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One of the key competitive advantages of Atom series controllers is the use of multifunctional input ports.
This solution provides the ability to connect to controller's inputs: switches, sensors with output type "dry contact" (normally open, normally closed) or "open collector", sensors with 1-wire interface (up to 20 sensors per 1 input), analog sensors (temperature, humidity, lighting, etc.)
Dangerous interferences can occur when using switches and digital (binary) sensors on long lines. Therefore, it is necessary to use additional input protection with optocoupler mode. By default, all inputs are configured in Optocoupler (OP) mode using jumpers.