In the rapidly evolving world of computer technology, the lifecycle of hardware and software support often creates significant challenges for users who rely on older but functional equipment. A quintessential example of this problem is attempting to install a modern "PC Adapter USB A2" (commonly a Siemens SIMATIC programming adapter for industrial PLCs) on a machine running Windows XP. While seemingly a niche issue, this scenario serves as a powerful lesson in driver management, operating system compatibility, and the practical realities of maintaining legacy industrial systems.
The Core Problem: A Generational Mismatch
The primary difficulty arises from a fundamental generational mismatch. Windows XP, released in 2001, reached its end of mainstream support in 2009 and extended support in 2014. The PC Adapter USB A2, particularly later revisions, was designed for Windows 7 and newer operating systems. Consequently, official drivers for Windows XP are often nonexistent, poorly signed, or require specific service packs (like SP3) and hotfixes that are difficult to locate. A user connecting the adapter to a Windows XP machine typically sees an "Unknown Device" error or a failed driver installation, with the system unable to recognize the adapter’s unique Vendor ID (VID) and Product ID (PID).
Why Persist with Windows XP?
The motivation to solve this problem stems from industrial automation. Many factories still run critical machinery (PLCs from Siemens S7-300/400 series) that are programmed and diagnosed exclusively via software like STEP 7, which itself only runs stably on Windows XP. Upgrading the PLC is prohibitively expensive, and upgrading the programming PC risks breaking compatibility with the existing control software. Thus, engineers are forced to maintain XP machines, making the USB A2 driver a necessary bridge.
Strategies for a Solution
Given the lack of official support, users must employ several workarounds:
Virtualization as a Last Resort: If no XP driver exists, the alternative is to run Windows XP as a virtual machine (using VirtualBox or VMware) on a modern Windows host. Here, the USB adapter is passed through to the virtual XP environment. However, this introduces timing and latency issues that can disrupt real-time PLC communication.
Common Pitfalls
Conclusion: A Practical Reality
The struggle to install a PC Adapter USB A2 driver on Windows XP is more than a technical nuisance; it is a window into the world of industrial computing where legacy systems persist long after consumer technology has moved on. The solution is rarely a simple download. Instead, it requires forensic-like searching for archived drivers, a willingness to bypass unsigned driver warnings, and an understanding of USB enumeration. For the engineer on the factory floor, this essay’s most useful takeaway is clear: Do not use the latest driver. Search specifically for version 1.2 or earlier, install manually via "Have Disk," and disable USB power saving. In doing so, an obsolete operating system can once again communicate with the machines that keep our industries running.
Installing the Siemens PC Adapter USB A2 (order number 6GK1571-0BA00-0AA0) on Windows XP is a common requirement for maintaining legacy industrial automation systems. This adapter serves as the critical link between a PC and SIMATIC S7 systems via MPI or PROFIBUS networks. Core Functionality
The PC Adapter USB A2 is designed to replace older serial or internal card-based adapters. It is powered directly via the USB cable and supports transmission speeds up to 12 Mbps. It is compatible with Windows XP starting from Service Pack 2 (SP2) and works with major Siemens engineering software including STEP 7, TIA Portal, and SIMATIC PDM. Step-by-Step Installation Guide
To ensure a successful installation on Windows XP, follow these professional guidelines:
Preparation: Close all running programs. Ensure you have administrative rights on the PC. Driver Software Installation: Insert the PC Adapter USB A2 Driver Disk CD.
Run Setup.exe. If prompted, use the "Run as..." option to select the Administrator account.
The setup will install necessary components, including the Microsoft Visual C++ 2005 Redistributable. If you do not have admin rights, the installation may fail at this specific step.
Restart the computer once the "SIMATIC Device Drivers" installation is complete. Hardware Connection:
After the reboot, connect the USB A2 adapter to the PC's USB port.
The Windows "Found New Hardware Wizard" should appear automatically.
Select "Yes, this time only" when asked to search for software, then choose "Install the software automatically". Verification: Open Device Manager through the Control Panel.
Under the SIMATIC NET category, you should see "SIMATIC PC Adapter USB A2" listed. Common Troubleshooting Tips
Virtual Machine Issues: If running Windows XP inside a virtual environment (like VMware or VirtualBox), ensure the USB controller is set to USB 2.0 compatibility.
Manual Path: If the driver is not found automatically, it is often pre-installed at C:\Program Files\Siemens\Common\S7SDD after installing STEP 7 or TIA Portal.
Interface Configuration: In the "Set PG/PC Interface" tool, avoid using the "Auto" setting; manually select MPI or PROFIBUS for more reliable communication. PC Adapter USB A2 - Siemens Industry Online Support
The label "PC Adapter USB A2" is not a brand name, but rather a generic product identifier used by dozens of no-name manufacturers in the late 2000s and early 2010s. The "A2" typically refers to either:
These dongles are Class 2 Bluetooth radios with a range of approximately 10 meters. Under the plastic casing, they almost universally use one of three chipsets: CSR (Cambridge Silicon Radio), Broadcom (formerly Widcomm), or Realtek.
Why Windows XP Fails to Recognize It Out of the Box: Windows XP (SP2 and SP3) includes built-in Bluetooth support, but only for a limited whitelist of hardware IDs. The generic "PC Adapter USB A2" often has a Vendor ID (VID) that Microsoft never added to Windows Update for XP. Hence, you need a third-party driver.
Microsoft ended mainstream support for Windows XP in 2009 and extended support in 2014. Since then:
Additionally, Windows XP’s driver model (WDM – Windows Driver Model) is vastly different from Windows 10’s (WDF). You cannot use modern drivers on XP. You need drivers specifically compiled for XP (32-bit or 64-bit – though 64-bit XP is extremely rare).
This means downloading driver files from untrusted third-party sites is risky, but sometimes the only option. This article will guide you safely.
Important: Do not plug the USB cable into the PC until after you have installed the drivers.
How to install the PC Adapter USB A2 driver on Windows XP pc adapter usb a2 driver windows xp
If you need to connect a Siemens PC Adapter USB A2 to a Windows XP computer, follow these steps:
⚠️ Note for Windows XP users:
Despite your best efforts, some "PC Adapter USB A2" dongles use extremely obscure Chinese chipsets (e.g., RTL8761B with custom VID). In these cases:
Some "PC Adapter USB A2" clones use a slightly modified VID that CSR Harmony rejects.
PC Adapter USB A2 Driver – Windows XP
Driver Version: 1.1 (example)
Supported OS: Windows XP Professional SP3 (32-bit)
Vendor: Siemens
Installation steps:
Troubleshooting:
The red light on the factory machine’s control panel blinked incessantly, a digital scream for help that no one in the modern IT department could understand.
The year was 2024, but inside the maintenance office of the old textile plant, time had stopped somewhere around 2003. Arthur, the plant’s only remaining senior automation engineer, rubbed his temples. He was staring at a beige, brick-like laptop—a Panasonic Toughbook CF-29.
"Artie," the plant manager, Dave, said, leaning against the doorframe with a coffee cup. "Line 4 is down. The servo drive is faulted out. We need that machine running by second shift, or we miss the shipment."
Arthur nodded slowly. "I know, Dave. The logic is corrupted. I need to plug into the PLC to reload the backup. But I can’t get the laptop to talk to the processor."
"Why not?"
"Drivers," Arthur grunted, the word tasting like ash.
Arthur opened his worn toolbox and pulled out the artifact: a Siemens PC Adapter USB A2. It was a small, purple and green dongle, a vital bridge between the ancient RS-485 serial world of the PLC and the USB port of a computer.
The problem was simple and devastating. The Toughbook had been wiped and re-imaged last week by a young intern from the head office. The kid meant well, but he had installed a stripped-down version of Windows XP Professional. He had installed the base OS, but he hadn’t installed the specific, finicky driver required for the PC Adapter USB A2.
Arthur plugged the adapter into the USB port. Windows XP chimed its cheerful, four-note "device connected" jingle.
Then, the nightmare began.
A speech bubble popped up from the system tray: Found New Hardware: PC Adapter USB A2.
Arthur watched the "Found New Hardware Wizard" splash screen appear. He clicked the radio button for Install from a list or specific location (Advanced). He pointed the wizard to the C:\Siemens\Drivers folder, praying the intern had at least copied the installation files.
The wizard whirred. The hard drive clicked.
And then, the dreaded message:
"The hardware was not installed because the wizard cannot find the necessary software."
Arthur cursed under his breath. The A2 adapter was notorious for this. It wasn't a standard serial-to-USB converter; it used a proprietary Siemens protocol. Without the exact Simatic Net drivers or the specific A2 driver package, it was nothing but a plastic paperweight.
He tried Windows Update. A futile gesture on an XP machine in 2024, but he tried it anyway. The browser spun and died. The Microsoft support pages for XP were long gone, digital ghosts in the machine.
"Artie?" Dave’s voice came from the door again. "We got corporate on the line. They're asking why we can't just remote in."
"Because this machine was built when people still used pagers, Dave!" Arthur snapped, then softened. "Look, I need ten minutes. I have to dig up the legacy files."
Arthur opened the file cabinet labeled LEGACY SOFTWARE - DO NOT THROW AWAY. He riffled through stacks of 3.5-inch floppies and CD-ROMs labeled Simatic Step 7 v5.4. He found a scratched CD sleeve with Siemens Simatic Net 2008 written on it in Sharpie.
He slid the CD into the drive. It whirred loudly, struggling to read the surface.
Arthur navigated to the Device Manager. He saw the yellow question mark next to Other devices > PC Adapter USB A2. He right-clicked and selected Update Driver.
He selected Don't search. I will choose the driver to install.
He clicked Have Disk.
He browsed to the CD drive, navigating through the labyrinthine folder structure: CD_Drive > Software > Simatic_Net > Drivers > USB.
He saw a list of .inf files. He selected Simatic_USB.inf. In the rapidly evolving world of computer technology,
A list of devices populated the window. He scrolled down past the "PC Adapter USB" and found the specific entry: "PC Adapter USB A2".
He highlighted it and clicked Next.
A warning box appeared: "The software you are installing for this hardware has not passed Windows Logo testing..."
This was the classic XP hurdle. In the modern world, signed drivers were mandatory. In the world of industrial automation on Windows XP, "signed" was a luxury they rarely had.
Arthur didn't hesitate. He clicked "Continue Anyway."
The progress bar appeared. Files copied from the CD to the deep, dark corners of the C:\Windows\System32\drivers folder. Arthur watched the bar creep forward, his heart rate synchronizing with the progress bar. If this failed, he would have to drive two hours to his home office to find his backup hard drive.
Copying file: siusbx64.sys... (No, wrong architecture, the wizard skipped it).
Copying file: siusbx86.sys... (There it was. The 32-bit driver).
The wizard screen changed.
"Completing the Found New Hardware Wizard."
Arthur let out a breath he didn't know he was holding. He clicked Finish.
He looked at the Device Manager. The yellow question mark was gone. In its place, under the "Simatic" category, sat the PC Adapter USB A2, solid and recognized.
"Dave," Arthur called out. "I'm in."
He opened the Step 7 programming software. The interface was grey, blocky, and utilitarian. He set the PG/PC Interface to the PC Adapter. He plugged the purple end of the cable into the PLC’s MPI port.
He clicked Connect.
The status bar at the bottom of the screen flickered: Establishing connection to PLC...
Then: Online.
Arthur navigated to the Block folder. He saw the corrupted logic block. He selected his backup file and clicked Download.
Outside the office window, the massive hum of Line 4 starting up vibrated through the floor. The red warning light on the machine turned green.
Dave poked his head back in, looking relieved. "We're moving again. Nice work, Artie. What was it?"
Arthur unplugged the adapter and gently placed it back in its protective case. He looked at the old Windows XP desktop, the Bliss hill wallpaper faded and worn.
"Just a conversation lost in translation, Dave," Arthur said, patting the laptop. "The hardware was screaming, but the software didn't know the language. I just taught them how to talk again."
He closed the laptop lid. The crisis was over, but he knew the adapter and the XP driver would have to do this all again tomorrow. That was the life of a bridge builder between the old world and the new.
The Siemens SIMATIC PC Adapter USB A2 (6GK1571-0BA00-0AA0) Go to product viewer dialog for this item.
is a professional USB-to-MPI/DP adapter used to connect a PC to Siemens S7-300/400 PLCs. For Windows XP, specific installation steps and driver versions are required to ensure stable communication. 1. Driver Software Requirements
Operating System: Windows XP Service Pack 2 (SP2) or higher is required.
Essential Software: You must have a SIMATIC software package installed before the driver, such as STEP 7 (Classic), TIA Portal, or SIMATIC PDM.
Driver Version: The specific driver disk required is the PC Adapter USB A2 Driverdisk V1.0. 2. Installation Procedure
To avoid driver conflicts or "hardware not found" errors, follow this sequence:
Close Programs: Start Windows XP and close all running applications.
Siemens SIMATIC PC Adapter USB A2 6GK1571-0BA00-0AA0 compatible with Windows XP SP2 and higher
. To ensure successful communication with SIMATIC S7 systems via MPI or PROFIBUS, follow these installation requirements and steps: Siemens SiePortal 1. Official Driver Download The primary driver for this hardware is the PC Adapter USB A2 Driverdisk V1.0 Siemens SiePortal Official Source: You can download it directly from the Siemens Industry Online Support (SIOS) portal Prerequisite:
It is highly recommended to install a Siemens engineering tool like TIA Portal S7-Micro/WIN
the driver, as these packages often include the necessary foundational communication libraries. Siemens SiePortal 2. Installation Steps for Windows XP Close all programs and ensure you are logged in as an Administrator from the driver package (right-click and select Run as... Administrator if necessary). The installer will typically install Microsoft Visual C++ 2005 Redistributable first; do not cancel this step. Restart the PC Virtualization as a Last Resort: If no XP
once the installation of "Simatic Device Drivers" is complete. Plug in the USB A2 adapter. The Found New Hardware Wizard should appear automatically. Select "Install the software automatically" Siemens SiePortal 3. Configuration and Verification Device Manager: Check under SIMATIC NET
; you should see "Simatic PC Adapter USB A2" listed without any error icons. Set PG/PC Interface: Open this utility in the Control Panel and select PC Adapter USB A2 as the interface. Virtual Machine Tip:
If running Windows XP in a virtual machine (like VMware or VirtualBox), ensure the USB 2.0 controller
is enabled in the VM settings to avoid "Internal Error" messages. Siemens SiePortal 4. Key Specifications Protocols: Supports MPI and PROFIBUS baud rates. USB 2.0 (compatible with 1.1 and 3.0). Powered directly via the USB cable from the PC. Are you experiencing a specific error code
in the Device Manager, or is the adapter not appearing in the PG/PC Interface PC Adapter USB A2 Drivers - Siemens SiePortal
SIMATIC PC Adapter USB A2 (article number 6GK1571-0BA00-0AA0
) is a critical hardware component used to connect PCs or notebooks to SIMATIC S7 systems via PROFIBUS or MPI interfaces. For users running legacy industrial systems, maintaining compatibility with Windows XP (Service Pack 2 or higher) is often necessary. Driver Compatibility and Software Requirements Operating Systems
: Supported on Windows XP (32-bit and 64-bit), Vista, and Windows 7/8/10. Automatic Installation : Drivers are typically included with installations of SIMATIC STEP 7 (v5.5 SP4 or higher) or TIA Portal
. If these are installed, manual driver installation is often unnecessary. Manual Path
: If the driver is missing after a software installation, it can often be found locally at C:\Program Files\Siemens\Common\S7SDD Key Specifications Download Driver for PC Adaptor USB A2 . - Siemens SiePortal
SIMATIC PC Adapter USB A2 (Article Number: 6GK1571-0BA00-0AA0
) is a specialized Siemens interface used to connect a PG/PC to SIMATIC S7 systems via PROFIBUS or MPI. It is compatible with Windows XP SP2 and higher Electric Automation Network Drivers & Software Requirements
To use the PC Adapter USB A2 on Windows XP, you generally need the PC Adapter USB A2 Driverdisk V1.0 Siemens SiePortal Built-in Drivers
: Drivers are often included automatically when you install engineering software like STEP 7 (Classic) TIA Portal SIMATIC NET Manual Download
: If not already present, you can find the driver disk on the Siemens Industry Online Support (SIOS) Siemens SiePortal Installation Procedure
For a successful installation on Windows XP, follow these specific steps: Siemens SiePortal Close all active programs and startup items. Run as Administrator : Right-click from the driver disk and select
, then choose the Administrator account. If you do not use admin rights, the installation will fail during the Microsoft Visual C++ 2005 Redistributable step. Follow the Wizard
: The "Simatic Device Drivers" window will appear. Complete the installation and restart your PC Connect the Hardware
: After restarting, plug the USB A2 adapter into your PC. The "Found New Hardware Wizard" should trigger. Finalize in Windows
: Select "Yes, this time only" for the hardware wizard, and choose "Install the software automatically". Siemens SiePortal Configuration & Troubleshooting
PC Adapter USB A2 6GK 1571-0BA00-0AA0 Drivers problem - XP SP3
. If you’ve lost your CD, you can often find the download on the Siemens Support Portal or hosted on community sites like PLC ONE. 2. Installation Steps (The "Clean" Method)
To avoid the common "installation stopped" error, follow this sequence:
Run as Administrator: Right-click the Setup.exe from the driver folder and select Run as... then choose the Administrator account.
Install Prerequisites: The setup will install the Microsoft Visual C++ 2005 Redistributable first. If you aren't in an Admin session, it may hang here.
Restart First: Once the "Simatic Device Drivers" are installed, restart your PC before plugging in the adapter.
Hardware Wizard: Plug in the USB cable. When the "Found New Hardware Wizard" pops up, select "No, not this time" for Windows Update, then "Install the software automatically". 3. Configuration & Troubleshooting
Set PG/PC Interface: Open your communication settings and ensure "PC Adapter USB A2" is selected.
Virtual Machines: If you're running XP in a VM (like VMware or VirtualBox), make sure your USB controller is set to USB 2.0 compatibility; users have reported that USB 1.1 settings often cause internal errors.
Verify in Device Manager: You should see "Simatic PC Adapter USB A2" listed under Simatic Net without any yellow exclamation marks.
Are you having trouble with a specific error code, or are you just trying to get the initial connection set up? I can help you look up the specific "PG/PC Interface" settings for MPI or Profibus if you need them. AI responses may include mistakes. Learn more
PC Adapter USB A2 6GK 1571-0BA00-0AA0 Drivers problem - XP SP3