ISO120 eight-channel isolated and PWS740 0 ~ 20mA current loop circuit diagram

An eight-channel isolation circuit is constructed using the ISO120 and PWS740 components, designed for a 0 to 20 mA current loop. The figure illustrates only one channel, where the circuit converts a 0 to 5V input voltage into a corresponding current output. The output is generated by the VN2222 transistor, which drives a 0 to 20 mA current to the load (RL). The use of the ISO120 isolation amplifier combined with the isolated power supply PWS740 ensures that the signals, power, and ground for the output are completely isolated from the input signal, power, and ground. This configuration provides excellent anti-jamming performance for the circuit.

The eight-channel isolation circuit utilizes the ISO120 isolation amplifier to achieve high-performance signal isolation. The ISO120 is designed to provide electrical isolation between its input and output, effectively preventing ground loops and minimizing noise interference. This is particularly beneficial in industrial applications where different ground potentials may exist.

The PWS740 isolated power supply is employed to power the ISO120, ensuring that the power supply for the input and output sections remains isolated. This isolation is critical in maintaining signal integrity and protecting sensitive components from voltage spikes or noise from other parts of the system.

The VN2222 transistor serves as a current driver, converting the voltage signal from the input (0 to 5V) into a proportional current output (0 to 20 mA). This output is suitable for driving various loads, such as sensors or actuators in control systems. The design allows for scalability, enabling the addition of more channels as needed without compromising performance.

In summary, the combination of the ISO120 isolation amplifier, the PWS740 isolated power supply, and the VN2222 current driver forms a robust eight-channel isolation circuit that excels in environments where signal integrity and noise resistance are paramount. The complete isolation of input and output ensures reliable operation in diverse applications.Eight-channel isolated as shown in Fig constituted by ISO120 and PWS740 0 ~ 20mA current loop circuit. FIG drawn only one channel, circuit 0 ~ 5V input voltage into a current o utput generated by the VN2222 tube drive 0 ~ 20mA current to the load RL. Because the use of isolation amplifier ISO120 with isolated power supplies with PWS740, signals, power and ground to the output signal input signal, power and ground completely isolated, so excellent anti-jamming performance of the circuit.