1. The plastic granulator tells you that all the input and output, whether the switching value or analog value, are photoelectric isolated. The optocoupler isolation of the switching value is relatively simple, and the electrical isolation of the analog value is relatively complex. Both cost and linearity should be considered. Then, we choose a circuit which is connected by two optocouplers in series and uses the symmetry of optocouplers to compensate, which not only ensures the accuracy, but also reduces the cost.
2. The plastic granulator tells you to use one point of grounding for analog and digital wiring on the printed circuit board, and try to ensure that no two ground wires are parallel. The digital circuit and analog circuit should be separated as far as possible to avoid mixed wiring.
3. В качестве управляющего источника питания используется импульсный источник питания с сильной защитой от помех -, который может обеспечить нормальную работу в диапазоне входного напряжения переменного тока 120 В - 27ov.
4. Arrange the signal line reasonably to reduce the line length as much as possible.
После принятия вышеуказанных мер эффект становится очевидным, и пластиковый гранулятор выдержал испытание на месте.