Siemens SINAMICS G120C 11kW Compact Frequency Inverter

Technical Overview

380-480V 3AC input, 11.0kW (LO) / 7.5kW (HO) output, IP20, with integrated STO and PROFINET-PN. Optimizes motor speed for energy efficiency.

Key Features

Compact design for space-saving installation.
Short commissioning times and easy handling.
Energy-saving functions for efficient operation.
Integrated Safe Torque Off (STO) for machine safety.
PROFINET-PN fieldbus communication for seamless integration into automation systems.
Versatile I/O: 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output.
Supports V/f control (0-550 Hz) and vector control (0-240 Hz) for flexible motor speed regulation.
Robust with IP20 / UL OPEN TYPE protection for industrial environments.

Technical Specification Matrix

Parameter	Value
Input Voltage	3AC 380-480V +10% -20%
Input Frequency	47-63 Hz
Rated Power (Low Overload LO)	11.00 kW (15.00 hp)
Rated Current (Low Overload LO)	25.00 A
Rated Power (High Overload HO)	7.50 kW (10.00 hp)
Rated Current (High Overload HO)	16.50 A
Output Voltage	400V IEC / 480V NEC
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Pulse Frequency	4 kHz
Protection Rating	IP20 / UL OPEN TYPE
Digital Inputs	6
Digital Outputs	2 (relay switched, DC 30V, 0.5A)
Analog Inputs	1
Analog Outputs	1
Fieldbus Communication	PROFINET-PN
Safety Function	Integrated Safe Torque Off (STO)
Physical Weight (kg)	5.2
Dimensions L x W x H (cm)	27 x 36.5 x 16

Industrial Applications

1. Conveyor Belt Speed Control in Manufacturing

This inverter can precisely control the speed of conveyor belts in manufacturing lines. The 11 kW power rating is suitable for medium to heavy-duty conveyor systems. The integrated Safe Torque Off (STO) ensures immediate and safe stopping of the conveyor during emergencies, meeting safety regulations. PROFINET-PN allows for seamless integration into a larger automated production system, enabling centralized control and monitoring of conveyor speeds.

Problem Solved

Prevents product damage due to inconsistent conveyor speeds, ensures worker safety with STO, and allows for flexible production rates via PROFINET-PN integration.

Variable Frequency DriveConveyor SystemSafe Torque Off (STO)PROFINET-PNMotor ControlProduction LineAutomation

2. Pump Control in HVAC Systems

The SINAMICS G120C can be used to control the speed of pumps in HVAC (Heating, Ventilation, and Air Conditioning) systems. By varying the pump speed, the system can efficiently adjust water flow rates based on demand, leading to significant energy savings. The 380-480V input matches typical industrial power supplies, and its compact size is beneficial for integration into existing equipment rooms. The IP20 rating is acceptable for enclosed electrical cabinets in such environments.

Problem Solved

Optimizes energy consumption in HVAC systems by running pumps only at required speeds, reduces wear and tear on pumps, and provides precise flow control for temperature regulation.

HVACPump ControlEnergy EfficiencyVariable Speed DriveFlow RateMotor ControlBuilding Automation

3. Fan Speed Regulation in Industrial Ventilation

In industrial ventilation systems, this inverter can control the speed of large exhaust or supply fans. The 11 kW power is appropriate for driving substantial fan motors. Regulating fan speed dynamically based on air quality sensors or temperature feedback reduces energy consumption and noise levels, while maintaining optimal environmental conditions. PROFINET-PN allows for remote control and integration with building management systems.

Problem Solved

Improves air quality control and reduces energy costs in industrial environments by matching fan output to actual ventilation needs, minimizing noise pollution.

Industrial VentilationFan ControlEnergy SavingAir FlowMotor Speed ControlPROFINETBuilding Management System