Siemens 6SL3350-6TK00-0EA0 Replacement for SINAMICS S120

Product Overview

Siemens 6SL3350-6TK00-0EA0 Replacement for SINAMICS S120: Seamless Transition & Legacy System Compatibility

The Siemens 6SL3350-6TK00-0EA0 (firmware reference A5E02144966) is the Drive Control Module (DCM) at the heart of the SINAMICS S120 multi-axis drive platform. When your existing DCM fails, reaches end-of-life, or your plant is migrating away from an older SINAMICS S120 booksize cabinet unit, this module provides a verified drop-in replacement path that preserves your existing wiring harness, DRIVE-CLiQ topology, and commissioned parameter sets — dramatically reducing unplanned downtime and re-commissioning effort.

Industrial facilities running legacy Siemens drive architectures — including earlier SINAMICS S120 Control Units such as the CU320-2 DP or CU320-2 PN — frequently encounter situations where the Drive Control Module is the single point of failure in an otherwise healthy cabinet. Rather than replacing the entire drive line-up, substituting the 6SL3350-6TK00-0EA0 restores full axis control while retaining the existing Motor Modules (booksize or chassis format), Line Modules, and associated Sensor Modules already installed on the shared DC bus.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful SINAMICS S120 drive system migration rarely involves a single component. When replacing the 6SL3350-6TK00-0EA0 Drive Control Module, the following associated components are commonly evaluated or replaced in parallel to ensure system-level compatibility and long-term reliability:

The SINAMICS S120 CU320-2 PN Control Unit is the supervisory controller that communicates with the DCM over DRIVE-CLiQ. If the CU320-2 PN firmware version is significantly older than the replacement DCM, a coordinated firmware alignment is recommended — and in some retrofit projects, the Control Unit itself is upgraded simultaneously. Similarly, the Active Line Module (ALM) — for example the 6SL3130-series — feeds the shared DC bus that powers all Motor Modules in the cabinet; verifying its compatibility with the restored DCM is a standard commissioning step.

On the motor side, SINAMICS S120 Single Motor Modules (booksize, e.g. 6SL3120-series) connect directly to the DCM via DRIVE-CLiQ and must be recognized during the topology scan after module replacement. If the existing Motor Modules are also approaching end-of-life, this replacement event is an ideal opportunity to refresh them. Sensor Modules Cabinet-Mounted (SMC) — such as the SMC20 or SMC30 — handle encoder feedback from servo motors and are part of the same DRIVE-CLiQ chain; their firmware and wiring should be verified during re-commissioning.

For facilities migrating from older SIMOVERT MASTERDRIVES or early SINAMICS S120 generations, the SINAMICS S120 Terminal Module TM31 provides additional analog and digital I/O expansion without requiring changes to the main control program. The SINAMICS S120 Voltage Sensing Module (VSM10) is another component frequently inspected during a DCM swap, as it monitors line voltage for the ALM and must remain correctly configured post-replacement.

Programming and commissioning tools are equally important: the STARTER commissioning software (or its successor within TIA Portal with Startdrive) is used to upload the existing parameter backup, run the drive topology recognition, and validate axis behavior before returning the machine to production. A SINAMICS S120 CompactFlash Card pre-loaded with the backed-up project file can reduce on-site commissioning time to under two hours. Finally, DRIVE-CLiQ cables (pre-assembled, various lengths) and 24 VDC SITOP power supply modules are standard consumables that should be on hand during any DCM replacement to avoid secondary delays.

Retrofit Guidance FAQ

Q: Will my existing wiring need to be modified?
No. The 6SL3350-6TK00-0EA0 uses the same connector positions and pinout as the original DCM. The 24 VDC control supply, DRIVE-CLiQ ribbon cables, and any signal connectors attach identically. No rewiring is required.

Q: Can I restore my existing drive parameters without re-commissioning from scratch?
Yes. If you have a STARTER or TIA Portal Startdrive project backup, or a CompactFlash card with the last saved parameter set, you can upload the configuration to the replacement module and run a topology recognition. In most cases, the drive is operational within the same maintenance window.

Q: Is PROFIBUS DP or PROFINET communication affected by the module swap?
No. The fieldbus interface resides on the Control Unit (e.g. CU320-2 DP or CU320-2 PN), not on the DCM itself. Replacing the Drive Control Module does not change the PLC-to-drive communication path, and no changes to the STEP 7 or TIA Portal hardware configuration are required.

Q: What if my cabinet has limited space — does this module fit the same slot?
Yes. The 6SL3350-6TK00-0EA0 is a booksize format module with the same physical dimensions as the original DCM. It mounts on the same DIN rail position within the SINAMICS S120 booksize cabinet without any mechanical modification.

Q: My system uses an older SINAMICS S120 firmware version. Is there a compatibility risk?
Firmware compatibility should be verified against your CU firmware version using the Siemens compatibility matrix. TOPNLMS recommends confirming the firmware pairing before installation. If needed, we can advise on compatible firmware versions based on your CU type and project requirements.

Q: Can this module replace a unit from a different Siemens drive series?
The 6SL3350-6TK00-0EA0 is specific to the SINAMICS S120 platform. It is not a direct replacement for SIMOVERT MASTERDRIVES MC or SINAMICS S150 components, though it may be part of a broader platform migration project where older drive generations are retired in favor of the S120 architecture.

Warranty Assurance

Every 6SL3350-6TK00-0EA0 unit shipped by TOPNLMS carries a 12-month warranty covering manufacturing defects and functional failures under normal operating conditions. Prior to dispatch, each module undergoes a pre-shipment functional inspection to verify power-on behavior, DRIVE-CLiQ port integrity, and connector condition. Units are packed in anti-static ESD-safe packaging with foam cushioning to prevent transit damage.

In the event of a warranty claim, TOPNLMS provides a replacement or repair resolution. Our after-sales response target is within 1 business day for initial diagnosis support. We maintain stock of common SINAMICS S120 components to support rapid exchange, minimizing the impact on your production schedule.

For procurement teams, we issue a formal invoice, packing list, and certificate of conformity with each shipment. Lead times, bulk pricing, and consignment stock arrangements are available for MRO and OEM customers. Contact our team to discuss your specific project requirements.