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en:hw:05-sensors:analog [2020/11/20 12:44]
jan_kozak
en:hw:05-sensors:analog [2021/08/10 06:53]
avsetula
Line 1: Line 1:
 ==%hide Analog ==    ==%hide Analog ==   
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 ====== Analog sensors ====== ====== Analog sensors ======
 Generally speaking, analog sensors utilize changes of **voltage**,​ **current** or **resistance** on output terminals. The sensors can be divided into two groups: Generally speaking, analog sensors utilize changes of **voltage**,​ **current** or **resistance** on output terminals. The sensors can be divided into two groups:
-  * __Active__ -> the output signal towards the GND is either voltage or current (most active sensors are powered by an external power source galvanically isolated from the PLC)+  * __Active__ -> the output signal towards the GND is either voltage or current (most active sensors are powered by an external power source galvanically isolated from the unit)
   * __Passive__ -> the resistance between the output terminals changes depending on the measured parameter.   * __Passive__ -> the resistance between the output terminals changes depending on the measured parameter.