SINAMICS S120 – Line Modules and Power Line Units

SINAMICS S120 Line Modules represent the core of energy management in Siemens advanced drive systems.
Within the S120 architecture, these modules are responsible for supplying the DC link, managing energy regeneration, and ensuring electrical stability, safety, and operational continuity even in the most complex industrial applications.

The SINAMICS S120 – Line Modules / Power Line Units family is designed for multi-axis, motion control, and CNC applications, typical of SINUMERIK environments and advanced automation.

SINAMICS G120 – Power Modules and Control Units: Complete Technical Guide

The SINAMICS G120 family is one of Siemens’ most versatile and widely adopted solutions for industrial automation. Designed for general-purpose drive applications, the G120 combines power, modularity, energy efficiency, and seamless integration with Siemens control systems (SIMATIC, SINUMERIK, SIMOTION).

Modules belonging to the 6SL32xx root include Control Units, Power Modules, and Option Modules used across the G120, G120C, and G120X series, covering a wide range of needs—from industrial ventilation to pumps, conveyors, and process machinery.

SINAMICS S120 – Control Modules (Control Units / CU): the complete technical guide

The SINAMICS S120 system represents one of the most advanced Siemens drive architectures for complex motion-control applications. Used in machine tools, high-performance automation lines, packaging, extrusion, and multi-axis applications, the S120 stands out for its modularity, scalability, and seamless integration with SINUMERIK, SIMOTION, and Siemens PLCs.

Within the platform, the Control Modules (Control Units, CU) serve as the “brain” of the system: they manage drive logic, communication between modules, axis coordination, integrated safety, and the interface with PLCs and fieldbus networks.

Siemens Power Modules 6RB2000, 6RB2012 and 6RB2025

The Siemens 6RB2000, 6RB2012 and 6RB2025 modules belong to the SIMODRIVE family, specifically to the historical 6RB series, one of the first generations of Siemens industrial power supplies for drive systems. Although they predate the more well-known SIMODRIVE 611 platform, these modules remain essential in many legacy plants thanks to their reliability, robustness and ability to stabilize the DC bus.

They are widely used in applications where production continuity is a critical requirement and where a full plant revamping would involve high costs or extended downtime.