Product

SIEMENS USB-MPI | USB to DB9M MPI/PPI/DP PLC Programming Converter Cable — 3M (6ES7972-0CB20-0XA0 Compatible)

The Siemens USB-MPI (compatible with 6ES7972-0CB20-0XA0) is a USB-to-RS485/MPI converter programming cable for Siemens SIMATIC S7-200, S7-300, and S7-400 Series PLCs. It supports MPI, PPI, and DP protocols, enabling PC-to-PLC communication for programming, monitoring, and data download via STEP7 software.

2️⃣ Key Features

• USB Type-A on PC side — built-in USB-to-RS485/MPI converter; no native serial port required
• DB9 Male (9-pin D-Sub) on PLC side — connects to S7 MPI/PPI/DP port
• Supports MPI, PPI, and DP multi-master communication protocols
• MPI baud rate: 19.2 kbps and 187.5 kbps auto-adaptive; PPI: 9.6 / 19.2 / 187.5 kbps
• LED TX/RX communication indicator, USB bus powered
• Compatible with S7-200/300/400 and Siemens TP/OP touch panels
• 3-metre cable — standard installation length

3️⃣ Technical Specifications

4️⃣ Compatible Devices / Models

• Siemens S7-200 Series PLCs (PPI protocol)
• Siemens S7-300 Series PLCs (MPI protocol)
• Siemens S7-400 Series PLCs (MPI protocol)
• Siemens TP/OP touch panels: TP170, TP177, TP270, OP25, OP35, OP77, MP177, MP270, MP277, KTP400/600/1000 and similar

⚠️ Always verify the exact port type and model number on your device before ordering.

5️⃣ Typical Use Cases

• USB-based programming for Siemens S7-200/300/400 PLCs from modern PCs via STEP7 or STEP7 Micro/Win
• Program upload/download, online monitoring, and touch panel programming

6️⃣ Package Contents

• 1× Siemens USB-MPI Programming Cable (6ES7972-0CB20-0XA0 compatible), USB-A to DB9M, 3M (OEM Compatible — New)

7️⃣ Warranty

• 90-day replacement warranty
• Covers manufacturing defects; physical damage and improper installation not included

8️⃣ Additional Notes

• OEM compatible — not a Siemens-branded unit. The original 6ES7972-0CB20-0XA0 has been discontinued; successor is 6GK1571-0BA00-0AA0.
• Driver installation required for STEP7 V5.2–V5.4; STEP7 V5.5 and above has built-in driver support.
• ⚠️ SMART200 (S7-200 SMART) online monitoring may not be supported — verify compatibility before purchase.