The HEEM-T-003 series isolation transceiver module is an integrated power isolation, electrical isolation, RS-485 interface chip with isolation and bus protection functions. It is convenient to be embedded into the user's equipment, so that the product has the function of connecting to the RS-485 network. This series of modules adopts a potting process and has excellent isolation characteristics, with an isolation voltage as high as 1,000 VDC. This series can be used for industrial communications, coal mining industry, power monitoring, building automation, petrochemical industry, PLC and frequency converter communication.