What are the main types of signal isolators

Signal isolator is connected to the industrial production field instrument and the main control room in the middle of the electrical equipment, according to the power supply, input, output of the middle of the reliable protection, reasonable processing of industrial automation automatic control system field impact problems, in order to ensure the smooth and reliable operation. According to the different requirements of the site, the key is divided into signal isolator, distributor and safety grid.

Signal isolator: In order to improve the working capacity of the instrument load and ensure the mutual influence of the instrument connected with the same data signal, and improve the electrical safety characteristics, it is necessary to use the signal isolator to collect, enlarge, calculate and solve the anti-interference data signals such as the input working voltage, current flow or frequency, and resistor. Re-output protected current flow or operating voltage data signals for safe output to secondary instrumentation or plc\dcs applications.

Distributor: Industrial production site generally must use two wire transmission technology, the distributor not only for the intelligent transmitter and other primary instruments to produce 24V power distribution equipment, in addition to the input of the current flow data signal to collect, increase, calculate, and carry out anti-interference solution, and then output protection of the current flow and working voltage data signal, for the secondary instruments or other instruments behind the application.

Safety grid: Some unique industrial production sites must not only be transmitted by two lines, but also show that the power supply of the distribution equipment has a data signal protection effect, and must also have the characteristics of safety fire explosion-proof type. The safety grid can reliably resist the output power of the power supply, avoid the ignition in the middle of the power supply, data signal and ground, overcurrent protection, voltage reduction two-way limit data signal and power control loop, and limit the kinetic energy into the risk site within the safety budget quota.