please use voltage suppressor diodes in parallel withthis components to protect the optocoupler.44