Siemens 6SL3210-1KE18-8UP1 Retrofit-Ready Motor Module for S120 Control Systems
The Siemens 6SL3210-1KE18-8UP1 is a 4 kW Booksize Single Motor Module from the SINAMICS S120 drive series, engineered for high-performance vector control in industrial automation environments. As legacy S120 installations age and original spare parts become increasingly difficult to source, this module serves as a verified retrofit-ready replacement — enabling engineers to restore or upgrade existing control systems without redesigning the entire drive cabinet.
Whether you are replacing a failed unit on a production line, upgrading an aging multi-axis drive system, or migrating from an earlier SIMOVERT MASTERDRIVES platform, the 6SL3210-1KE18-8UP1 integrates directly into existing S120 Booksize configurations. It operates from a shared DC bus supplied by a compatible Siemens 6SL3130 Active Line Module or 6SL3100 Smart Line Module, and communicates via the DRIVE-CLiQ interface — the same high-speed serial protocol used across the S120 family for encoder feedback, motor data identification, and drive-to-controller synchronization.
Upgrade Compatibility Table
| Parameter | Details |
|---|---|
| SKU / Order Number | 6SL3210-1KE18-8UP1 |
| Series | SINAMICS S120 Booksize |
| Rated Output Power | 4 kW |
| DC Bus Interface | Shared DC bus (Booksize format) |
| Communication Interface | DRIVE-CLiQ (×2 ports) |
| Encoder Interface | Via SMC (Sensor Module Cabinet-Mounted) |
| Installation Format | Booksize — mounts on standard S120 Booksize backplane |
| Cooling Method | Forced air (internal fan) |
| Compatible Line Modules | 6SL3130 Active Line Module, 6SL3100 Smart Line Module |
| Compatible Controllers | SINUMERIK 840D sl, SIMOTION D, CU320-2 Control Unit |
| Retrofit Compatibility | Direct replacement for same-rating S120 Booksize Motor Modules |
| Commissioning Tool | STARTER / SINAMICS Startdrive (TIA Portal) |
| Warranty | 12 Months |
Retrofit Planning for Existing Automation Systems
Integrating the 6SL3210-1KE18-8UP1 into an existing S120 installation requires a structured approach to avoid commissioning errors and unplanned downtime. Before removing the failed or obsolete module, engineers should document the current drive topology using the STARTER commissioning software or export the project from SINAMICS Startdrive within TIA Portal. This backup preserves all parameter sets, motor data, speed ramps, and closed-loop control configurations.
On the hardware side, verify that the existing Booksize backplane or drive line-up has sufficient DC bus capacity for the replacement module. The 6SL3210-1KE18-8UP1 draws from the shared DC bus, so the upstream 6SL3130 Active Line Module must be rated to support the aggregate load of all connected Motor Modules. If the line-up also includes a 6SL3210-1KE21-3UP1 (5.5 kW) or 6SL3210-1KE22-6UP1 (11 kW) module on the same bus, recalculate total DC bus loading before proceeding.
Terminal wiring on the 6SL3210-1KE18-8UP1 follows the standard S120 Booksize pinout. Motor power connections (U2, V2, W2) and the PE terminal must be re-torqued to specification. If the original installation used a Siemens SMC30 Sensor Module for encoder feedback, confirm that the encoder cable shield is properly grounded at the cabinet entry point to prevent EMC interference after replacement. For systems using a 6SL3055-0AA00-5AA3 DRIVE-CLiQ Hub Module to fan out DRIVE-CLiQ connections, verify that the hub firmware version is compatible with the replacement module’s firmware level.
Module address assignment in S120 is handled automatically via DRIVE-CLiQ topology recognition. However, if the replacement module is inserted into a different slot position than the original, the CU320-2 Control Unit may flag a topology mismatch. In this case, use STARTER or Startdrive to perform a topology comparison and accept the new configuration before re-enabling the drive. For multi-axis systems controlled by a SIMOTION D445 or SINUMERIK 840D sl, also verify that the axis assignment in the motion program still maps correctly to the physical drive channel after replacement.
If the retrofit involves migrating from an older SIMOVERT MASTERDRIVES MC platform to S120, additional steps are required: the motor nameplate data must be re-entered, a motor identification run (rotating or standstill) must be performed, and the speed controller gains must be re-optimized. HMI screens built on SIMATIC HMI TP700 Comfort or similar panels may require tag remapping if the drive variable addresses have changed during migration.
Downtime Control During System Migration
Minimizing production downtime during a drive module replacement is a primary concern for maintenance teams. The recommended approach is to pre-configure the replacement 6SL3210-1KE18-8UP1 offline using STARTER or Startdrive before the scheduled maintenance window. Load the backed-up parameter file into the new module, verify all motor data entries, and confirm that the firmware version matches the rest of the drive line-up. This pre-commissioning step can reduce on-site swap time to under 30 minutes for experienced engineers.
During the physical swap, isolate the affected axis by disabling the corresponding enable signal from the CU320-2 Control Unit or the PLC (typically a SIMATIC S7-1500 or S7-300 sending enable commands via PROFINET or PROFIBUS). Do not power down the entire drive line-up unless necessary — the shared DC bus allows individual Motor Modules to be safely isolated while adjacent axes remain operational, preserving overall system continuity.
After physical installation, perform a DRIVE-CLiQ topology scan, accept the new module, restore the parameter set, and execute a brief no-load test run before reconnecting the mechanical load. Document the commissioning date and firmware version for warranty and maintenance records. All units supplied by SMARTNEXMSK are pre-tested prior to shipment and covered by a 12-month warranty from the date of delivery.
Retrofit Support FAQ
Q1: Is the 6SL3210-1KE18-8UP1 a direct drop-in replacement for other 4 kW S120 Booksize Motor Modules?
Yes. The 6SL3210-1KE18-8UP1 is dimensionally and electrically compatible with other 4 kW S120 Booksize Single Motor Modules sharing the same DC bus interface and DRIVE-CLiQ pinout. Always verify firmware compatibility and perform a topology scan after installation.
Q2: What commissioning steps are required after replacing the module?
After physical installation, connect via STARTER or SINAMICS Startdrive, perform a DRIVE-CLiQ topology scan, restore the backed-up parameter set, run a motor identification if motor data was lost, and conduct a no-load test run before resuming production. For SINUMERIK or SIMOTION-controlled axes, verify axis-to-drive channel mapping in the motion controller.
Q3: Can this module be used with both PROFINET and PROFIBUS control architectures?
The 6SL3210-1KE18-8UP1 communicates internally via DRIVE-CLiQ to the CU320-2 Control Unit. The fieldbus protocol (PROFINET or PROFIBUS) is determined by the Control Unit, not the Motor Module itself. This module is therefore compatible with both PROFINET and PROFIBUS-based control architectures when paired with the appropriate CU320-2 variant.
Q4: What does the 12-month warranty cover, and how is it validated?
All units are functionally tested prior to shipment. The 12-month warranty covers manufacturing defects and functional failures under normal operating conditions. Warranty is validated from the invoice date. Contact sales@smartnexmsk.com with your order number and a fault description to initiate a warranty claim. Physical damage, incorrect installation, or operation outside rated parameters are excluded.
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