Siemens 6SL3244-0BB12-1FA0 Control Unit – Obsolete SINAMICS S120 Spare Part

Technical Dossier

Product Details And Specifications

Siemens 6SL3244-0BB12-1FA0 Control Unit – Obsolete SINAMICS S120 Spare Part

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 SINAMICS S120 platform with CU310-2 DP control is embedded in a wide range of industrial automation installations — from CNC machine tools and printing presses to packaging lines and material handling systems. Many of these installations were commissioned between 2008 and 2016 and remain mechanically sound, with the drive system representing only a fraction of the total asset value.

When Siemens discontinues a control unit, the installed base does not disappear. The machines keep running — until a fault occurs. At that point, the absence of a replacement unit forces a decision: source the obsolete part, or commit to a full system upgrade. For most plant managers, the upgrade path means months of engineering work, significant capital outlay, and the risk of compatibility issues with upstream PLC logic and HMI configurations that were written for the original drive architecture.

Extending the service life of a SINAMICS S120 installation by 5 to 10 years through strategic spare part procurement is not a workaround — it is a defensible asset management strategy. The cost of holding one or two verified spare control units is a fraction of the cost of a single unplanned shutdown. For facilities running multiple S120-equipped machines, a structured obsolescence management program — identifying critical single points of failure and pre-positioning spares — is the difference between a controlled maintenance event and a production crisis.

Condition & Reliability Assurance

Obsolete parts sourced from secondary markets carry inherent risk. Our 5-step QA process is designed to address the specific failure modes associated with aged industrial electronics:

• Step 1 – Visual and Mechanical Inspection: Full external inspection for physical damage, connector pin condition, and housing integrity. Corroded or bent pins are flagged and assessed before any further testing.
• Step 2 – Electrolytic Capacitor Assessment: Aged electrolytic capacitors are a primary failure point in drive control electronics. Units are assessed for capacitor condition; those showing signs of bulging, leakage, or measured ESR deviation are quarantined.
• Step 3 – Firmware Version Verification: The firmware version is documented and cross-referenced against known compatibility requirements for SINAMICS S120 system configurations. Mismatched firmware versions can cause commissioning failures.
• Step 4 – Functional Power-On Test: Where test infrastructure permits, units undergo a controlled power-on sequence to verify basic operational status and communication interface response.
• Step 5 – Packaging and ESD Protection: Units are packaged in anti-static materials with desiccant to prevent moisture ingress during storage and transit.

Key Features for System Maintenance

• Drop-in replacement: The 6SL3244-0BB12-1FA0 installs directly into existing SINAMICS S120 Booksize configurations without mechanical modification.
• No reprogramming required: Drive parameters stored on the existing memory card (if used) transfer directly to the replacement unit, eliminating the need for re-commissioning from scratch.
• Preserves existing PLC and HMI integration: PROFIBUS DP communication configuration remains intact, avoiding costly engineering work to remap drive signals in upstream control systems.
• Avoids system-wide upgrade costs: Replacing a single control unit at component cost is orders of magnitude less expensive than a full drive system migration, including associated mechanical, electrical, and software engineering.
• Supports long-term spare holding: Units can be stored correctly for extended periods, making them suitable for inclusion in a facility's critical spare parts inventory.

Q: How do I know the unit is genuine and not counterfeit?
A: All units are sourced through traceable supply channels. Physical markings, label formatting, and component construction are verified against known-genuine references. We do not supply units that fail authenticity checks.

Q: Can you supply related SINAMICS S120 components?
A: Yes. DriveKNMS sources a range of discontinued SINAMICS S120 components including power modules, line modules, and motor modules. Contact us with your full bill of materials for a consolidated quotation.