1. The response speed of the optocoupler is extremely fast, and its response delay time is US level, and the faster one is NS level.
2. Optocoupler can effectively suppress sharp pulses and various clutter interference in the transmission signal.
3. Optocoupler plays a very good role in safety protection. Even if an external device malfunctions or the input signal line is short-circuited, it will not affect other devices. At the same time, the optical input circuit and output circuit can withstand high voltages of several volts.
4. The signal is transmitted in one direction, and the input and output are completely electrically isolated. The output signal has no effect on the input terminal, and the anti-interference ability is strong.
5. There is no electrical connection between the input circuit and the output circuit of the optocoupler, and there is no common ground; The distributed capacitance is very small. The insulation resistance is very high. Therefore, it is difficult for various dry anti-clutters on one side of the loop to be transmitted to the other side through the optocoupler, thus avoiding the interference signal of common impedance coupling.
6. The clutter voltage entering the input of the optocoupler is relatively small, and can only form a very weak current. There is not enough energy for the diode to emit light, so the output is not affected.
