Col, you need what I think is called a "Null Modem Cable". Somthing like that.

You will find plenty of topics on here about communicating with 500 series product.
As far as I know, USB is a No No.
Others will chip in here, Cheers Chris smile

No 18 in the Hall of fame smile I have simple tastes; I am content to settle for the best:
GIK monster bass panels, rear wall. QNAP TVS 471i3. Roon into DSP5200SE via 210/ 218 zone... Explorer 2. Bluesound Pulse 2, Mini & Flex. 596v1, 518, Foxsat HD, Sony BDP, Pioneer 5090, 2 Chromecast's for LRB videos. MS200 to F80 for a Roon zone