Xp | Siemens Pc Adapter Usb A2 Driver Windows

Feature: Installing and Troubleshooting the Siemens PC Adapter USB A2 Driver on Windows XP

Overview

The Siemens PC Adapter USB A2 (often used with Siemens/Gigaset mobile phones and some industrial devices) provides a USB serial connection between a computer and a Siemens device for synchronization, firmware updates, and data transfer. Installing it on Windows XP can be straightforward but occasionally requires extra steps because Windows XP predates many modern USB-to-serial drivers and may not automatically recognize the adapter.

Step 4: Connect the hardware

• Plug the PC Adapter USB A2 into a direct USB port on the motherboard (avoid front-panel hubs or USB 3.0 ports—XP struggles with USB 3.0 controllers).
• Connect the 24V DC power supply to the adapter (the USB bus alone may not provide stable power on old laptops).
• Connect the MPI/Profibus cable to your PLC (or terminate with a bus connector).

Final pro tip: If you are planning a complete migration away from Windows XP, start documenting your STEP 7 projects now. The longer you wait, the harder it becomes. But until that day comes, the trusty USB A2 and a properly configured Windows XP machine will keep your plant running. siemens pc adapter usb a2 driver windows xp

1. Use the built-in usbser.sys/CDC driver if device uses standard USB CDC-ACM class — auto-assigned to a COM port.
2. Vendor-supplied driver + INF that installs a custom kernel driver or an FTDI/Prolific driver that provides VCP support.

3. Identifying the Adapter’s Chipset

• Why it matters: The correct driver depends on the chipset inside the adapter. Common chipsets:

  Using “HW Config” in STEP 7:

  1. Launch STEP 7 → Hardware Configuration.
  2. In the online menu, select “Accessible nodes.”
  3. If configured correctly, you should see the PLC station with its MPI address.