for the benefit of all...
I purchased a SEVCON millipak controller and PCpak software. To get connected with it took some experimentation because the pdf documentation says very little. I got connected and this is the proceedure:
1) set your USB serial port to an open port and use 115.2K bps baud, 8 bits, 1 stop bit.
2) connect 2 12 volt batteries in series to make about 25VDC across terminals B- and B+ of the controller.
3) put a single pin into the pin 1 of the molex...