SIEMENS 6ES7972-0CB35-0XA0 – TS Adapter II for Remote Teleservice | SIMATIC S7 Platform
The SIEMENS 6ES7972-0CB35-0XA0 is the second-generation Teleservice Adapter engineered for remote diagnostics, programming, and maintenance of SIMATIC S7-300/S7-400 PLCs over standard telephone networks. Designed for industrial environments where on-site access is impractical or cost-prohibitive, this adapter enables engineers to connect to remote controllers via ISDN or PSTN, reducing downtime and travel costs across distributed automation systems.
Konmask.com supplies this module as verified OEM stock, fully tested and traceable to Siemens manufacturing standards — the preferred sourcing choice for MRO procurement teams and system integrators worldwide.
Complete Technical Specifications
| Part Number | 6ES7972-0CB35-0XA0 |
| Product Family | SIMATIC S7 Teleservice Adapter |
| Generation | TS Adapter II (2nd Generation) |
| Compatible Controllers | SIMATIC S7-300, S7-400, C7 |
| Communication Interface | MPI / PROFIBUS DP (via MPI port on CPU) |
| Remote Network | ISDN (BRI), PSTN (analog modem) |
| Baud Rate (MPI) | Up to 187.5 kbps |
| Power Supply | 24 V DC (via MPI connector) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 10% to 95% (non-condensing) |
| Protection Class | IP20 |
| Dimensions (W×H×D) | Approx. 75 × 110 × 35 mm |
| Weight | Approx. 1,350 g (with packaging) |
| Certifications | CE, UL, cUL |
| Software Compatibility | STEP 7 V5.x, SIMATIC Manager |
| Country of Origin | Germany |
Proven Application Environments
- Remote Plant Maintenance: Diagnose and modify S7 PLC programs from a central engineering office without dispatching field technicians.
- OEM Machine Builders: Provide after-sales remote support to end customers across geographically dispersed installations.
- Utilities & Water Treatment: Monitor and adjust control logic at unmanned pump stations and substations via standard telephone lines.
- Automotive & Manufacturing: Rapid fault diagnosis on production lines during off-shift hours without requiring on-site presence.
- Building Automation: Remote commissioning and parameter adjustment for HVAC and energy management systems.
Engineering Advantages
- Zero Additional Hardware at Remote Site: Connects directly to the CPU’s MPI port — no PC or additional gateway required at the remote end.
- Full STEP 7 Functionality: Supports online monitoring, program upload/download, force tables, and diagnostic buffers over the remote link.
- Secure Dial-Up Architecture: Point-to-point ISDN/PSTN connection eliminates exposure to public IP networks, suitable for air-gapped industrial environments.
- Plug-and-Play Integration: Recognized natively by SIMATIC Manager — no additional drivers or configuration software required.
- Backward Compatible: Interoperable with existing S7-300/400 installations without firmware upgrades to the CPU.
System Architecture & Signal Flow
The TS Adapter II connects to the MPI port of the target SIMATIC CPU. On the engineering side, a standard PC running SIMATIC Manager / STEP 7 dials into the adapter via an ISDN terminal adapter or analog modem. The adapter transparently bridges the MPI bus protocol over the telephone network, presenting the remote CPU as a locally connected node to the STEP 7 environment. Typical call setup time is under 30 seconds on ISDN; the adapter auto-answers incoming calls and maintains the session until the engineering PC terminates the connection.
[Engineering PC + STEP 7]
|
[ISDN / PSTN Modem]
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[Telephone Network]
|
[6ES7972-0CB35-0XA0]
|
[MPI Port – S7-300/400 CPU]
Sourcing & Quality Verification
- OEM Origin: All units sourced from authorized Siemens distribution channels or verified surplus with full traceability documentation.
- Pre-Shipment Inspection: Each unit undergoes visual inspection, label verification (part number, firmware revision, date code), and functional power-on check.
- Packaging Integrity: Shipped in anti-static packaging with original Siemens labeling where available; ESD-safe secondary packaging for all units.
- Counterfeit Mitigation: Part numbers, holographic labels, and PCB markings verified against Siemens reference standards prior to listing.
- Documentation: Certificate of conformity and inspection report available upon request for regulated industries.
Procurement Process
- Confirm Part Number: Verify 6ES7972-0CB35-0XA0 against your BOM or existing installation documentation.
- Request Quote: Contact [email protected] for volume pricing, lead time confirmation, and availability.
- Order Placement: Purchase directly via this product page or submit a formal PO to our procurement team.
- Shipping: Standard lead time 1–3 business days for in-stock units; express DHL/FedEx options available for urgent requirements.
- After-Sales Support: 30-day return window for DOA units; technical support available via email and phone.
Technical FAQ
Q: Is the 6ES7972-0CB35-0XA0 compatible with S7-1200 or S7-1500?
A: No. This adapter is designed exclusively for SIMATIC S7-300 and S7-400 CPUs with MPI ports. S7-1200/1500 use PROFINET and require different remote access solutions (e.g., SCALANCE M or CP 1243).
Q: Can it be used over VoIP lines?
A: VoIP compatibility is not guaranteed. Siemens recommends dedicated ISDN or analog PSTN lines for reliable operation. VoIP-induced latency and packet loss may cause connection instability.
Q: What STEP 7 version is required?
A: STEP 7 V5.3 or higher is recommended. The adapter is not compatible with TIA Portal natively.
Q: Does the adapter support simultaneous multi-user access?
A: No. The TS Adapter II supports a single point-to-point connection at a time. For multi-user remote access, consider SIMATIC Remote Access solutions.
Q: Is a replacement available if the unit is discontinued?
A: Siemens has introduced newer teleservice solutions; however, the 6ES7972-0CB35-0XA0 remains available as spare/MRO stock. Contact Konmask for long-term supply agreements.
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