Converter must allow to connect serial devices to systems using a USB interface.
Connecting the converter to a PC, you get one extra high-speed RS-232/422/485 ports.
It must have the auto-tune baud rate and data format to the RS-485 network (totally compatible with Modbus).
The power converter derives from the USB port and doesn’t need any power adapter.
It also features a high-speed 921 Kb/s transmission rate support to various O.S. independent RS-232/422/485 Ports.
I will provide:
Specification for the USB-serial IC
At the end, freelancer must provide:
1 - Schematics
2 - Simulation at Proteus
3 - Gerber files for prototype