What is the working principle and function of the signal isolator？

How it works:

First of all, the signal of the transmitter or instrument is modulated and transformed through the semiconductor device, and then isolated and converted through the industrial electrical light or magnetic sensing device, and then demodulated and transformed back to the original signal before isolation, and the power supply of the isolated signal is isolated. Ensure the absolute independence of the transformed signal, power supply and ground.

Features:

One: Protect the lower control loop.

Two: Reduce the impact of environmental noise on the test circuit.

3: Inhibit the interference of common ground, frequency converter, solenoid valve and unknown pulse to the equipment; At the same time, the subordinate equipment has the function of limiting pressure and current, which is the faithful protection of transmitter, instrument, frequency converter, solenoid valve PLC/DCS input and output and communication interface. DIN series rail structure, easy to install, provides effective isolation: input, output and potential between the power supply and the ground. It can overcome the frequency converter noise and various high and low frequency pulsation interference.