The VirtualSCADA® VSU-485G is an isolated USB to RS-485 converter that can be used for communication between a PC, MAC or Linux Computer and devices that have a RS-485 communication port. Multiple VSU-485G converters may be used to create a RS485 network.
USB to RS232 Converter
The VirtualSCADA® VSU-232R-10 is a USB to RS-232 converter that can be used for communication between a PC, MAC or Linux Computer and devices that have a RS-232 communication port.