NKT Photonics Koheras ACOUSTIK, Product Manual

Page: 39 / 96

39
Connecting the trigger input or output
Input trigger
When the trigger pin is set as an input, a positive active high signal applied to the
trigger pin enables emission. The diagram
Figure 16 shows a schematic of the
trigger input.
Figure 16 Trigger input circuit
Output trigger
When the trigger feature is sets the pin as an output, the trigger pin should be
connected to an external pull-up resistor. The diagram shown in
Figure 16 shows
a schematic of the trigger output circuit.
Figure 17 Trigger output circuit
Trigger signal
Based on the schematics of Figure 16 and Figure 17 , high and low voltage levels
can be calculated by the equations:
Vhigh = Vexternal
Vlow = Vexternal x 22k / (22k + R)