Description
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.
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
Technical Specifications
| Cable Model | USB-MPI (6ES7972-0CB20-0XA0 compatible) |
| Cable Length | 3 Metres (3M) |
| Interface — PC Side | USB Type-A (Male) |
| Interface — PLC Side | DB9 Male (9-pin D-Sub, RS-485/MPI) |
| Conversion | USB to RS-485 / MPI / PPI / DP |
| MPI Baud Rate | 19.2 kbps / 187.5 kbps (auto-adaptive) |
| PPI Baud Rate | 9.6 / 19.2 / 187.5 kbps |
| Power Supply | USB bus-powered |
| OS Support | Windows XP / Vista / 7 / 8 / 10 / 11 (32 & 64-bit) |
| Software | STEP7 V5.2+; STEP7 Micro/Win 4.0+ |
| Condition | OEM Compatible — New (no retail box) |
Compatible 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
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Disclaimer
Always verify the exact port type and model number on your device before ordering.
If you are unsure which model is suitable, chat with the NJ Bravo team before ordering. We will help you check the part number, connector, and compatibility.
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
Package Contents
- 1× Siemens USB-MPI Programming Cable (6ES7972-0CB20-0XA0 compatible), USB-A to DB9M, 3M (OEM Compatible — New)
Warranty
- 90-day replacement warranty
- Covers manufacturing defects; physical damage and improper installation not included
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.
