1, 4-20ma signal isolator power supply: the internal DC\/DC power supply isolation, so the power supply part can be completely isolated.
2, 4-20ma signal isolator: After the input end is processed by the circuit to collect the signal, it is modulated by the carrier frequency (the carrier frequency is generally 100KHz to 200KHz), and then isolated by the high-frequency isolation transformer, and then demodulated the signal through the circuit, and then output 4-20mA or voltage signal by the output end after signal processing.