The similarities and differences between signal isolators and isolated distributors

What is the difference between a power distribution isolator and a signal isolator? Under what circumstances do you use a signal isolator, and under what circumstances do you use a power distribution isolator? 　 　Distribution isolators are used to isolate power supplies and electrical equipment from being started by incorrect operations An isolating switch to avoid accidents, improper use of the switch is only for isolation, it can also be a knife, air switch, circuit breaker, universal circuit breaker, etc.　　Signal isolator: It belongs to the majors related to electronics, electrical, electronic information, and communication. There are many types. In these majors, we talk about signals referring to changing currents, voltages, shocks, and magnetic fields. There are two types of digital signals and analog signals.　　 One: It is also a way to filter a certain frequency and waveform power signal and only let the pure power pass through, such as rectification and filtering. Two: If only the signal is allowed to pass and no current is passed, it is also a kind of data transmission to convert the electrical signal into an optical signal. The equipment power supply of the upper level and the next level are completely isolated and will not be interfered by the upper level power supply, such as optical fiber communication, etc. .　　3: Another example is the optical coupling network of the switching power supply, the power supply voltage stabilization sampling, and the feedback signal of oscillation using optical coupling to transmit high and low voltage isolation to reduce the failure rate and improve the safety factor. The classification of signal isolator is divided into active isolator and passive isolator according to whether an external power supply is needed; according to the input signal type, it can be divided into: current input analog signal isolator, voltage output analog signal isolator, thermal resistance input isolator , Thermocouple input isolator, switch isolator, etc. According to the channel structure, it can be divided into: single channel, dual channel, one input and two output, etc. The difference between passive, active isolators and distribution isolators First of all, the essential difference between passive signal isolators and active signal isolators is that passive signal isolators do not need a separate external power supply, while active signal isolators are The power distribution isolator needs to provide a separate power supply (24VDC or 220VAC). What they have in common is that they can solve the interference problem caused by the common 'ground' between the devices. The development trend of signal isolators: miniaturization, intelligence, and low power consumption.