Conveyor & Material Handling
Conveyor motors are commonly speed-controlled by VFDs for smooth acceleration, controlled deceleration and PLC-based sequencing.
Siemens SINAMICS G120C VFD: Product Overview
The Siemens SINAMICS G120C is a compact frequency converter designed for a wide range of industrial motor-control applications. Siemens positions G120C as a compact and versatile drive family combining integrated safety, energy-efficient sensorless vector control and industrial communication options.
The G120C family covers 0.55 kW to 132 kW across seven frame sizes. Depending on the selected variant, communication can include PROFINET, EtherNet/IP, PROFIBUS or USS/Modbus RTU.
In simple terms:
Siemens SINAMICS G120C is a compact industrial VFD for controlling AC motors. It offers 0.55 kW to 132 kW, integrated Safe Torque Off (STO), sensorless vector control, fieldbus communication and TIA Portal integration, depending on the selected variant.
How G120C Controls a Motor
The drive converts fixed AC supply into variable voltage and frequency so motor speed and torque match process demand.
01 Select
→
02 Connect
→
03 Commission
→
04 Monitor
Compact DriveCombines converter functions in a space-saving package, up to 132 kW.
Integrated STOSafe Torque Off is built in for suitable machine safety architectures.
CommunicationPROFINET, EtherNet/IP, PROFIBUS or USS/Modbus RTU depending on variant.
Where Is G120C Used?
Typical applications include conveyors, pumps, fans, compressors, mixers, packaging machines, material handling and OEM machine building. The right variant depends on the motor, load duty and communication architecture.
Industrial Process Reference
Pumps & Utilities
Pump speed can follow process demand instead of running at full speed continuously.
Reference photographs are illustrative free-to-use Pexels images and do not claim that the photographed equipment uses SINAMICS G120C.
What Is Siemens SINAMICS G120C VFD?
A VFD (Variable Frequency Drive) controls motor speed and torque by regulating the electrical supply delivered to the motor. SINAMICS G120C is Siemens' compact converter platform for industrial applications where space, integration and drive functionality are important.
Unlike the modular SINAMICS G120, G120C combines the required converter functions into one compact package, without the separate control-unit / power-module arrangement.
Machine DrivesConveyors, mixers, packaging and production machines.
Fans & HVACAdjustable airflow and ventilation control.
Pumps & UtilitiesVariable-speed pumping for process and utility systems.
Power Range & Technical Specifications
Siemens states that SINAMICS G120C covers 0.55 kW to 132 kW in seven frame sizes. Exact ratings, overload performance, filtering and communication interface depend on the selected MLFB.
Drive typeCompact frequency converter / VFD
Power range0.55 kW to 132 kW
Frame sizesSeven frame sizes
ControlSensorless vector control and other modes depending on configuration
SafetyIntegrated Safe Torque Off (STO)
CommunicationPROFINET, EtherNet/IP, PROFIBUS, USS/Modbus RTU depending on variant
EngineeringTIA Portal / SINAMICS Startdrive integration
ProtectionIP20 / UL Open Type for applicable variants
Important:
Do not select a G120C only from the kW value. Check the complete MLFB, supply voltage, motor current, overload duty, filter, communication interface and frame size before ordering.
Key Features of SINAMICS G120C
Compact DesignDrive functionality in a compact package for space-conscious installations.
Safe Torque OffIntegrated STO reduces the need for extra external switching for the STO function itself.
Sensorless Vector ControlHigh torque at low-frequency setpoints for demanding standard applications.
Industrial CommunicationPROFINET, EtherNet/IP, PROFIBUS and USS/Modbus RTU depending on variant.
TIA Portal IntegrationConfiguration, commissioning and diagnostics with SINAMICS Startdrive where applicable.
Commissioning OptionsBOP-2, IOP-2, Smart Access and SD-card functions depending on accessories.
Multiple Frame SizesSeven frame sizes match the rating and installation requirement.
Energy-Efficient OperationMotor speed can follow process demand for applicable applications.
G120C Communication: PROFINET, EtherNet/IP, PROFIBUS & Modbus
Siemens offers different G120C variants with different integrated fieldbus interfaces, so the communication requirement should be defined before the complete MLFB is selected.
PROFINETEthernet-based communication with Siemens controllers; documented versions have two RJ45 connectors.
EtherNet/IPSelected versions integrate with compatible industrial controllers; verify the exact profile from the MLFB.
PROFIBUSFor applications using established PROFIBUS DP networks, with PROFIdrive for applicable variants.
USS / Modbus RTURS485-based serial communication for compatible applications.
G120C Communication Architecture
Use the communication interface defined by the complete MLFB and the connected automation system.
For a complete PLC-HMI-VFD architecture, see our Siemens PLC, HMI, VFD and industrial automation products.
Drive & Operator Control in a Real Factory
Operator Panel & Machine Control
In a practical installation the drive receives speed commands from a PLC or panel and returns status, alarms and diagnostics. The exact protocol depends on the selected G120C variant.
TIA Portal & SINAMICS Startdrive Integration
G120C can be integrated into the Siemens TIA Portal engineering environment, including system diagnostics and reusable drive configuration concepts.
Drive ConfigurationConfigure hardware, communication interface and operating parameters.
CommissioningSet up, test and adjust parameters with supported tools and panels.
DiagnosticsBring drive diagnostics into the automation workflow to identify faults.
Drive ReuseReuse compatible drive configurations, parameters and components.
Engineering & Commissioning Flow
Typical flow: configure the drive, transfer parameters, monitor diagnostics and run the connected motor.
Engineering note:
Match the TIA Portal / Startdrive version with the selected G120C firmware and hardware revision. Software support can vary by product generation.
SINAMICS G120C Industrial Applications
G120C is intended for diverse standard industrial drive applications. The final rating and control mode should come from the motor nameplate, load profile and application duty.
Conveyor & Material HandlingSpeed control for conveyors, transfer systems and sorting equipment.
Pumps & Water SystemsVariable-speed control for process pumps, booster systems and utility skids.
Fans & HVACSupply, exhaust and air-handling fan speed control.
Packaging MachinesAdjustable motor speed with PLC / HMI communication.
Compressors & Process EquipmentSelected standard-duty applications after correct duty selection.
OEM & Machine BuildingCompact drive integration for machine builders using Siemens automation.
Pump & Utility Control
Drive speed follows flow or pressure demand, with start/stop ramps that reduce mechanical stress.
Packaging Process
Conveyor and handling motors run at adjustable speeds, coordinated by PLC logic.
Material Handling
Controlled acceleration and deceleration support repeatable product movement.
Photographs illustrate representative industrial environments. The exact drive, motor and communication architecture depends on the machine design.
Siemens G120C vs V20 vs G120
These SINAMICS families serve different requirements. This is a selection guide, not a substitute for detailed motor, load and system engineering.
SINAMICS V20
- Compact drive for basic applications
- Simple motion sequences and basic machines
- Communication depends on version / accessories
SINAMICS G120C
- Compact industrial frequency converter, 0.55–132 kW
- Integrated STO
- PROFINET, EtherNet/IP, PROFIBUS or USS/Modbus RTU depending on variant
SINAMICS G120
- Modular frequency converter platform
- Separate control and power components
- Suited to applications needing broader drive-system flexibility
Selection point:
Choose G120C when the project needs a compact Siemens drive with integrated safety and industrial communication options. Confirm the family only after checking motor duty, power, communication and safety requirements.
How to Select the Right G120C VFD
Selection starts with the motor nameplate and load profile, not only the motor kW.
01Motor
Rated kW and motor current.
02Supply
Voltage, phase and frequency must match the variant.
03Load Duty
Normal or heavy duty and overload profile.
04Communication
PROFINET, EtherNet/IP, PROFIBUS or USS/Modbus RTU.
05Safety
STO and the machine safety architecture.
06Environment
Panel, ambient temperature and protection requirements.
07Accessories
BOP-2, IOP-2, Smart Access, braking and other options.
Selection Rule:
Verify the complete Siemens MLFB before purchase. Two G120C drives with similar power can differ in communication, filtering, voltage or configuration.
G120C VFD Buying & Engineering Checklist
- Motor rated power and current
- Supply voltage and phase
- Normal or heavy-duty application
- Required speed and frequency range
- Required communication protocol
- STO / safety requirement
- Filter and EMC requirement
- Braking requirement where applicable
- Installation and environmental conditions
- Complete Siemens MLFB confirmation
For selection, availability and quotation, share your motor and application requirement with Swasty Prasad Automation.
Need Siemens SINAMICS G120C VFD?
Share your motor rating, supply voltage, communication requirement, application and MLFB preference to request a current quotation.
View G120C Product WhatsApp InquiryRelated Siemens Automation Resources
SINAMICS G120C ProductView product information
Official Siemens G120CSiemens product page
Siemens ProductsExplore product range
Frequently Asked Questions
What is Siemens SINAMICS G120C VFD?
A compact frequency converter for diverse industrial drive applications, with integrated Safe Torque Off, sensorless vector control and several communication options depending on the variant.
What is the power range of Siemens G120C?
0.55 kW to 132 kW across seven frame sizes. Exact rating, voltage, overload capability and frame size depend on the order variant.
Does G120C support PROFINET?
Yes. Siemens offers G120C variants with integrated PROFINET. Other variants are available for EtherNet/IP, PROFIBUS or USS/Modbus RTU.
Does Siemens G120C have Safe Torque Off?
Yes. STO is an integrated safety function. The complete safety architecture must still be designed and validated for the machine.
Can G120C be integrated with TIA Portal?
Yes. Siemens provides TIA Portal integration, including engineering and diagnostics workflows with SINAMICS Startdrive where supported by the software and drive version.
What control method does SINAMICS G120C use?
Energy-efficient sensorless vector control and other drive control functions. Select the mode according to the motor, load and application.
What applications use Siemens G120C?
Conveyors, pumps, fans, compressors, mixers, packaging equipment, material handling and machine-building applications.
What communication protocols are available?
Depending on the variant: PROFINET, EtherNet/IP, PROFIBUS and USS/Modbus RTU. Confirm the interface from the complete MLFB.
What is the difference between G120 and G120C?
G120 is a modular platform with separate control and power components; G120C is a compact converter that combines the required functions in a space-saving package.
What should be checked before ordering a G120C?
Complete MLFB, motor power and current, supply voltage, overload duty, frame size, filter, braking, communication protocol, enclosure requirements and required I/O.
Where can I buy Siemens G120C VFD in India?
Contact Swasty Prasad Automation with the motor rating, supply details, communication requirement and quantity.
Technical reference: Information in this guide is based on Siemens G120C product information and technical documentation. For engineering, commissioning and purchasing, verify the latest Siemens documentation and the exact MLFB.
Power rating, voltage, overload capability, communication interface, filtering, frame size, firmware support and article numbers can vary by variant or revision.
Conclusion
The Siemens SINAMICS G120C is a compact industrial VFD family covering 0.55 kW to 132 kW. Integrated STO, sensorless vector control, industrial communication options and TIA Portal integration make it suitable for many standard motor-control and machine-automation applications.
For correct selection, verify motor power and current, supply voltage, load duty, communication protocol, safety requirements, environment and the complete Siemens MLFB. For a conveyor, pump, fan, packaging machine or OEM project, share the details with Swasty Prasad Automation.