Siemens 6SL3320-1TE32-1AC3 Retrofit-Compatible Motor Module

Siemens 6SL3320-1TE32-1AC3 Retrofit-Compatible Motor Module: Legacy System Compatibility & Smooth Upgrade

The Siemens 6SL3320-1TE32-1AC3 is a booksize format Motor Module within the SINAMICS S120 drive system, rated for a 210 A output current and designed for multi-axis coordinated motion control. As legacy SIMODRIVE 611 and early-generation SINAMICS S120 installations reach end-of-service milestones, the 6SL3320-1TE32-1AC3 has become a critical retrofit and replacement component for engineers tasked with modernizing existing control cabinets without full line shutdowns.

This module operates on the DC link bus shared across the S120 booksize family, accepting a common DC bus feed from a compatible Line Module such as the 6SL3130-series Active Line Module or Smart Line Module. When replacing a failed or obsolete motor module in an existing rack, engineers must verify that the DC link voltage, bus bar connection torque, and cabinet ventilation capacity are sufficient to support the 6SL3320-1TE32-1AC3’s thermal dissipation profile. Inadequate airflow in legacy cabinets is one of the most common causes of premature module failure during retrofit projects.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

Successful integration of the 6SL3320-1TE32-1AC3 into a legacy production line requires a structured pre-retrofit audit. Begin by documenting the existing drive topology: identify the Line Module (typically a 6SL3130-series unit), the Control Unit (CU320-2 DP or CU320-2 PN), and all downstream Motor Modules currently installed on the shared DC bus. The 6SL3320-1TE32-1AC3 communicates exclusively via DRIVE-CLiQ, so any legacy axis using analog speed setpoints or older PROFIBUS-only interfaces will require an intermediate adaptation layer or a CU320-2 PN upgrade to support PROFINET-based motion coordination.

Terminal wiring is a frequent source of commissioning delays. The motor power output terminals (U2, V2, W2) and the motor holding brake connector must be verified against the motor nameplate data. If the existing motor was previously driven by a SIMODRIVE 611 module, the cable cross-section and shielding requirements may differ from S120 specifications — particularly for long cable runs exceeding 50 metres, where output filters or dV/dt reactors may be required to protect motor insulation. A 6SL3000-series output reactor or sine-wave filter should be evaluated during the retrofit planning phase.

The DRIVE-CLiQ topology must be re-mapped after module replacement. Using STARTER or TIA Portal Startdrive, engineers should perform an automatic topology detection to confirm that the 6SL3320-1TE32-1AC3 is correctly identified on the DRIVE-CLiQ ring. The Control Unit’s drive object list must be updated to reflect the new module’s electronic rating plate data. If the project was originally commissioned with an older firmware version, a firmware update to the CU320-2 and all connected Motor Modules — including any 6SL3120-series Single Motor Modules on adjacent axes — should be performed before final parameter download.

For multi-axis systems, the DC link pre-charging sequence managed by the Line Module must be validated after any Motor Module replacement. The 6SL3130-series Active Line Module monitors DC link capacitance during pre-charge; adding or replacing a booksize Motor Module changes the total capacitance on the bus, which may require adjustment of the pre-charge monitoring parameters. Similarly, if the cabinet includes a 6SL3100-series Braking Module for regenerative energy dissipation, its threshold settings should be reviewed to ensure compatibility with the updated drive configuration.

I/O expansion requirements should also be assessed. If the legacy system relied on a 6ES7-series SIMATIC ET 200SP or ET 200M distributed I/O rack for digital and analog signal routing to the drive, the existing PROFIBUS DP or PROFINET configuration in the PLC project (typically a SIMATIC S7-300, S7-400, or S7-1500 controller) must be updated to reflect any changes in drive parameter mapping. Signal isolation between the PLC I/O and the drive’s analog inputs can be maintained using 6ES7-series signal modules or third-party signal isolators where ground loop interference is a concern.

HMI screen updates are often overlooked during drive retrofit projects. If the production line uses a SIMATIC HMI panel — such as a TP700 Comfort or MP377 — with drive status screens linked to specific parameter addresses in the S120 drive object, those screen tags must be re-validated after the module replacement and parameter restore. Changes in drive object numbering or axis assignment within the CU320-2 project can cause HMI communication faults that appear unrelated to the hardware swap.

Downtime Control During System Migration

Minimizing production downtime during a Motor Module replacement on a live SINAMICS S120 system requires careful pre-staging. Before the maintenance window opens, the complete drive project should be backed up from the Control Unit using STARTER’s Upload from target device function or the TIA Portal project comparison tool. This backup preserves all axis parameters, safety function configurations, and DRIVE-CLiQ topology data, enabling a rapid restore if the replacement module requires re-commissioning from scratch.

Where possible, the replacement 6SL3320-1TE32-1AC3 should be pre-parameterized offline using the backed-up project file. Loading the parameter set into the new module before installation — using a laptop with STARTER and a DRIVE-CLiQ USB adapter or a pre-configured memory card — can reduce on-site commissioning time from several hours to under 30 minutes. This approach is particularly valuable in food processing, pharmaceutical, or continuous chemical production environments where extended shutdowns carry significant financial penalties.

During the physical swap, the DC link must be fully discharged before any module is removed from the booksize rail. The discharge time for the S120 booksize DC link capacitors is typically 5 minutes after mains disconnection, but should always be confirmed with a calibrated voltage meter at the DC link test points. After installation of the 6SL3320-1TE32-1AC3, the DRIVE-CLiQ cable routing should be inspected to ensure no cables are pinched or bent beyond the minimum bend radius, as DRIVE-CLiQ signal integrity is critical for stable axis operation.

Post-installation, a controlled test run at reduced speed and load is recommended before returning the axis to full production duty. Monitor the module’s thermal status via the STARTER diagnostics screen and confirm that no fault codes — particularly F07900-series thermal faults or A07910-series overtemperature alarms — appear during the warm-up period. All safety functions (STO, SS1, SLS) should be re-validated in accordance with the site’s functional safety documentation before the machine is released for operator use.

Retrofit Support FAQ

Q1: Is the 6SL3320-1TE32-1AC3 a direct drop-in replacement for earlier 6SL3320-1TE32 variants?
In most cases, yes — the mechanical footprint and DRIVE-CLiQ interface are consistent across the 6SL3320-1TE32 sub-family. However, firmware compatibility between the replacement module and the existing CU320-2 Control Unit should be confirmed before installation. If the Control Unit is running firmware older than V4.7, a firmware update is strongly recommended to ensure full feature compatibility and access to current fault diagnostic codes.

Q2: What commissioning steps are required after replacing the Motor Module?
After physical installation, connect the DRIVE-CLiQ cable and power up the system. Use STARTER or TIA Portal Startdrive to perform an automatic topology detection. Download the backed-up parameter set to the new module, then run a motor identification routine (rotating or standstill measurement) to confirm that the current controller parameters match the connected motor. Validate all safety functions before returning the axis to production.

Q3: Can this module be used with PROFIBUS DP-based control systems?
The 6SL3320-1TE32-1AC3 itself communicates via DRIVE-CLiQ to the Control Unit. The Control Unit (CU320-2 DP variant) then interfaces with the PLC via PROFIBUS DP. If the existing system uses a CU320-2 PN (PROFINET) variant, the PLC network configuration must be updated accordingly. Mixed PROFIBUS/PROFINET environments are supported through the S7 controller’s communication configuration in TIA Portal or STEP 7.

Q4: What warranty and supply terms apply?
All units supplied by NINERMAS are covered by a 12-month warranty against manufacturing defects and operational failure under normal operating conditions. Pre-shipment testing is performed on every unit to verify output current capability, DRIVE-CLiQ communication integrity, and thermal management function. Stock availability is maintained for rapid dispatch; contact our team to confirm lead times for your specific quantity requirement.