I am having issues with the USB-SWD/UART-EMUZ, perhaps they are broken. Can
these parts be bought separately from ADI?
You should only connect the USB-SWD/UART-EMUZ to the target while not powered
up and not connected to the PC.
No, these parts can not be purchased separately from ADI. The full kit from ADI
is usually cheaper than a general J-Link from Segger - that's why we only sell
it as complete kit.