Siemens SINAMICS G120C 2.2kW Compact Frequency Inverter

Technical Overview

3-phase 380-480V compact frequency inverter with 2.2kW (LO)/1.5kW (HO) output, integrated Safe Torque Off, PROFINET/EtherNet/IP, and IP20 protection.

Key Features

Compact and versatile design with optimum functionality.
Integrated, certified Safe Torque Off (STO) safety function.
Simple and quick operation/commissioning via PC (USB) or operator panel.
Networkable via standard fieldbus systems: PROFINET-PN and EtherNet/IP.
Card slot for cloning parameter sets for intuitive series commissioning.
Precise SLVC vector control and automatic flux reduction for energy efficiency.
Suitable for applications like conveyor belts, mixers, pumps, fans, and compressors.
Comprehensive I/O interface: 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output, 1 motor temperature sensor input.
IP20 / UL Open Type protection.

Technical Specification Matrix

Parameter	Value
Input Line Voltage	3 AC 380-480 V (+10% / -20%)
Line Frequency	47-63 Hz
Rated Power (Low Overload)	2.20 kW (3.00 hp)
Rated Power (High Overload)	1.50 kW (2.00 hp)
Rated Current (Low Overload)	7.40 A
Rated Current (High Overload)	6.00 A
Degree of Protection	IP20 / UL Open Type
Communication Interface	PROFINET, EtherNet/IP
Standard Digital Inputs	6
Fail-Safe Digital Inputs	1
Digital Outputs (Relay Changeover Contact)	1 (DC 30 V, 0.5 A)
Digital Outputs (Transistor)	1 (DC 30 V, 0.5 A)
Analog / Digital Inputs	1 (Differential input, 10 bit resolution)
Analog Outputs	1 (Non-isolated output)
Motor Temperature Sensor Input	1 (PTC, KTY, Thermo-Click compatible)
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Efficiency	0.97
Power Loss	73.4 W
Ambient Temperature (Operation)	-10 to 40 °C
Physical Weight (kg)	1.2
Dimensions L x W x H (cm)	22.5 x 27 x 8.5

Industrial Applications

1. Conveyor Belt Systems with Enhanced Safety

This drive is ideal for controlling motors in medium-sized conveyor belt systems. Its 2.2kW (LO) power output and 380-480V 3AC input precisely match typical conveyor motor requirements. The integrated Safe Torque Off (STO) function ensures critical safety, immediately preventing accidental restarts during emergency stops or maintenance procedures, thus protecting personnel and equipment. PROFINET/EtherNet/IP communication facilitates seamless integration into factory automation networks for centralized control and diagnostics.

Problem Solved

Ensures safe operation and quick, controlled stops in conveyor systems, crucial for worker safety and preventing product damage, while integrating into modern automation architectures.

Conveyor ControlMotor Speed ControlSafe Torque Off (STO)PROFINETEtherNet/IPIndustrial Safety3-Phase Motor

2. Energy-Efficient Pump and Fan Control

The SINAMICS G120C can effectively regulate the speed of pumps and fans in HVAC systems, water treatment plants, or industrial cooling units. Its ability to operate with 380-480V 3AC input and provide 2.2kW (LO) output power, combined with V/f and sensorless vector control techniques, allows for precise flow/pressure regulation, leading to significant energy savings. The IP20 rating is suitable for installation within protective control cabinets in dry, non-hazardous indoor environments common to these applications. Analog inputs enable feedback-based control from pressure or flow sensors.

Problem Solved

Optimizes energy consumption and provides precise control for pumps and fans by matching motor speed to demand, enhancing system efficiency and reducing operational costs.

Pump ControlFan ControlHVACWater TreatmentEnergy OptimizationVariable Frequency Drive (VFD)Sensorless Vector ControlAnalog Input Control

3. Industrial Mixer Applications with Motor Protection

For industrial mixers, which often encounter fluctuating loads and require robust motor control, this drive's 2.2kW (LO) / 1.5kW (HO) output and comprehensive overload capabilities (e.g., 200% for 3s for HO) are highly beneficial. The integrated motor temperature sensor input (compatible with PTC/KTY) offers vital protection by monitoring the motor's thermal state. This prevents overheating and extends motor lifespan, particularly when mixing viscous materials or during extended high-torque operations, ensuring continuous and reliable process performance.

Problem Solved

Provides robust motor control and critical thermal protection for industrial mixers, safeguarding the motor against overload damage and ensuring reliable operation during varying load conditions.

Mixer ControlOverload ProtectionMotor Temperature MonitoringProcess ControlVariable Speed DriveIndustrial AutomationPTC/KTY Interface