Must the automatic control system be equipped with signal isolator?

No matter what electrical control system, it may face complex environmental interference, overvoltage, short circuit, unknown pulse and other conditions. Therefore, the signal isolator has become an indispensable part of the control system by weakening the impact of environmental noise, protecting the subordinate control circuit, suppressing grounding or equipment interference, current, voltage limiting and protecting the input and output of the control system and the communication interface isolators.

First, eliminate a series of consequences caused by the potential difference.

Due to different models and different manufacturers of instruments and equipment, there is a certain potential difference between the signal points (which is unavoidable), the direct impact of the potential difference is to form a ground ring, interference in the transmission process or lead to signal distortion. In order to ensure the stable and reliable operation of the system, the grounding loop problem must be dealt with, and the use of the signal isolator is convenient and fast.

Second, solve the problem of signal mismatch before the equipment.

In devices that need a common communication connection but do not have a direct connection, if you want to connect is a very troublesome thing, or even impossible, this is because the signal output type and the received signal type of equipment can not be connected properly, using a durable signal isolator to achieve signal conversion can achieve device connection.

Three, so that one signal input is allocated to multiple signal output. Signal isolator