PLC Programming & MPI Communication Solution – SIEMENS 6ES7923-0BB00-0DB0 | SIMATIC S7 Series
Where This Product Is Used
The SIEMENS 6ES7923-0BB00-0DB0 is a dedicated MPI/PROFIBUS DP connecting cable designed for use with the SIMATIC S7-300 and S7-400 PLC families. It is the standard interface cable between the PC Adapter (USB/MPI) and the CPU’s MPI or DP port, enabling engineers to upload/download programs, monitor variables, and perform online diagnostics via STEP 7 or TIA Portal.
- Automotive assembly line PLC commissioning and maintenance
- Chemical plant DCS integration with SIMATIC S7 controllers
- Food & beverage packaging line programming stations
- Water treatment SCADA system field device configuration
- Power distribution panel PLC firmware updates
- OEM machine builder factory acceptance testing (FAT)
Technical Specifications
| Part Number | 6ES7923-0BB00-0DB0 |
| Brand | SIEMENS |
| Series | SIMATIC S7 / PC Adapter Accessories |
| Cable Type | MPI / PROFIBUS DP Connecting Cable |
| Compatible Interfaces | PC Adapter USB (6ES7972-0CB20-0XA0), MPI port on S7-300/400 CPUs |
| Connector Type | 9-pin Sub-D (RS-485) |
| Protocol Support | MPI, PROFIBUS DP |
| Compatible Software | STEP 7 V5.x, TIA Portal (via PC Adapter) |
| Compatible CPUs | S7-300 (CPU 312–319), S7-400 (CPU 412–417) |
| Weight | ~1,000 g (packaged) |
| Origin | Germany / SIEMENS Factory |
Why Engineers Specify This Model
- OEM Compatibility: Factory-matched to SIEMENS PC Adapter USB — eliminates driver conflicts common with third-party cables.
- Reliable Signal Integrity: Shielded RS-485 construction maintains data integrity in high-EMI industrial environments.
- Plug-and-Play: No additional configuration required — recognized immediately by STEP 7 hardware manager.
- Dual Protocol: Supports both MPI and PROFIBUS DP on the same cable, reducing spare-parts inventory.
- Long Service Life: Industrial-grade PVC jacket rated for repeated connect/disconnect cycles in field conditions.
Complete System Bill of Materials
For a complete S7-300 programming workstation, engineers typically pair this cable with:
- 6ES7972-0CB20-0XA0 – PC Adapter USB A2 (host-side USB interface)
- 6ES7315-2EH14-0AB0 – CPU 315-2 DP (typical S7-300 CPU)
- 6ES7307-1EA01-0AA0 – PS 307 5A Power Supply
- 6ES7321-1BL00-0AA0 – SM 321 Digital Input Module
- STEP 7 Professional V5.7 – Programming software license
Compliance & Industry Standards
- CE Marked – EU Machinery Directive 2006/42/EC compliant
- PROFIBUS International certified interface
- RoHS 2 Directive (2011/65/EU) compliant
- IEC 61158 (PROFIBUS) protocol standard
- UL Listed components (where applicable)
Quality Assurance & Sourcing
Konmask.com sources the 6ES7923-0BB00-0DB0 exclusively from authorized SIEMENS distribution channels and verified industrial surplus with full traceability. Every unit undergoes:
- Visual inspection for connector pin integrity and jacket condition
- Continuity and shielding verification
- Authenticity check against SIEMENS hologram and label standards
- Anti-static packaging for safe transit
How to Source This Part
Submit your RFQ directly via support@konmask.com or call +0086 19859288691. For urgent project timelines, include your required delivery date and quantity — we maintain buffer stock for critical MRO orders. Lead time for standard orders: 3–7 business days (international DHL/FedEx available).
Application-Specific FAQ
Q: Can I use 6ES7923-0BB00-0DB0 with TIA Portal?
A: Yes, when paired with the PC Adapter USB (6ES7972-0CB20-0XA0), TIA Portal recognizes the MPI/DP connection for S7-300/400 CPUs in online mode.
Q: Is this cable compatible with S7-1200 or S7-1500?
A: No. S7-1200 and S7-1500 use PROFINET (Ethernet) for programming. This cable is specific to MPI/DP-equipped S7-300 and S7-400 CPUs.
Q: What is the maximum cable length for reliable MPI communication?
A: SIEMENS specifies a maximum MPI segment length of 50 m at 187.5 kbps without repeaters.
Q: Do you provide a warranty?
A: Yes — 12-month warranty against manufacturing defects. DOA units are replaced within 5 business days.
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Contact: support@konmask.com | +0086 19859288691
