The adapter and mating cables provide opto-coupled GPIO capability to the FS10. The FS10 is powered by the external power supply connected to the flying leads, and the adapter cable provides 5V regulation.
The FS10 does not turn on until the USB portion of the mating cable is plugged into a USB host to ensure that the FS10 enumerates on the USB bus properly. Circuitry in the adapter cable provides protection from reverse voltage and over and under voltage exceeding the input specifications.
