Siemens SIMATIC PC Adapter USB A2 (article number 6GK1571-0BA00-0AA0) is fully compatible with Windows XP SP2 and higher

Critical Warning: Never use a "generic USB to serial" driver. The A2 has a specific USB PID/VID (VID 10CF, PID 0x1402) that only Siemens' driver recognizes.

Where to find the XP driver

  1. Siemens support website → Download section for PC Adapter USB A2
  2. Filter by "Released for" → Windows XP (32-bit)
  3. Look specifically for "PC_Adapter_USB_A2_Driver_V120.zip" or similar

5.1 Set the Interface in Set PG/PC Interface