Siemens 6ES7972-0CB20-0XA0 PC Adapter USB

6ES7972-0CB20-0XA0 SIEMENS

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Critical Compatibility Note: The 6ES7972-0CB20-0XA0 supports a maximum MPI/DP baud rate of 1.5 Mbit/s . This is sufficient for programming and diagnostics but is lower than the 12 Mbit/s capability of the successor A2 adapter. For high-speed PROFIBUS networks or S7-1200/1500 systems, the A2 adapter or an Ethernet-based solution is required.

What's Included

• 1 × Siemens 6ES7972-0CB20-0XA0 PC Adapter USB (with integrated 5 m USB cable)

Note: Driver software is included with STEP 7 V5.5+ / TIA Portal V13+; otherwise, the SIMATIC PC Adapter USB Software V2.0 must be installed separately .

Why Buy From Us?

• In Stock – Limited aftermarket stock available

• Tested – Each unit verified for functionality (refurbished units)

• Warranty Included – 12-month warranty for purchase confidence

• Technical Support – Legacy SIMATIC compatibility assistance available

Frequently Asked Questions (FAQ)

Q1: What is the Siemens 6ES7972-0CB20-0XA0?

It is the PC Adapter USB, a programming adapter that connects a PC or notebook to SIMATIC S7-200/300/400 and C7 controllers via MPI, PROFIBUS DP, or PPI .

Q2: Is this product still available from Siemens?

No. It was discontinued with an end-of-life date of June 1, 2015 (PM500 status). It is available only through the industrial aftermarket .

Q3: What is the successor model?

The designated successor is 6GK1571-0BA00-0AA0 (PC Adapter USB A2), which supports higher baud rates and modern operating systems .

Q4: What is the maximum communication speed?

The adapter supports a maximum of 1.5 Mbit/s for MPI/DP communication .

Q5: Does this adapter work with S7-1200 or S7-1500?

No for S7-1200 (it lacks an MPI/DP port). For S7-1500, it may work via the CPU's MPI/DP port (if equipped), but the adapter is primarily designed for legacy S7-200/300/400 systems .

Q6: Does it require an external power supply?

No, in most applications. The adapter draws 24 V DC from the PLC's MPI/DP port. However, some equipment (e.g., 840D NCU) may require external 24 V supply on the MPI port .

Q7: Does it work with Windows 10 or 11?

Native driver support is limited to Windows XP/Vista/7. Windows 10/11 may work with compatibility adjustments, but the successor PC Adapter USB A2 is recommended for modern operating systems .

Q8: What software is required?

STEP 7 V5.x or TIA Portal V1x. For STEP 7 V5.5+ or TIA Portal V13+, the driver is included; otherwise, the SIMATIC PC Adapter USB Software V2.0 must be installed separately .

Q9: What are the dimensions and weight?

Dimensions are approximately 105 × 58 × 26 mm. Net weight is 0.491 kg .

Q10: What should I verify before ordering?

Always verify the exact part number (6ES7972-0CB20-0XA0), confirm your PLC model has an MPI/DP port (not S7-1200), ensure your operating system is compatible (Windows 7 or earlier natively), check the condition and warranty of the specific unit offered, and consider whether the successor 6GK1571-0BA00-0AA0 would provide better performance and long-term availability.