The RS232 connector found on the RTCU-M10/M11 device is used for downloading new programs, configuration, etc. from a standard PC by using one of the RTCU tools available from www.logicio.com. Below will be found the connections needed to make this cable.
The cable uses a SUB-D9 female in both ends of the cable.
The connections to be made are:
Note: if the serial port functions are used, and the connection to the RTCU device should be via the RS232 port, a normal programming cable as specified above cannot be used. In order to enable the serial port functions, the Pin 6 (RS232 Detect) in both ends must not be connected (this signal is connected to Gnd on a normal programming cable).