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1-wire is an interface that allows you to build networks from devices with a common bus topology, one master - many slaves. Each device has its own unique 64-bit address.
When connecting end devices, such as switches, digital sensors, dangerous interference can occur on long lines, so we use additional protection and improvement of the inputs using optocouplers. By default, all devices with 12 inputs are configured in “Optocoupler” mode using jumpers . If you use interface or analog sensors on the controller inputs, do not forget to disable this mode.
The Atom series controllers give a possibility to connect DS18B20 temperature sensors to multifunctional inputs.