See this product in video click on the following link: https://youtu.be/2E0TTcalr40

USB to RS485 Converter Adapter Support Win7 XP Vista Linux Mac OS WinCE5.0 RS 485 RS-485 for arduino


The USB/RS485 converter allows to the PC computer the devices controlled via RS-485 interface.


ATTENTION! On hardwares with many COM ports, it may be necessary to check the assigned COM port number. You can do it by: Device Manager -> Ports (COM and LPT). You can change the assigned COM port number using Device Manager - Advanced Options for a port.


USB to RS485 Converter Adapter
The driver download link;
http://www.mediafire.com/file/ab3qg44e69693ll/USB_%25E9%25A9%25B1%25E5%258A%25A8340%252BXP%252BW7.rar/file


Used for:
LED display of communication data
Machine PLC data reading and writing
Monitoring data read and write , and PTZ control
Centralized control of household electrical appliances
Access Control System ; card
A variety of industrial automation ; instrumentation
Parking ; bus fees
Dining Hall ; staff attendance
Highway toll station; ATM machine


Support System:
Use the CH340 chip,support for Windows XP,Vista,Windows 7 
No need external power, powered by USB port
Output port A and B connect with the termianl device. 
Net weight: 8g