To Slawentiy<br />Cable shematic from you help and from Prolidi site, IMHO, contains error. As power suply, in RS232 can be apply only output: Pin 4 - DTR; pin7 - RTS and pin 3 - TD. Pin 8 - CTS is input. Therefore Diode, connected to pin 8, is non correct. This diode must be connected to pin 4 - DTR. |