Siemens SINAMICS G120C 75kW Variable Frequency Drive

Technical Overview

75 kW VFD with 380-480V 3AC input, 150% overload, IP20, and integrated PROFINET/EtherNet/IP for precise motor control in industrial automation.

Key Features

Integrated PROFINET and EtherNet/IP communication for seamless system integration.
Safe Torque Off (STO) function for enhanced machinery and personnel safety.
Unfiltered I/O interface: 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output for versatile control.
Compact FSF frame size with IP20 / UL open type protection for control cabinet mounting.
Supports V/f control (0-550 Hz) and sensorless vector control (0-240 Hz) for high dynamic performance.
Forced-air cooling for efficient heat dissipation.

Technical Specification Matrix

Parameter	Value
Rated Output Power (LO)	75.0 kW
Input Voltage	3AC 380-480 V ±10-20%
Line Frequency	47-63 Hz
Rated Input Current (LO)	134.00 A
Rated Output Current (LO)	136.00 A
Rated Input Current (HO)	112.00 A
Rated Output Current (HO)	103.00 A
Max. Output Current	206 A
Output Frequency (V/f control)	0-550 Hz
Output Frequency (Vector control)	0-240 Hz
IP Rating	IP20 / UL open type
Overload Capability (LO)	150% base load current for 3s, then 110% for 57s in 300s cycle
Overload Capability (HO)	200% base load current for 3s, then 150% for 57s in 300s cycle
Communication Protocols	PROFINET, EtherNet/IP
Digital Inputs	6
Digital Outputs	2
Analog Inputs	1
Analog Outputs	1
Safety Function	Safe Torque Off (STO)
Cooling	Forced-air cooling
Ambient Operating Temperature	0 °C to +40 °C (without derating)
Frame Size	FSF
Physical Weight (kg)	59
Dimensions L x W x H (cm)	74.5 x 46.9 x 38.5

Industrial Applications

1. High-Power Conveyor Systems in Manufacturing

This drive is ideal for controlling large conveyor belts in heavy manufacturing or material handling facilities that require precise speed and torque control for moving heavy loads.

Problem Solved

The 75.0 kW rated power and 150% overload capability allow it to handle the high starting torques and dynamic loads of heavy conveyors. The PROFINET/EtherNet/IP integration enables seamless integration into plant-wide automation systems for synchronized operation, while the IP20 rating is suitable for cabinet installation in controlled industrial environments.

75 kW380-480V 3AC150% OverloadPROFINETEtherNet/IPIP20Conveyor SystemsMaterial Handling

2. Industrial Pump and Fan Control in HVAC/Water Treatment

This VFD is well-suited for regulating the speed of large pumps and fans in HVAC systems, water treatment plants, or industrial ventilation, where energy efficiency and precise flow/pressure control are critical.

Problem Solved

Its 75.0 kW power rating is appropriate for driving substantial pumps and fans. The 380-480V 3AC input is standard for industrial power grids. The ability to control output frequency from 0-550 Hz (V/f control) allows for fine-tuning of pump/fan speed, leading to significant energy savings and optimized process control. The IP20 protection is adequate for indoor control rooms.

75 kW380-480V 3AC0-550 HzIP20PumpsFansHVACWater TreatmentEnergy Efficiency

3. Extruder or Mixer Machine Control in Process Industries

This drive can precisely control the speed and torque of motors in extruders or industrial mixers, commonly found in plastics, food processing, or chemical industries, requiring robust and accurate motor regulation.

Problem Solved

The drive's sensorless vector control ensures high dynamic performance and accurate speed/torque regulation, crucial for maintaining consistent product quality in extrusion or mixing processes. The 75.0 kW rated power and 200% high overload capability handle the varying loads and viscous materials often encountered. The integrated STO (Safe Torque Off) function provides essential safety features for personnel and machinery.

75 kW380-480V 3ACSensorless Vector ControlSTOExtrudersMixersProcess ControlHigh Overload