Isolated USB to RS-485 Converter

Isolated converter to communicate with serial devices via USB port


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.

User Manual (PDF 339 KB)

Quick Start Guide (PDF 142 KB)

Windows Driver Software (ZIP 1.29 MB)

Linux Driver Software (ZIP 36 KB)

MAC Driver Software (ZIP 420 KB)

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Operating Systems

Windows Vista / 7 / 8 /10 (32 & 64 bit)
Windows 98, 98SE, ME, 2000, Server 2003, XP
Windows XP 64-bit
Windows XP Embedded
Windows CE.NET 4.2 & 5.0
MAC OSX 10.4 or higher
Linux 2.4 or higher

Optical isolation

700V continuous and 3500V peak

Data transfer rates

300 baud to 250 kB at RS-232 levels


4 wire Full Duplex RS-422 connection or 2 wire Half Duplex RS-485 connection


128 byte transmit buffer, 256 byte receive buffer

Communication distance

9843ft /3000m (4800bps), 6561ft /2000m (9600bps)

Chip Set



Din-rail mount

USB compliance

USB 1.1 and 2.0 compliant

Operating temperature

-4°F to 158°F / -20°C to 70°C


3.35” x 2.17” x 0.99” (H x W x D), 85mm x 55mm x 25mm (H x W x D)

Power supply

Power via USB port

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