Having a new laptop computer with only usb ports, no serial ports, I assumed I need only a usb to serial cable adaptor so I could connect up with the plc's within the factory I work in. I was told that for the adaptor to work, I would have to load drivers into the devices that I was trying to connect to. I was told this by someone at an electronics store. Should it work just fine without any drivers when trying to connect to a plc?