Re: USB or Ethernet for controller interface?

Gary wrote:

Thank you for the feedback. Here are more details:

See, when you provide more detail in your enquiry the answers get better.

100Mb/s Ethernet or USB are needed for thru-put. CAN & RS232/485 have
been ruled out. Ethernet or USB data rate is needed because the
design will be transferring large amounts of buffered data. The
buffer will be large enough to handle Ethernet or USB latency and the
PC's non-deterministic nature. The PC side will be used as the human-
interface and data storage. Not for time or safety critical control.

The design will be doing basic control stuff - reading sensors &
inputs and controlling actuators. The isolation Rene mentioned is
very good feedback.

Isolation is important to consider in any application so always select
interfaces that provide proper galvanic isolation. As Tauno has already
responded, and as you feel you can live with the slower data rates of
Ethernet (some dedicated USB 2.0 interfaces are supposed to be able to
reach 480Mbps) then go with Ethernet. If your rate was not quite so
demanding I would have suggested RS485 but you have, apparently, already
ruled that out.

--
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