Siemens 6SL3352-6TG32-2AA3 Replacement for S120

Product Overview

Siemens 6SL3352-6TG32-2AA3 Replacement/Upgrade Solution for SINAMICS S120: Seamless Transition from Legacy Drive Systems

The Siemens 6SL3352-6TG32-2AA3 is a high-power Chassis Power Module within the SINAMICS S120 drive platform, designed for demanding industrial motion control and variable-speed drive applications. Whether your facility is retiring an aging SINAMICS S120 Booksize or Chassis installation, replacing a discontinued predecessor module, or consolidating a multi-axis drive cabinet, this unit delivers a verified drop-in upgrade path with minimal engineering rework.

At TOPNLMS, we stock the 6SL3352-6TG32-2AA3 as a tested, ready-to-ship replacement component. Our inventory supports urgent breakdowns, planned maintenance windows, and phased modernization projects across manufacturing, metals, paper, mining, and process industries worldwide.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration from a legacy drive system to the 6SL3352-6TG32-2AA3 rarely involves replacing a single component in isolation. In practice, field engineers upgrading from older SINAMICS S120 Chassis installations or from discontinued SIMOVERT MASTERDRIVES systems will typically need to evaluate several adjacent components to ensure a complete, stable retrofit.

The CU320-2 DP Control Unit or CU320-2 PN Control Unit is the most common companion upgrade. If your existing CU320 (first generation) is running firmware below V4.x, it may not fully support the DRIVE-CLiQ topology required by this Power Module. Upgrading the control unit simultaneously eliminates firmware incompatibility and reduces commissioning time significantly.

On the communications side, plants transitioning from PROFIBUS DP to PROFINET will need to verify that the CBE20 Communication Board Extension is installed in the CU320-2 PN slot. For sites retaining PROFIBUS, the existing DP cable and GSD file can typically be reused with minor parameter adjustments in STARTER or TIA Portal.

Power supply integrity is critical in Chassis installations. The 6SL3100-1BE31-3AA0 Line Module (or equivalent Active/Basic Line Module for the target power rating) must be verified for compatibility with the new Power Module’s DC bus current demand. In many aging cabinets, the Line Module is replaced concurrently to avoid nuisance trips caused by undersized DC link capacitance.

For multi-axis systems, the SINAMICS S120 Motor Module (single-axis or double-axis Chassis format) connected downstream on the DC bus must also be checked. Mismatched firmware versions between the Power Module, Motor Modules, and Control Unit are the leading cause of DRIVE-CLiQ topology faults during first power-up after a retrofit.

Wiring adaptation is straightforward in most cases, but engineers should inspect the SMC30 Sensor Module Cabinet-Mounted or SME20/SME25 Sensor Module External Encoder connections if the motor feedback system is being retained from the legacy installation. DRIVE-CLiQ encoder cables are not interchangeable with older HTL/TTL encoder wiring without an adapter module.

Cabinet space planning should account for the SINAMICS S120 Chassis Braking Module if regenerative braking or emergency stop deceleration is part of the application profile. In older cabinets, the braking resistor and chopper may have been external; the S120 Chassis platform integrates this more cleanly but requires dedicated cabinet real estate.

Finally, for sites that rely on operator panels or local HMI interfaces mounted on the control cabinet door, the BOP20 Basic Operator Panel or a Siemens SIMATIC HMI KTP series panel connected via PROFINET provides a modern, supported interface that replaces obsolete OP1S or SDP panels from earlier drive generations.

TOPNLMS can supply all of the above companion components. Contact our technical sales team to request a complete bill-of-materials review for your specific retrofit project.

Retrofit Guidance FAQ

Q: Can I reuse my existing motor power cables when replacing with the 6SL3352-6TG32-2AA3?
A: In most cases, yes. The Chassis Power Module uses standard screw-type power terminals compatible with the same cable cross-sections as predecessor models. Verify terminal torque specifications in the SINAMICS S120 Hardware Installation Manual (HIM) before re-terminating. Shield grounding must comply with EMC requirements — inspect existing cable glands and shield clamps for condition.

Q: Do I need to reprogram my SINAMICS S120 application after swapping the Power Module?
A: The drive application program (STARTER project or TIA Portal Safety Integrated project) is stored on the Control Unit (CU320-2), not the Power Module. Replacing the Power Module alone does not erase the application. However, you must perform a DRIVE-CLiQ topology re-identification after installation and confirm that all component firmware versions are consistent. A full function test including ramp-up, speed reference tracking, and fault response is mandatory before returning the machine to production.

Q: Is PROFIBUS DP still supported with this Power Module?
A: The 6SL3352-6TG32-2AA3 Power Module communicates with the Control Unit via DRIVE-CLiQ internally. PROFIBUS DP connectivity to the PLC (e.g., Siemens SIMATIC S7-300, S7-400, or S7-1500) is handled at the Control Unit level. The CU320-2 DP natively supports PROFIBUS DP; no additional hardware is required if your plant network remains on PROFIBUS.

Q: What physical space is required in the control cabinet?
A: The 6SL3352-6TG32-2AA3 is a Chassis-format module. Verify the exact height, width, and depth dimensions against your cabinet cutout using the Siemens SINAMICS S120 Chassis dimension drawings. Minimum air clearance above and below the unit must be maintained per the cooling requirements. Do not install adjacent to high-heat components without verified thermal modeling.

Q: How do I handle the transition from an older SIMOVERT MASTERDRIVES installation?
A: Migration from SIMOVERT MASTERDRIVES to SINAMICS S120 is a platform change, not a direct swap. The control unit, motor modules, and communication interfaces all differ. TOPNLMS recommends a phased approach: replace the Power Module and Control Unit first, retain existing motor and feedback wiring where possible, and use Siemens STARTER or TIA Portal to re-commission the drive from a baseline parameter set. Our technical team can provide a migration checklist on request.

Q: What spare parts should I stock alongside this Power Module?
A: For Chassis installations, recommended critical spares include: internal cooling fans (available as a separate Siemens spare kit), DC bus fuses, DRIVE-CLiQ cables (various lengths), and a spare CU320-2 Control Unit if the application is mission-critical. TOPNLMS can supply all of these items with the same 12-month warranty.

Warranty Assurance

Every 6SL3352-6TG32-2AA3 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Our pre-shipment inspection process includes visual examination, label and nameplate verification, and where applicable, functional power-on testing. Units are packed in anti-static, shock-resistant packaging with full photographic documentation of condition before dispatch.

In the event of a warranty claim, TOPNLMS provides a straightforward replacement or repair process. Contact our after-sales team within the warranty period with your order number and a description of the fault. We target an initial response within 24 business hours and aim to dispatch a replacement unit within 3–5 business days for stocked items.

Our procurement guarantee covers authenticity: all units are sourced through verified supply channels. We do not sell counterfeit, re-labeled, or refurbished-as-new components. If you require a certificate of conformity, test report, or customs documentation for your procurement process, please request these at the time of order.

For large-volume orders, blanket purchase agreements, or project-based procurement with staged delivery, contact our B2B sales desk to discuss terms. We support EXW, FOB Xiamen, and CIF delivery terms with full export documentation.