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What Is a SIMODRIVE Control Board and What Is It Used For?
Within Siemens SIMODRIVE 611 industrial automation systems, the Control and Regulation Boards are the electronic components that extend, specialize, and optimize the functions of the Closed-Loop modules.
They are the system’s “additional intelligence”: they handle advanced logic, synchronization, communication, and dedicated functions that are not managed by the power modules or the Closed-Loop modules.
In practice, the Control Boards are what allow a CNC system to become: more precise, more versatile, faster, and more integrated with the machine.
What is a Siemens Simodrive Power Module and what is it used for?
In every industrial automation system, the power module is the component that supplies the motor with the energy it needs to move.
It is the element that converts the voltage coming from the Power Supply into controlled current, regulating:
torque, speed, direction, and acceleration, without any loss of precision or stability.
In practice, the Power Module is the “electric muscle” of the drive system:
it receives impulses from the control module (Closed-Loop Unit) and converts them into physical power delivered to the motor.
Siemens SIMODRIVE 6SN1115 – Guide to the Range of Control and Drive Modules
The Siemens SIMODRIVE 6SN1115 range is one of the most widely used standards within SINUMERIK CNC automation systems and industrial applications requiring high precision, reliability, and production continuity. These modules are essential for axis and spindle control, used in machine tools, production lines, and highly automated industrial systems.
These devices remain extensively present across the European machine park, even though many versions are now discontinued. Access to certified repair and refurbishment services therefore becomes strategic to ensure the lifecycle of industrial plants and reduce downtime costs.
Siemens SIMODRIVE 611 – 6SN1117 Control Modules: The Heart of CNC Precision
The Siemens SIMODRIVE 611 6SN1117 modules are among the most reliable and long-lasting components in CNC automation systems. Designed to manage axes and spindles with extremely high precision, they are still used in thousands of machine tools thanks to their robustness, operational continuity, and full compatibility with the SINUMERIK ecosystem.
Despite their commercial discontinuation, the 6SN1117 modules remain essential in modern manufacturing—especially in environments where stability, accuracy, and process consistency are non-negotiable requirements.
The Siemens family 6SN1118-1NK / 6SN1118-1NJ / 6SN1118-0NH includes the special and OEM versions of the control units from the SIMODRIVE 611 range, developed by Siemens for dedicated applications or customized solutions for machine builders (OEM – Original Equipment Manufacturer).
These modules are characterized by specific firmware, adapted interfaces, and customized control logic designed according to the requirements of the machine builder or plant.
On the E-Repair website, the range also includes related models such as 6SN1118-0NJ01-0AA0, 6SN1118-0NK01-0AA0, 6SN1118-0NP01-0AA0 and 6SN1118-0NH01-0AA0, all compatible with SINUMERIK 810D / 840D CNC systems and Siemens OEM digital configurations.
These variants, often considered custom modules, ensure maximum integration within SIMODRIVE 611 systems and maintain full compatibility with the standard versions.
Technical Description 6SN1118-0DA / 6SN1118-0DB / 6SN1118-0DC / 6SN1118-0DF / 6SN1118-0DG
The Siemens 6SN1118 Digital Drive family includes the digital axis control units of the SIMODRIVE 611 range, such as the 6SN1118-0DA, 6SN1118-0DB, 0DC, 6SN1118-0DE, 6SN1118-0DF, and 6SN1118-0DG models, designed for high-performance feed and spindle axis control.
These units represent the digital evolution of the previous Siemens analog boards, ensuring high-speed data transmission, improved control accuracy, and reduced cycle times in the most demanding CNC applications.
Thanks to direct communication with the 6SN1123 and 6SN1145 power modules, the 6SN1118 Digital Drive series guarantees energy efficiency, signal stability, and integrated diagnostics within the SINUMERIK 810D / SINUMERIK 840D systems.
The Siemens 6SN1118 Digital Drive family includes the digital axis control units of the SIMODRIVE 611 range, such as models 6SN1118-0DA, 6SN1118-0DB, 6SN1118-0DC, 6SN1118-0DE, 6SN1118-0DF and 6SN1118-0DG, designed for high-performance control of feed axes and spindle axes.
These units represent the digital evolution of previous Siemens analog control boards, providing high-speed data transmission, greater control accuracy, and reduced cycle times in the most advanced CNC applications.
Thanks to direct communication with the 6SN1123 and 6SN1145 power modules, the 6SN1118 Digital Drive units ensure energy efficiency, signal stability, and integrated diagnostics within SINUMERIK 810D / SINUMERIK 840D systems.
The Siemens 6SN1118-0B series belongs to the SIMODRIVE 611 range, designed for the control of high-performance multi-axis systems.
These are closed-loop control units that use resolver feedback to continuously monitor motor position and speed, ensuring exceptional motion accuracy and dynamic stability.
These modules are compatible with SINUMERIK 810D / SINUMERIK 840D CNC systems and are among the most widely used configurations in Siemens industrial mechatronics, thanks to their reliability and their easy integration into SIMODRIVE 611 modular racks.
💡 What is a control module and what is it used for?
In every industrial automation system, there is a component that coordinates motion: the control module.
This device receives command signals from a logic or numerical controller (PLC / CNC) and converts them into electrical impulses sent to the motors, regulating speed, torque, and position.
Its main task is to keep movement stable, accurate, and synchronized through a closed-loop control system that continuously compares real-time data from position sensors or encoders.
In practice, it is the brain of the drive system: it decides how, how much, and when to move, ensuring efficiency and safety throughout the production process.
Technological innovation has reduced the life cycle of products, which are declared out of production after 3 or 5 years. In the industrial sector, companies that invest in a new production line expect that the repair and recovery service can guarantee its use for at least 10/15 years if not more.
E-Repair, a leading company in the reference sector and the only authorized Siemens service partner in Italy for the repair and regeneration of industrial electronic boards, has developed its core business on the concept of the circular economy.
2022 is a complex year, on the one hand the pandemic has changed the balance of the market, making company management more complex and the dynamics of production planning and the entire value chain in general. On the other hand, the industries and the Italian economy are facing an epochal change due to the transition to Industry 4.0 and digitalisation. While, the slowdown of the supply-chain in the procurement of semiconductors and microchips, in addition to the shortage of raw materials, in conjunction with the war in Ukraine and the exacerbation of relations with Russia which has triggered a dangerous spiral due to the progressive and uncontrolled increase in gas and energy prices in general forces companies to make new investments necessary for the ecological transition.
Siemens MICROMASTER Mid-Power and Cabinet – modular drives for large industrial plants
The MICROMASTER Mid-Power and Cabinet versions represent the high-power range of the MICROMASTER family, designed for centralized installations and large industrial facilities.
Unlike compact inverters installed on individual machines, these systems drive entire production sections or plant utilities.
They are typically installed in power cabinets and modular systems.
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