Other Parts Discussed in Thread: THVD1500
The THVD1505 (Automatic Bus-Polarity Correcting) and THVD1500 half-duplex RS-485 transceiver were designed to meet the requirements of part 11 Serial Communication Protocol RS-485 standard in the Q/GDW 11179.11-2015 standard, published by the State Grid Corporation of China (SGCC).
The certificate of THVD1500 can be found in this application report, while the one of THVD1505 is attached below.