Siemens 6SL3120-2TE13-0AD0 Retrofit-Compatible Double Motor Module

Siemens 6SL3120-2TE13-0AD0 Retrofit-Compatible Double Motor Module for Legacy SINAMICS S120 Systems

The Siemens 6SL3120-2TE13-0AD0 is a Double Motor Module designed for the SINAMICS S120 booksize drive system, delivering 3 A output current per axis at 380–480 V AC input. As legacy S120 installations age and original spare parts become increasingly difficult to source, this module serves as a verified retrofit-compatible replacement for discontinued or end-of-life double motor modules within the same S120 booksize family. Whether you are restoring a failed axis in an existing control cabinet, upgrading a multi-axis CNC line, or migrating from an older SINAMICS S120 configuration, the 6SL3120-2TE13-0AD0 provides a reliable, drop-in-compatible solution with minimal re-engineering.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

Integrating the 6SL3120-2TE13-0AD0 into an existing S120 booksize line requires careful pre-migration planning across several subsystems. The first step is verifying DC bus capacity: the Line Module — typically a 6SL3130-series Active Line Module or Basic Line Module — must have sufficient headroom to support the combined power draw of all motor modules on the shared DC bus. If the existing line module is undersized or itself approaching end-of-life, it should be replaced or supplemented before the new double motor module is commissioned.

Terminal wiring is the next critical checkpoint. The 6SL3120-2TE13-0AD0 uses the standard S120 booksize motor output terminals (U2, V2, W2 per axis), and the PE/shield connection must be properly landed to the cabinet’s equipotential bonding rail. If the existing cable harness was routed for an older module revision, verify that cable cross-sections meet the 3 A per axis rating and that shielded motor cables are used to suppress EMI — particularly important in legacy cabinets where cable management may not have been designed to current standards.

The backplane interface relies on the S120 booksize DC bus bar and the 24 V DC electronics power supply, typically sourced from a 6SL3100-series SITOP or S120 power supply module. Confirm that the 24 V rail can support the additional load of the new module’s control electronics. The Drive-CLiQ daisy-chain topology must also be reviewed: the 6SL3120-2TE13-0AD0 occupies two Drive-CLiQ nodes (one per axis), and the Control Unit — such as the CU320-2 DP or CU320-2 PN — must have available Drive-CLiQ ports or the topology must be restructured using a DMC20 Drive-CLiQ Hub Module.

Module addressing and drive object configuration are handled in STARTER or Startdrive. When the new module is inserted into the Drive-CLiQ topology, the Control Unit will detect it automatically during the next power-up or topology scan. The existing drive objects for the two axes must be reassigned to the new module’s hardware slots. If the original project file was created for an earlier module revision, a firmware update on the CU320-2 may be required to ensure full compatibility — Siemens recommends aligning all S120 component firmware to the same release level before commissioning.

Program compatibility is generally maintained at the PLC level: if the motion control application runs on a SIMATIC S7-300, S7-400, or S7-1500 with a 6FC5-series SINUMERIK or a standard S7 motion library, the axis parameters (speed limits, torque limits, encoder scaling) stored in the PLC program remain valid as long as the motor and encoder combination is unchanged. However, if the retrofit also involves replacing the servo motor or switching from an SMC20 Sensor Module Cabinet-Mounted to an integrated encoder interface, the encoder parameterization in the drive project must be updated accordingly.

HMI screens connected via PROFIBUS DP or PROFINET IO to the Control Unit do not require modification for a like-for-like module swap, but if the retrofit is part of a broader migration — for example, moving from PROFIBUS to PROFINET — the OP/TP panel (such as a TP700 Comfort or TP1200 Comfort) may need updated communication settings and revised screen tags. Communication link integrity should be verified with a PROFINET diagnostic scan or a PROFIBUS segment check before the system is returned to production.

Finally, confirm that the physical installation space in the control cabinet accommodates the 6SL3120-2TE13-0AD0’s booksize form factor. The module width must be accounted for in the busbar assembly, and adequate clearance must be maintained above and below the module for airflow. If the cabinet was originally designed for a narrower module, a cabinet extension or rearrangement of adjacent components such as the 6SL3100-series braking resistor connection or the 6SL3000-series line filter may be necessary.

Downtime Control During System Migration

Minimizing production downtime during a double motor module replacement begins with pre-staging. Before the maintenance window opens, the replacement 6SL3120-2TE13-0AD0 should be bench-tested with a known-good Control Unit and a representative motor load to confirm that the module powers up correctly, that both Drive-CLiQ axes are recognized, and that no fault codes are present. This pre-shipment functional test, which is part of the standard outgoing inspection process, reduces the risk of discovering a configuration issue during the live cutover.

The original PLC and drive project files — including the STARTER or Startdrive project, the S7 program blocks, and any SINUMERIK NCK backup — should be archived before any hardware is disturbed. This ensures that if the cutover encounters an unexpected issue, the system can be restored to its previous state without data loss. The Drive-CLiQ topology export from the existing Control Unit provides a reference for re-establishing the correct node order after the new module is installed.

During the physical swap, the DC bus must be fully discharged before the module is removed. The S120 booksize system includes a DC bus discharge indicator, and the discharge time after mains disconnection must be observed — typically five minutes or as indicated on the module label. Once the new 6SL3120-2TE13-0AD0 is seated and the Drive-CLiQ cables are reconnected, the system should be powered up in a controlled sequence: electronics power (24 V) first, then mains power to the Line Module, allowing the Control Unit to perform its topology scan before the axes are enabled.

Field commissioning should begin with a no-load test on each axis — verifying speed reference tracking, current limits, and encoder feedback — before reconnecting the mechanical load. If the application uses safety functions such as STO (Safe Torque Off) or SS1 (Safe Stop 1) via the TM54F Terminal Module or onboard safety inputs, the safety commissioning checksum must be re-validated after any hardware change, in accordance with the machine’s functional safety documentation. Completing this validation within the planned maintenance window keeps the retrofit on schedule and ensures that the machine can be returned to full production without additional safety re-certification delays.

Retrofit Support FAQ

Q1: Is the 6SL3120-2TE13-0AD0 a direct replacement for earlier S120 Double Motor Module revisions?
Yes. The 6SL3120-2TE13-0AD0 is mechanically and electrically compatible with earlier booksize double motor module revisions in the same current class, including the 6SL3120-2TE13-0AA0 and 6SL3120-2TE13-0AB0. A firmware alignment check on the CU320-2 Control Unit is recommended before commissioning to ensure full feature compatibility.

Q2: What commissioning software is required, and is the existing drive project reusable?
Commissioning is performed using Siemens STARTER (offline/online) or Startdrive within TIA Portal V14 or later. Existing drive project files are generally reusable; the drive objects for the two axes must be reassigned to the new module’s hardware address in the Drive-CLiQ topology. No full re-parameterization is required for a like-for-like replacement.

Q3: How should terminal wiring be verified before installation?
Confirm that the motor output cables (U2/V2/W2 per axis) are rated for the module’s 3 A output, that shielded cables are used, and that the PE/shield termination is correctly bonded. The 24 V electronics supply and DC bus bar connections should be inspected for corrosion or loose contacts, particularly in cabinets that have been in service for more than five years.

Q4: What does the 12-month warranty cover, and what is the stock availability?
All units supplied by NINERMAS carry a 12-month warranty covering manufacturing defects and functional failures under normal operating conditions. Stock is maintained for immediate dispatch, and each unit undergoes a pre-shipment functional test before delivery. For urgent requirements or volume orders, contact sale@ninermas.com or call +0086 187 5021 5667.