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Optocoupler Isolation Circuits for Industrial Application

Optocoupler Isolation Circuits for Industrial Application. Optocuploare î n Aplica ţ ii Industriale. Down-link isolation takes a single optocoupler to pass a standard digital signal . Detecting the presence of the mains voltage requires ground isolation .

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Optocoupler Isolation Circuits for Industrial Application

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  1. Optocoupler Isolation Circuits for Industrial Application Optocuploare în Aplicaţii Industriale

  2. Down-link isolation takes a single optocoupler to pass a standard digital signal

  3. Detecting the presence of the mains voltage requires ground isolation Standard LED transmitter in optocouplers cuts half wave of the AC mains-voltage, i.e. optocoupler also rectifies the input voltage

  4. Controlling both pulses of the mains

  5. Low Current Sensing

  6. By-passing the sensor with the optocoupler transmitter allows higher current sensing

  7. Same function for AC voltage detection

  8. Threshold Detector plus Isolated Switch

  9. Overvoltages in mains voltage are common

  10. Voltage Surge

  11. Damped Sinusoidal Voltage Spike is Typical

  12. Current Dividing Allows Level Adjustment

  13. Filtering capacitor smooths possible voltage spikes

  14. Non-dissipative voltage divider saves power

  15. Bi-polar voltage clamp uses dedicated components

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