Lindy RS-422/485 - Manual (Page 19)

When Windows has finished installing the driver you must check:
Control Panel > System > Hardware > Device Manager >Ports[COM&LPT]
It will show the additional ports:
Note:
1. If you have installed PCI Serial ports in your system, you will be requested
to restart your computer, when you have finished setting up each serial port.
Click “Yes” if all serial ports have been installed, otherwise click “No”.
2. The item number you see during the installation may be different from the
item you have installed.
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