1) Can your device with RS232 interface change to USB?
Answers
Some of our device with USB interface, some of them do not.
As RS232 interface, can connect to USB port through a RS232toUSB converter.

This converter can easily get from your local market.

Any ordinary converter can work.

2) Is that your HY2600 able connect to RS232?
Our HY2600 is with USB cable ordinary.
However, you could choose for RS232 cable.

When you need it, please talk to our sales.
However, USB and RS232 cable, accompany with the goods, just be one of them