Isolated USB-RS485 Converter V3
Thanks our KMP Isolated USB-RS485 Converter V3.0, now you will be able to have a communication with RS485 devices through the USB port on your computer. It will allow up to 128 devices to communicate through the same data line over a cable length of up to 1200m/4000ft. It is and the ultimate expansion that allows you connect to almost every legacy industrial system using serial connectivity such as industrial PLCs, controllers, drives and HMIs. The RS485 can be used to turn old industrial systems like industrial machinery, heating systems and conveyors into new IoT devices.
The converter is equipped with 2.75 kV of isolation and internal surge-protection on each data lines to protect the host computer and converter against high voltage spikes, as well as ground potential difference. A USB RS485 Isolated Converter V3.0 also features a high-speed 500 Kbps transmission rate, and supports various O.S. It Includes by RS485 line galvanically isolated power supplier.
How to connect the USB RS485
converter with an existing line
You can connect your KMP Isolated USB-RS485 Converter V3.0 direct to existing RS485 line (the line ends are terminated with resistors 120 Ohm and the line is powered). In this case you must use A, B and GND lines.
Connecting the Isolated USB-RS485
Converter with a new line
You can connect your KMP Isolated USB-RS485 Converter V3.0 at the beginning RS485 line. And you can power the RS485 line with converter. It include galvanically isolated DC-DC power converter. In this case you must use A, B, V+ and GND lines. Resistors R1* and R3* (are depending at the line [you might use 560 Ohm]) for powering and 2x 120 Ohm for termination line.