Siemens 6SL3120-2TE21-8AC0

The Siemens 6SL3120-2TE21-8AC0 dual-axis servo module features a powerful output of 18A per axis, a complete set of SIL2-level integrated safety functions, a dual-axis integrated design that saves cabinet space, and microsecond-level inter-axis synchronization performance. It often performs outstandingly in various types of precision automation equipment such as CNC machines, printing and packaging, winding lithium batteries, and gantry mechanical hands. As a supplier, Yueyang Tongtu offers both in-stock models and a wide range of models. You can learn more information through us.

Core Advantages and Functions

Dual-axis Integration:

A single module drives two servo motors. Compared to two separate single-axis modules, it significantly reduces the installation width inside the cabinet while minimizing the number of DC bus connectors and wiring work, effectively reducing EMC interference risks.

Safety Integration:

Built-in SIL2-level safety functions meet the national mechanical safety standards for industries such as machine tools, robots, and packaging machinery, eliminating the need for external safety circuit hardware costs.

Real-time Synchronization:

Relying on the DRIVE-CLiQ high-speed drive bus, the current loop synchronization cycle for the dual axes is extremely short. It perfectly realizes high-precision multi-axis linkage with electronic gears, electronic cams, fly cuts, master-slave following, etc.

Compatibility with All Types of Motors:

The Siemens 6SL3120-2TE21-8AC0 supports 1FK7/1FT6/1PH8 synchronous servo and asynchronous spindle motors, and is compatible with DRIVE-CLiQ encoders and TTL/HTL/SSI external encoders.

Multiple Hardware Protection and Diagnostics:

Product Features

Dual‑axis design: a single module can independently control two motors, offering a more compact footprint compared to using two single‑axis modules.

Integrated safety functions: supports extended Safety Integrated functionality for machine protection requirements.

Internal air cooling: the module has a built‑in fan for heat dissipation to maintain stable operating temperatures.

Includes DRIVE‑CLiQ cable: the package comes with a DRIVE‑CLiQ cable for connecting to the control unit, no separate purchase needed.

Parameter

Our case:

1. The Siemens 6SL3120-2TE21-8AC0 model is a small vertical machining center / milling machine. The drive axis is X/Y linear servo dual-axis linkage, and the third axis spindle is equipped with a single-axis module. The core requirements are contour interpolation, high-speed feed, and the safety standard STO/SS1 emergency stop for the machine. The reason for our selection is that its dual-axis integration saves cabinet width; it has built-in safety functions, eliminating the need for additional safety relays and directly meeting the CE safety inspection requirements for the machine; the DRIVE-CLiQ microsecond-level synchronization ensures higher surface finish of the machining.

2. Equipped with D410-2 DP (6AU1410-2AA00-0AA0), featuring dual-axis electronic gear synchronization for the spindle and the lead wire; it can incorporate a safety brake SBT, automatically stopping the machine in case of wire breakage or overspeed to protect the fabric from being pulled and damaged. The Siemens S120 dual-axis servo module has a single-axis output of 18A and integrates a complete set of SIL2-level safety functions. The dual-axis integrated design saves cabinet space, and its microsecond-level inter-axis synchronization performance is suitable for various precision automation equipment such as CNC machines, printing and packaging, winding lithium batteries, and gantry mechanical hands. It can be perfectly matched with the SIMOTION D410 motion controller for use as a complete set.

Daily Maintenance

Environment and cleaning: regularly use dry compressed air (pressure ≤ 0.4 MPa) to clean the module surface and ventilation slots to prevent overheating from dust accumulation.

Temperature and ventilation: ensure the ambient operating temperature remains between 0 °C and 40 °C, and periodically check that the cooling fan is running properly.

Electrical connections: periodically inspect power and motor cable terminals for looseness or oxidation, and verify the DC bus voltage is normal (approx. 537 V DC).

Spare parts replacement: pay attention to capacitor service life and plan spare parts replacement in advance based on operating hours to avoid unexpected downtime.

Why choose us?

We recommend the Siemens 6SL3120-2TE21-8AC0 model, with C-size featuring built-in air cooling. Each axis has a rated output of 18A. One module drives two servos, significantly saving installation space for the control cabinet, simplifying the wiring of the DC bus, and reducing system EMC interference. The module comes with complete SIL2 safety expansion functions and integrates safety processes such as STO/SS1/SLS, eliminating the need for external safety circuit hardware costs and meeting the mechanical safety standards for machine tools and automation equipment. It achieves micron-level dual-axis synchronous control through the DRIVE-CLiQ real-time bus, is compatible with synchronous servos and spindle motors, and perfectly matches CU320-2 and SIMOTION D motion controllers. It is compatible with the TIA fully integrated automation platform. The German original hardware has strong stability and complete fault diagnosis; we in Yueyang Tongtu provide brand-new original genuine products, along with a complete set of selection, wiring diagrams, parameter templates and on-site debugging.