SIEMENS SINAMICS S120 CHASSIS

Siemens SINAMICS S120 Chassis

High-Power Modular Drive System for Demanding Industrial Applications

We Tech Power Solutions Ltd supplies Siemens SINAMICS S120 Chassis drive systems for high-power industrial machinery, multi-drive applications, production plants and demanding motion-control systems across Ahmedabad, Gujarat, India and international markets.

The SINAMICS S120 Chassis is a modular high-performance drive format designed for applications requiring high power, flexible drive configuration and precise motor control. The S120 platform supports vector, servo and V/f control, while the Chassis format provides a scalable solution for higher-power industrial installations.

Depending on the selected configuration, Siemens offers S120 Chassis solutions with different Line Modules, Motor Modules, braking components and cooling arrangements. Current Siemens documentation includes both air-cooled and liquid-cooled Chassis units, with high-power configurations extending into the MW range.

For accurate selection and quotation, provide the complete Siemens MLFB/order number, motor information, supply voltage, power requirement, load profile, cooling requirement and application details.

What is Siemens SINAMICS S120 Chassis?

SINAMICS S120 Chassis is a high-power construction format within the SINAMICS S120 modular drive family.

It is designed for industrial applications where standard compact drive formats are not sufficient for the required power, current, thermal performance or system architecture.

The Chassis format can be configured with components such as:

• Line Modules

• Motor Modules

• Active Line Modules

• Smart Line Modules

• Basic Line Modules

• Central Braking Modules

• Control Units

• Sensor Modules

• DRIVE-CLiQ components

This modular architecture allows the drive system to be configured around the machine's power requirements, number of motors, regeneration requirements and control strategy.

Why Choose SINAMICS S120 Chassis?

High-Power Drive Architecture

S120 Chassis is designed for demanding industrial drive applications where high power and reliable continuous operation are essential.

Modular Configuration

Line and Motor Modules can be selected according to the required power, current, number of drives and application architecture.

Flexible Control

SINAMICS S120 supports vector, servo and V/f control, allowing the platform to address different machine and process requirements.

High-Power Line Supply

Different Line Module technologies can be selected depending on whether the application requires basic, intelligent or regenerative line operation.

Regenerative Operation

Active Line Modules can support regenerative operation, allowing braking energy to be returned to the electrical supply when the system is appropriately configured.

Air- & Liquid-Cooled Versions

Siemens offers Chassis solutions with different cooling technologies for varying power-density and installation requirements. Current Siemens documentation includes liquid-cooled Chassis units extending into very high power ranges.

DRIVE-CLiQ Connectivity

DRIVE-CLiQ provides digital communication between compatible drive components, motors, encoders and system devices.

Safety Integrated

Depending on the configuration, SINAMICS S120 supports integrated safety functions for machine-safety applications.

Engineering & Diagnostics

S120 can be engineered and commissioned using Siemens engineering environments, including integration with TIA Portal and SINAMICS Startdrive for supported configurations.

SINAMICS S120 Chassis System Architecture

A typical S120 Chassis system can be built around several major components.

Line Module

The Line Module converts the incoming electrical supply into the required DC-link power for the drive system.

Depending on the application, Siemens provides:

• Basic Line Modules

• Smart Line Modules

• Active Line Modules

Motor Module

Motor Modules provide the controlled power output to the connected motors.

Multiple Motor Modules can be integrated into larger drive architectures depending on the required number of axes and system configuration.

Control Unit

The Control Unit manages drive functions and coordinates communication between the drive components and automation system.

Sensor Module

Sensor Modules can provide additional encoder interfaces and feedback functionality according to the selected architecture.

Central Braking Module

Used where braking energy must be dissipated through a braking system rather than returned to the supply.

DRIVE-CLiQ

DRIVE-CLiQ enables digital communication between compatible components and supports simplified system diagnostics and commissioning.

Key Features of Siemens SINAMICS S120 Chassis

• High-power modular drive architecture

• Chassis construction format

• Suitable for demanding industrial applications

• Single- and multi-drive configurations

• Vector control

• Servo control

• V/f control

• Basic, Smart and Active Line Module options

• Motor Module configuration

• Regenerative drive options

• Common DC-link architecture

• DRIVE-CLiQ communication

• Air-cooled configurations

• Liquid-cooled configurations

• Safety Integrated functions

• Engineering and diagnostic capabilities

• High-power industrial operation

• Scalable system configuration

Technical Overview

Specification SINAMICS S120 Chassis

Brand Siemens

Product Family SINAMICS S120

Construction Format Chassis

Product Type High-performance modular drive system

Applications High-power single- and multi-drive systems

Control Modes Servo / Vector / V/f, configuration dependent

Line Modules Basic / Smart / Active

Motor Modules Available according to system configuration

Cooling Air-cooled / Liquid-cooled

DC-Link Common DC-link architecture

Communication DRIVE-CLiQ and applicable system interfaces

Safety Safety Integrated, configuration dependent

Engineering SINAMICS Startdrive / Siemens engineering tools

Installation Industrial control cabinet / drive system

Power Range Configuration and module dependent

Selection Based on complete MLFB, motor, load and application

Important: SINAMICS S120 Chassis is a configurable product family, not a single fixed-rated drive. Exact voltage, rated current, power, overload capability, cooling, dimensions and interfaces depend on the selected Siemens order number.

For example, Siemens' current D21.3 documentation lists liquid-cooled 500–690 V 3 AC Active Line Modules with rated-power configurations extending from hundreds of kW into the MW range.

Air-Cooled vs Liquid-Cooled SINAMICS S120 Chassis

Feature Air-Cooled Chassis Liquid-Cooled Chassis

Cooling Method Forced air Liquid

Main Advantage Conventional industrial installation High power density

Installation Standard industrial environments Space- or thermal-constrained applications

Power Capability High power Very high power configurations available

Thermal Management Air circulation Liquid cooling circuit

Typical Use Heavy machinery and industrial plants High-power / compact installations

The correct cooling technology should be selected based on power, cabinet environment, available installation space, ambient conditions and plant cooling infrastructure.

Typical Applications

SINAMICS S120 Chassis is suited to industrial machines and processes where high-performance motor control and substantial power capacity are required.

Rolling Mills

For coordinated motor control in metal-processing and rolling applications.

Paper & Pulp Machinery

Suitable for large production machines requiring multiple high-power motor drives.

Material Handling

For high-power conveyors, hoisting equipment and large material-handling systems.

Test Stands

Suitable for demanding test and dynamometer applications requiring precise speed and torque control.

Hoisting Systems

Supports controlled acceleration, braking and positioning in high-power lifting applications.

Marine & Offshore

Liquid-cooled configurations can be considered for applications where high power density and restricted installation space are important.

Production Lines

Suitable for large industrial production systems requiring multiple coordinated drives.

Heavy Machinery

For industrial machines requiring high-power motor control, dynamic performance and scalable drive architecture.

Industries

• Steel & Metals

• Paper & Pulp

• Mining

• Cement

• Marine & Offshore

• Material Handling

• Heavy Machinery

• Industrial Processing

• Manufacturing

• Production Automation

• Hoisting & Cranes

• Test & Research Facilities

• Large Industrial Plants

SINAMICS S120 Chassis vs S120 Booksize

Both are part of the SINAMICS S120 family, but their physical formats and application focus are different.

Feature S120 Chassis S120 Booksize

Main Positioning High-power applications Compact multi-axis applications

Construction Chassis Booksize

Power Scale High / very high power Compact machine-level systems

Installation High-power cabinet installation Compact control cabinet

Cooling Air / liquid options Primarily air-cooled

Application Heavy machinery / industrial plants OEM and multi-axis machines

Typical Industries Steel, paper, mining, marine Packaging, machine tools, robotics

System Architecture Modular high-power Compact modular

The S120 platform itself is modular and scalable, while the construction format should be selected according to power, installation, thermal and application requirements.

SINAMICS S120 Chassis vs S120 Cabinet Modules

The two formats serve related high-power applications but have different implementation approaches.

S120 Chassis

• Individual high-power drive modules

• Flexible cabinet engineering

• Suitable for custom drive-system configurations

• Air- and liquid-cooled options

• Useful where the panel builder/OEM requires greater cabinet design flexibility

S120 Cabinet Modules

• Preconfigured cabinet-based transport units

• Standardized interfaces

• Central supply and common DC-bus architecture

• Faster installation and system integration

• Suitable for high-power multi-motor systems

Siemens describes Cabinet Modules as preconfigured transport units with standardized interfaces, while the Chassis format provides individual high-power drive modules for system integration.

SINAMICS S120 Chassis vs Chassis-2

Siemens also offers the newer SINAMICS S120 Chassis-2 generation.

Chassis and Chassis-2 should not automatically be treated as interchangeable replacements. The exact generation, electrical characteristics, mechanical dimensions, cooling arrangement, firmware/software compatibility and system architecture must be verified before replacement.

Siemens positions Chassis-2 as a modular high-power drive architecture with improved cooling, reduced derating and digital condition-monitoring capabilities.

For replacement or retrofit applications, always provide the complete existing Siemens MLFB before selecting a successor.

How to Select the Correct SINAMICS S120 Chassis

1. Identify the Application

Define whether the drive is required for:

• Rolling mills

• Paper machines

• Conveyors

• Hoisting

• Test stands

• Marine/offshore

• Heavy machinery

• Production lines

2. Determine Motor Requirements

Collect:

• Motor model

• Rated power

• Rated current

• Rated voltage

• Rated speed

• Encoder type

• Peak torque

• Duty cycle

3. Determine Total Drive Power

For multi-drive systems, calculate the total motor power and simultaneous operating requirements.

4. Select the Line Module

Determine whether the application requires:

• Basic Line Module

• Smart Line Module

• Active Line Module

Regenerative applications generally require an appropriate regenerative line architecture.

5. Select Motor Modules

Motor Modules should be matched to the motor current, peak load, overload requirement and control mode.

6. Select Cooling

Choose air or liquid cooling based on:

• Total power

• Cabinet environment

• Ambient temperature

• Available space

• Heat dissipation

• Plant infrastructure

7. Determine Braking Requirements

Evaluate whether braking energy should be dissipated or returned to the electrical supply.

8. Check Control & Communication

Confirm the controller, network, DRIVE-CLiQ topology and feedback architecture.

9. Verify Safety

Determine the required Safety Integrated functions according to the machine risk assessment.

10. Confirm Complete MLFB

The complete Siemens MLFB/order number should be checked before purchase or replacement.

Siemens SINAMICS S120 Chassis Supplier in Ahmedabad, Gujarat & India

We Tech Power Solutions Ltd provides Siemens industrial automation and drive sourcing support from Ahmedabad, Gujarat for customers across India.

We can assist with:

• SINAMICS S120 Chassis identification

• MLFB verification

• Line Module selection

• Motor Module selection

• Power and current matching

• Cooling selection

• Replacement drive identification

• Retrofit requirements

• Technical comparison

• Commercial quotation support

• OEM and industrial project sourcing

For an existing installation, send the complete Siemens order number, nameplate photograph, module photograph and motor details for accurate product identification.

Siemens SINAMICS S120 Chassis Supplier for UAE & Gulf

We support industrial automation sourcing requirements across:

• UAE

• Dubai

• Abu Dhabi

• Saudi Arabia

• Qatar

• Oman

• Kuwait

• Bahrain

For high-power applications, sharing the complete electrical and mechanical requirements before quotation helps ensure the correct Chassis configuration is selected.

Why Choose We Tech Power Solutions Ltd?

• Siemens drive sourcing support

• High-power automation product expertise

• Ahmedabad-based technical assistance

• MLFB/order-number verification

• Application-based drive selection

• Motor-drive compatibility support

• Replacement and retrofit assistance

• OEM project support

• India-wide sourcing

• Gulf-region sourcing support

Frequently Asked Questions

What is Siemens SINAMICS S120 Chassis?

SINAMICS S120 Chassis is a high-power construction format within the modular SINAMICS S120 drive family, designed for demanding industrial applications requiring scalable drive power and flexible system configuration.

What applications use SINAMICS S120 Chassis?

Typical applications include rolling mills, paper machines, hoisting equipment, material handling, test stands, heavy machinery and other high-power industrial systems.

Is SINAMICS S120 Chassis suitable for multi-motor systems?

Yes. SINAMICS S120 is a modular drive platform that can be configured for multi-drive applications using Line Modules, Motor Modules and a common DC-link architecture.

What cooling options are available?

Depending on the selected configuration, S120 Chassis is available with air-cooled and liquid-cooled solutions. Siemens' current documentation includes liquid-cooled Chassis units for high-power applications.

What is the difference between S120 Chassis and S120 Cabinet Modules?

S120 Chassis generally provides individual high-power drive modules for flexible cabinet engineering, while Cabinet Modules are preconfigured cabinet-based transport units designed to simplify installation and integration.

Is S120 Chassis the same as Chassis-2?

No. Chassis-2 is a newer generation and should not be assumed to be a direct drop-in replacement. Compatibility must be checked using the complete MLFB, electrical data, mechanical dimensions and system architecture. Siemens highlights improved cooling, reduced derating and digital-readiness features on Chassis-2.

Can We Tech Power Solutions Ltd help with S120 Chassis replacement?

Yes. Share the existing Siemens MLFB/order number, cabinet or module photograph, motor details and application. We can assist with product identification, replacement assessment and quotation support.

Need Siemens SINAMICS S120 Chassis Pricing or Replacement Support?

Looking for a Siemens SINAMICS S120 Chassis drive for a new industrial project, replacement or retrofit?

Share your Siemens MLFB/order number, motor details, supply voltage, power requirement, application and quantity with We Tech Power Solutions Ltd for product identification and quotation support.