The Complete Guide to the SIMATIC PC Adapter USB A2: Installing Drivers on Windows XP
Introduction: Why This Old Pair Still Matters
In the world of industrial automation, "if it isn't broken, don't fix it" is the golden rule. Despite Microsoft ending support for Windows XP over a decade ago, thousands of factories worldwide still run critical production lines controlled by legacy Siemens S7-300 and S7-400 PLCs. The bridge between a modern (or legacy) laptop running Windows XP and these PLCs is often the Siemens SIMATIC PC Adapter USB A2 (Order Number: 6GK1571-0BA00-0AA0).
The Verdict: A Perfect Match (With Caveats)
If you are still running Windows XP, the PC Adapter USB A2 is arguably the most stable and reliable way to connect to Siemens S7-300/400 PLCs.
3️⃣ Verify installation
- Go to Device Manager → Ports (COM & LPT)
→ Look for “Siemens PC Adapter USB A2 (COMx)” - Also check Universal Serial Bus controllers for “Siemens USB Adapter”
on Windows XP requires administrative privileges and a specific order of operation to avoid common "Found New Hardware" errors. Siemens SiePortal Prerequisites Operating System
Additional Resources
Do not plug the adapter into the USB port yet. Software drivers should always be installed before the hardware is connected to ensure Windows assigns the correct firmware to the device. 2. Running the Setup Locate the Setup.exe file within the driver package.
eBay: New units can be found for roughly $122 – $128 from various sellers.
The Simatic PC Adapter USB A2 Go to product viewer dialog for this item.