Some people are still using specialist expensive programming software and cables to programme their PLC’s.
With the Unitronics OPLC each unit comes with a programming cable and software CD in the box.
No need to pay for the expensive add on.
If you still want a USB to Mitsubishi PLC cable take a look at this site. Great value and fully tested on a number of operating systems at a fraction of the cost of the SC-09.
USB Cables
Mitsubishi Part Number SC-09
Standard programming cable