Support the Siemens S7-200 / 300/400 PLC communications. The signal partially isolated by high-speed optical coupling. Support for MPI and DP multi-master communication, support Siemens touch screen. Support 840D CNC system programming. The installation of Siemens original driver, without generating serial, USB direct selection. Support for multi-master communication 200PLC and ET200 communications, and PPI.