We offer our preset counters with various output options: relay, transistor and optocoupler.
Relays should not be used when switching very small loads. Transistor or optocoupler outputs are better suited to operate the input of a controller.
The design of both outputs is basically almost the same. However with the optocoupler, galvanic isolation is achieved between the unit (counter) and the peripheral (controller) because of an LED and a phototransistor (in one housing).
As a rule, with the optocoupler output the emitter and the collector are brought out and may have to be switched externally. Using the appropriate circuit it is possible to achieve either negative polarity (normally closed function) or positive polarity (normally open function).
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