This is the USB driver for PowerFlex 1203-USB Converter that Connects Allen-Bradley PowerFlex 5 VFD with Connected Workbench.
Plug the 1203-USB into a USB port on your computer. You should then get a new hardware found message.
When you are requested to supply the source of these drivers, the extracted folder from the zip.
These drivers will create a virtual COM port on your computer.
Find the port number from the Ports (COM & LPT) portion of your computer's hardware device manager.
Set the baud rate for this port to 115.2KB in DriveExplorer or RSLinx and connect as usual.
More explicit directions are in the file "USB Driver Installation Instructions.doc" the zip file.