Siemens 6SL3352-1AG38-8FA1 Replacement for S120 Chassis

Product Overview

Siemens 6SL3352-1AG38-8FA1 Replacement for S120 Chassis: Smooth Transition from Legacy Drive Systems

The Siemens 6SL3352-1AG38-8FA1 is a SINAMICS S120 Chassis-format Motor Module rated at 380 A, designed for high-power axis control in demanding industrial automation environments. Whether you are retiring an aging SINAMICS S120 Booksize line-up, decommissioning a legacy MASTERDRIVES MC or SIMOVERT MASTERDRIVES VC system, or simply replacing a failed power stage in an existing S120 Chassis cabinet, this module provides a verified, drop-in upgrade path that minimises engineering rework and production downtime.

At TOPNLMS, we stock the 6SL3352-1AG38-8FA1 as a tested, ready-to-ship unit with full traceability documentation. Every unit undergoes pre-shipment functional verification before dispatch from our Xiamen warehouse, ensuring you receive a module that is ready for immediate installation and commissioning.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration to the 6SL3352-1AG38-8FA1 rarely involves the Motor Module alone. In practice, field engineers replacing a Chassis Motor Module in an S120 drive cabinet will also need to verify or upgrade several adjacent components to ensure system-level compatibility.

The CU320-2 DP Control Unit or CU320-2 PN Control Unit serves as the central intelligence of the S120 Chassis system, coordinating all axis modules over DRIVE-CLiQ. If your existing CU320 (first generation) is running firmware below V4.x, a firmware upgrade or control unit replacement is strongly recommended before commissioning the new Motor Module. Alongside the control unit, the 6SL3300-series Active Line Module (ALM) — for example the 6SL3330-7TE38-4AA3 — provides the regulated DC bus voltage that feeds the Motor Module; verifying ALM capacity against the new 380 A rating is a mandatory pre-commissioning step.

On the feedback side, the SMC30 Sensor Module Cabinet-Mounted is the standard interface for resolvers and TTL/HTL incremental encoders when a direct DRIVE-CLiQ motor encoder is not available. For systems migrating from older MASTERDRIVES VC cabinets that used analogue tachometers, the SMC30 provides the necessary signal conversion without rewiring the motor terminal box. The DRIVE-CLiQ hub module DMC20 is equally important in multi-axis cabinets where DRIVE-CLiQ topology needs to be extended across multiple Motor Modules and sensor modules without consuming all CU320-2 DRIVE-CLiQ ports.

Power distribution within the cabinet typically relies on the 6SL3362-series DC bus adapter set and associated busbar kits to connect the ALM DC output to the Motor Module DC input terminals. Correct busbar sizing for 380 A continuous current is critical to avoid thermal derating. For installations where the existing cabinet uses a 6SL3000-series line filter or line reactor, these components remain compatible with the Chassis platform and should be retained to protect the ALM from mains-borne transients.

Finally, for programming and parameter transfer during retrofit, the STARTER commissioning software (or its successor, SINAMICS Startdrive within TIA Portal V16+) is the standard tool for uploading drive parameters, running motor identification routines, and verifying DRIVE-CLiQ topology. If your maintenance team is migrating parameter sets from an older S120 project, Startdrive’s import wizard supports direct project migration from STARTER, significantly reducing re-commissioning time on the shop floor.

Retrofit Guidance FAQ

Q: Can I reuse existing motor power cables when replacing the Motor Module?
A: Yes. The U2/V2/W2 motor output terminals on the 6SL3352-1AG38-8FA1 follow standard IEC terminal labelling. Provided cable cross-sections are rated for 380 A and existing cable glands fit the Chassis enclosure, no rewiring of the motor side is required. Always verify PE/ground continuity before energising.

Q: Is the DRIVE-CLiQ cable from my old Motor Module reusable?
A: Standard DRIVE-CLiQ cables (6FX2002-series or 6FX5002-series) are fully reusable provided connectors are undamaged. The DRIVE-CLiQ protocol is version-agnostic at the physical layer; the CU320-2 will automatically detect and enumerate the new Motor Module on power-up.

Q: Do I need to re-run motor identification after swapping the Motor Module?
A: Yes. Siemens recommends running a stationary motor identification (p1910) after any Motor Module replacement to recalibrate current controller gains for the specific power stage characteristics of the new unit. This takes approximately 5–10 minutes with the motor shaft free to rotate.

Q: What happens to my existing PROFIBUS address configuration?
A: PROFIBUS addressing is managed by the CU320-2 Control Unit, not the Motor Module. Your existing PROFIBUS DP address and GSD-based PLC configuration (e.g. in Siemens S7-300, S7-400, or S7-1500 with DP master) remain unchanged. No PLC program modifications are required for a like-for-like Motor Module swap.

Q: How much physical space does the Chassis Motor Module require compared to a Booksize unit?
A: Chassis-format modules are significantly larger than Booksize units. The 6SL3352-1AG38-8FA1 requires a dedicated cabinet section with forced-air cooling (fan tray included). Ensure a minimum clearance of 100 mm above and below the module for airflow, and verify that the cabinet’s thermal management system can handle the module’s heat dissipation at full load.

Warranty Assurance

Every 6SL3352-1AG38-8FA1 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of shipment. Our pre-shipment inspection process includes DC bus insulation resistance testing, DRIVE-CLiQ port enumeration verification, and visual inspection of all power terminals and cooling components. Units that do not pass inspection are quarantined and never dispatched.

In the event of a warranty claim, our after-sales team responds within 24 business hours. We support replacement-before-return arrangements for verified warranty cases to minimise your production downtime. All warranty units are shipped with full documentation including test records, serial number traceability, and country-of-origin certification (Germany).

For procurement teams managing critical spare parts programmes, we offer reserved stock agreements and priority dispatch for repeat customers. Lead time for standard orders is 3–7 business days from payment confirmation, with express air freight options available for urgent requirements.

Contact our technical sales team to confirm compatibility with your specific drive cabinet configuration before placing your order.