Siemens 6AV6671-5AE00-0AX0 HMI Mobile Panel – Obsolete SIMATIC Spare Part

Technical Dossier

Product Details And Specifications

Siemens 6AV6671-5AE00-0AX0 HMI Mobile Panel – Obsolete SIMATIC Spare Part

DriveKNMS reviews sourcing status and documentation for this model during RFQ handling before quotation.

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Solving the Discontinued Hardware Crisis

The 6AV6671-5AE00-0AX0 was designed for direct integration into SIMATIC S7-300 and S7-400 control architectures — systems that remain operational in thousands of manufacturing facilities across automotive, chemical, food processing, and heavy industry sectors. The panel's MPI/PROFIBUS DP interface, combined with its integrated three-position enabling device and hardwired emergency stop, made it a standard component in machine-level safety circuits.

Siemens has discontinued this model and its direct successors have shifted to PROFINET-based communication. Retrofitting a PROFINET-capable panel into an existing MPI/PROFIBUS machine requires hardware adapters, updated firmware on the PLC side, and re-validation of safety functions — a process that typically takes 3 to 6 weeks of engineering time per machine. For a facility with 20 or 30 such machines, the cumulative cost of forced migration is substantial.

Condition & Reliability Assurance

Discontinued HMI panels present specific failure risks that differ from standard wear items. Our 5-step QA process is designed around the known degradation patterns of this product family:

• Step 1 – Electrolytic Capacitor Inspection: Capacitors on the power supply board are tested for ESR and capacitance drift. Units showing degradation beyond 20% of rated value are flagged for component-level repair before dispatch.
• Step 2 – Firmware Version Verification: The installed firmware version is documented and cross-referenced against known compatibility matrices for S7-300/400 systems. Mismatched firmware is a common source of communication faults on legacy networks.
• Step 3 – Pin and Connector Corrosion Check: All interface connectors — MPI port, power input, and enabling device socket — are inspected under magnification for oxidation and mechanical damage. Corroded contacts are cleaned or the connector assembly is replaced.
• Step 4 – Display and Touchscreen Functional Test: The display is powered and tested for dead pixels, backlight uniformity, and touch response across the full active area.
• Step 5 – Safety Circuit Continuity Test: The enabling device and emergency stop circuit are tested for correct switching behavior across all three positions of the enabling switch.

Key Features for System Maintenance

• Drop-in Replacement: The 6AV6671-5AE00-0AX0 installs directly into existing cable infrastructure. No wiring modifications, no PLC program changes, no re-commissioning of safety functions.
• No Reprogramming Required: HMI project files created in ProTool or WinCC flexible are fully compatible. The replacement unit loads the existing project without modification.
• Avoids Engineering Reconstruction Costs: Substituting a non-identical panel triggers a change management process under most quality systems (ISO 9001, IATF 16949). Using an identical replacement unit keeps the machine's technical documentation valid and avoids a formal re-qualification cycle.
• Extends Asset Life Without Capital Expenditure: Maintaining the existing control architecture with verified spare parts is consistently the lowest-cost option for facilities not yet scheduled for full automation renewal.

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

Q: Can you support multi-unit or repeat RFQ requests?
A: Yes. Send the model list, target quantity and destination so DRIVEKNMS can review sourcing options and quote the requirement as a project RFQ.