Isolated safety barrier/three_in_three_out frequency input isolated safety barrier

The frequency input and output are safety barrier, and the signals of the voltage type (V), complementary type (F) and open collector (C) output by the encoder in the dangerous area are isolated and output to the safe area through safety barrier, at the same time, it provides power to encoders in dangerous areas. Independent power supply is required, and power supply, input and output are isolated.