Siemens SINAMICS G120C 22kW Frequency Converter

Technical Overview

Compact 22kW frequency converter for 380-480V 3AC industrial motor control with integrated STO and PROFINET-PN/EtherNet/IP communication.

Key Features

Rated power: 22.0 kW (Low Overload)
Input voltage: 380-480 V 3AC, 47-63 Hz
Overload capability: 150% for 3s / 110% for 57s (Low Overload); 200% for 3s / 150% for 57s (High Overload) in a 300s cycle
I/O interface: 6 Digital Inputs, 2 Digital Outputs, 1 Analog Input, 1 Analog Output
Integrated Safe Torque Off (STO) function
Integrated fieldbus communication: PROFINET-PN and EtherNet/IP
Degree of protection: IP20/UL open type
Compact and space-saving design
Optimized functionality for various industrial applications
Operation/commissioning via PC (USB) or Basic/Intelligent Operator Panel
Energy-optimized vector control (SLVC) and automatic flux reduction
Part of Siemens Totally Integrated Automation (TIA)

Technical Specification Matrix

Parameter	Value
Rated Power (Low Overload)	22.0 kW
Input Voltage	380-480 V 3AC +10/-20%
Line Frequency	47-63 Hz
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Overload Capability (Low Overload)	150% for 3s, then 110% for 57s in 300s cycle
Overload Capability (High Overload)	200% for 3s, then 150% for 57s in 300s cycle
Digital Inputs (Standard)	6
Digital Outputs (Relay)	1
Digital Outputs (Transistor)	1
Analog Inputs	1 (Differential)
Analog Outputs	1 (Non-isolated)
Safe Torque Off (STO)	Integrated
Fieldbus Communication	PROFINET-PN, EtherNet/IP
Degree of Protection	IP20/UL open type
Power Factor λ	0.90-0.95
Efficiency η	0.98
Sound Pressure Level (1m)	72 dB
Power Loss	696.0 W
Physical Weight (kg)	17
Dimensions L x W x H (cm)	49.5 x 35.6 x 30

Industrial Applications

1. Conveyor Systems with Variable Speed Control

This frequency converter is ideal for controlling the speed of motors in industrial conveyor systems, ensuring precise material flow and optimizing production efficiency. The 22.0 kW power rating handles heavy loads, while the 0-240 Hz/0-550 Hz output frequency range allows for fine-tuned speed adjustments. Integrated STO provides essential safety during maintenance or emergency stops, and PROFINET-PN/EtherNet/IP integration allows for seamless control within automated factory environments.

Problem Solved

Provides precise and safe variable speed control for conveyor motors, improving material handling efficiency and worker safety.

Variable Speed DriveMotor ControlConveyor Belt22kWPROFINETSafe Torque Off

2. Industrial Pumping and Fan Systems

The Siemens SINAMICS G120C can effectively regulate the speed of pumps and fans in industrial settings, leading to significant energy savings and improved process control. Its 380-480V 3AC input voltage is standard for industrial pump motors, and the 22.0 kW output is suitable for medium to large pump and fan applications. The IP20 rating is acceptable for installation within control cabinets, and the analog I/O allows for feedback control based on pressure or flow sensors.

Problem Solved

Optimizes energy consumption and enables precise regulation of fluid or air flow in industrial pumping and ventilation systems.

Pump ControlFan ControlEnergy Efficiency380-480VAnalog InputIP20

3. Mixer and Agitator Applications in Process Industry

With its robust 22.0 kW power output and excellent overload capabilities (150% for 3s), this frequency converter is well-suited for demanding mixer and agitator applications where varying viscosity and load conditions are common. The ability to handle high overload for short durations ensures reliable operation under transient conditions. PROFINET-PN communication allows for easy integration into process control systems, enabling precise mixing recipes and batch control.

Problem Solved

Ensures reliable and precisely controlled mixing processes, even with fluctuating load conditions, and integrates smoothly into process automation.

Mixer ControlAgitatorOverload CapabilityProcess ControlPROFINET22kW