Example schematic of using PIR sensors, mechanical switches, reed switches:
Example schematic of connecting multiple sensors with open collector outputs:
Multiple sensors can be connected in parallel like in the schematic below. In this configuration any sensor will
activated the input. The example could be multiple motion sensors located in multiple places. If either of them will
sense motion, the configured event (for e.g. alarm) will be activated. This is suitable when you just need to know that
alarm is triggered but it is not necessary to know which sensor activated an alarm.
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