The driver acts as the translator. Because many of these adapters use generic Chinese chipsets (like the CH340 or various Silabs chips), Windows doesn't always have the specific "handshake" file ready in its default library. Step-by-Step Installation Guide
It provides a direct gateway to FOUNDATION Fieldbus H1 networks via a standard USB port.
It is designed strictly for use with the Softing FFusb Interface board or equivalent portable fieldbus adapters.
If you cannot locate the driver, the device may be a generic USB 2.0 to multi-I/O bridge chip (e.g., from Genesys Logic or Realtek) used in cheap USB hubs or card readers—in which case Windows will typically load a native USB composite driver automatically.