We use serial to usb converters at the moment, they are so good we have ordered some more.
East Coast Viners Grain
Easy to set up and use; reliable.
Simple, recognised easily and the documentation appears to be complete and concise. Good stuff.
MiE (Medical Imaging Electronics)
Powerful and easy to use .COM Interface
So far I've used the 8 port un-managed switch, RS-485 to Ethernet and now the US-235 without any issues. Great pricing through Newark, well designed and built products!!