Siemens 6SL3120-1TE32-0AA3 Retrofit Double Motor Module

Siemens 6SL3120-1TE32-0AA3 Retrofit Double Motor Module: Legacy-Compatible Upgrade for SINAMICS S120 Drive Systems

The Siemens 6SL3120-1TE32-0AA3 is a Double Motor Module belonging to the SINAMICS S120 Booksize format drive family. Rated at 2 × 16 A output current, this module is designed to control two separate servo or induction motor axes from a single booksize slot, making it a compact and efficient solution for multi-axis machine tool, packaging, and process automation applications. As legacy S120 Booksize systems age and original modules become increasingly difficult to source through standard distribution channels, the 6SL3120-1TE32-0AA3 has become a critical retrofit and spare parts target for maintenance engineers managing aging production lines.

NINERMAS maintains verified stock of the 6SL3120-1TE32-0AA3 with full pre-shipment functional testing, 12-month warranty coverage, and rapid international dispatch. Each unit is inspected against Siemens factory specifications before release, ensuring that replacement modules arrive ready for installation without additional bench testing delays on the customer side.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

When planning a retrofit or emergency replacement of the 6SL3120-1TE32-0AA3 within an existing SINAMICS S120 Booksize cabinet, engineers must account for several interdependent components and system-level factors. The S120 Booksize architecture relies on a shared DC bus supplied by a Line Module — typically an Active Line Module such as the 6SL3130-7TE21-6AA3 or a Basic Line Module — and the Double Motor Module draws directly from this common DC link. Before swapping the 6SL3120-1TE32-0AA3, it is essential to verify that the existing Line Module’s power capacity is sufficient to support both axes simultaneously under peak load conditions, particularly if the original system was operating near its rated capacity.

The DRIVE-CLiQ topology must also be carefully mapped prior to removal. The 6SL3120-1TE32-0AA3 connects to the Control Unit — typically a CU320-2 DP or CU320-2 PN — via DRIVE-CLiQ cables, and each motor encoder (SMC20 or SMC30 Sensor Module Cabinet-Mounted) is daisy-chained through the module. Disconnecting the module without first documenting the DRIVE-CLiQ node addresses and encoder assignments can result in topology errors during recommissioning. Engineers should export the drive project from STARTER or SINAMICS Startdrive before beginning any hardware swap.

Terminal wiring at the motor output terminals (U2, V2, W2 for axis 1 and U3, V3, W3 for axis 2) should be photographed and labeled before disconnection. Cable cross-sections and shielding arrangements must comply with the original installation to avoid EMC issues after reinstatement. If the cabinet also contains a Voltage Sensing Module (VSM10) or a Braking Module (6SL3100-1BE31-0AA0), their connections to the DC bus bar must remain undisturbed during the motor module exchange.

For sites running PROFIBUS DP communication through the CU320-2 DP, the drive address settings stored in the Control Unit are not affected by a motor module swap, but the axis parameter sets (drive objects DO2 and DO3) must be verified post-replacement to confirm that current limits, speed limits, encoder resolution, and motor data sets are correctly loaded. If the replacement 6SL3120-1TE32-0AA3 carries a different hardware revision suffix, a firmware update via SINAMICS Startdrive may be required to align the module with the existing project version.

Sites using SIMATIC S7-300 or S7-400 PLCs with PROFIBUS DP integration should verify that the GSD file version loaded in STEP 7 or TIA Portal matches the firmware level of the replacement module. For newer installations migrating toward PROFINET IO via the CU320-2 PN, the 6SL3120-1TE32-0AA3 is fully compatible and no hardware changes to the motor module itself are required — only the Control Unit and network configuration need to be updated. HMI screens built on SIMATIC WinCC or WinCC Flexible that display axis status, fault codes, and speed feedback will continue to function without modification, as the drive object structure remains consistent across hardware revisions of the same module type.

Downtime Control During System Migration

Minimizing unplanned downtime during a 6SL3120-1TE32-0AA3 replacement requires a structured pre-outage preparation process. The most effective approach is to perform a full parameter backup of the CU320-2 using the STARTER “Save to File” function or the Startdrive project archive before the maintenance window begins. This backup captures all drive object parameters, motor data sets, encoder configurations, and communication settings, enabling rapid restoration if the replacement module requires re-parameterization.

During the physical swap, the DC bus capacitors in the Line Module and adjacent Power Modules retain charge for several minutes after mains disconnection. Engineers must follow the standard S120 discharge waiting period — typically five minutes after the DC link LED extinguishes — before touching bus bar connections or module terminals. Using a calibrated voltage meter to confirm DC link discharge below 50 V before contact is mandatory for safe working practice.

Once the replacement 6SL3120-1TE32-0AA3 is seated and DRIVE-CLiQ cables are reconnected in the original topology sequence, the Control Unit will perform an automatic component recognition scan on power-up. If the module hardware revision matches the project expectation, the system will resume normal operation within the standard boot sequence — typically under 90 seconds. If a topology mismatch is detected, the engineer can accept the new component via the STARTER online interface or Startdrive commissioning wizard without requiring a full re-parameterization, provided the parameter backup is available.

For production lines where even a brief interruption is critical, NINERMAS recommends maintaining a pre-tested spare 6SL3120-1TE32-0AA3 on-site as part of a structured spare parts lifecycle program. Pairing this with a documented replacement procedure — including DRIVE-CLiQ topology diagrams, terminal wiring photographs, and a saved STARTER project — reduces mean time to repair (MTTR) to under two hours for experienced drive engineers.

Retrofit Support FAQ

Q1: Is the 6SL3120-1TE32-0AA3 a direct replacement for earlier hardware revisions such as -0AA0 or -0AA1?
Yes. The -0AA3 hardware revision is backward compatible with earlier revisions of the same part number within the SINAMICS S120 Booksize platform. The mechanical footprint, DC bus bar interface, DRIVE-CLiQ connector positions, and motor output terminal layout are identical. A firmware alignment check via SINAMICS Startdrive is recommended after installation to confirm compatibility with the existing project version.

Q2: What pre-shipment testing does NINERMAS perform on the 6SL3120-1TE32-0AA3?
Each unit undergoes a functional load test simulating normal operating conditions, including DC link energization, DRIVE-CLiQ communication verification, and output stage switching checks on both axes. Test results are documented and available upon request. Units that do not pass all test criteria are not dispatched.

Q3: Can this module be used in a PROFINET-based S120 system as well as a PROFIBUS system?
Yes. The 6SL3120-1TE32-0AA3 Double Motor Module is communication-agnostic at the hardware level. The communication protocol (PROFIBUS DP or PROFINET IO) is determined by the Control Unit (CU320-2 DP or CU320-2 PN) and not by the motor module itself. The same 6SL3120-1TE32-0AA3 can therefore be used in either communication environment without modification.

Q4: What warranty and stock availability does NINERMAS offer?
All 6SL3120-1TE32-0AA3 units supplied by NINERMAS carry a 12-month warranty from the date of dispatch, covering functional defects under normal operating conditions. Stock availability is confirmed at the time of order. For critical spare parts programs requiring guaranteed inventory reservation, NINERMAS offers long-term stock arrangement agreements — contact sale@ninermas.com to discuss requirements.