Siemens 6SL3120-2TE21-8AA3 SINAMICS S120 Double Motor Module

Introduction to SINAMICS S120 Drive Systems

The Siemens 6SL3120-2TE21-8AA3 is an integral component of the SINAMICS S120 modular drive system. As a Double Motor Module, it is designed to control two independent motors simultaneously, optimizing cabinet space and reducing hardware costs. This unit is specifically engineered for high-performance motion control applications where precision, speed, and torque accuracy are paramount.

Technical Performance and Ratings

The 6SL3120-2TE21-8AA3 operates on a DC link voltage and provides a regulated output to the connected motors. Its specifications include:

• Input: 600V DC link.

• Output Current: 2 x 18A continuous rating.

• Cooling: Internal air cooling with integrated fans.

• Interface: DRIVE-CLiQ technology for digital communication with the Control Unit.

DRIVE-CLiQ Communication Technology

One of the standout features of this Motor Module is its use of DRIVE-CLiQ. This high-performance serial interface connects the various components of the SINAMICS S120 system, including the Control Unit, Motor Modules, and encoders. It allows for automatic identification of components and high-speed synchronization, which is essential for multi-axis coordinated movement in robotics and CNC machining.

Energy Efficiency and DC Link Sharing

The SINAMICS S120 architecture allows multiple Motor Modules to share a common DC link. This means that energy generated by a motor in regenerative (braking) mode can be used by another motor in the same system that is currently motoring. The 6SL3120-2TE21-8AA3 leverages this efficiency to reduce overall power consumption and heat dissipation within the control cabinet.

Safety Integrated Functions

Safety is a core priority for the 6SL3120-2TE21-8AA3. The module supports Siemens Safety Integrated functions, such as Safe Torque Off (STO), Safe Stop 1 (SS1), and Safe Brake Control (SBC). these features are integrated into the drive electronics, allowing for rapid response to safety events without the need for extensive external safety circuitry.

Installation and Connectivity

The module is designed for booksize format installation, allowing for a compact side-by-side arrangement. It features robust power terminals and easy-to-access DRIVE-CLiQ ports. Proper installation requires adherence to Siemens' guidelines regarding cable lengths and shielding to ensure signal integrity and compliance with electromagnetic compatibility standards.