Technical Overview

Compact 1.1kW variable frequency drive with 380-480V 3AC input, IP20, PROFINET, Class A filter, and Safe Torque Off functionality.

Key Features

3-phase 380-480V AC input voltage with +10%/-20% tolerance.
Rated power of 1.1 kW (Low Overload) and 0.75 kW (High Overload).
Integrated Class A line filter for EMC compliance.
IP20 / UL OPEN TYPE protection rating.
PROFINET-PN fieldbus for seamless industrial integration.
Safe Torque Off (STO) function to SIL 2.
External 24V I/O interface: 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output, 1 motor temperature input.
Output frequency up to 550 Hz for V/f control.
Side-by-side mounting without derating.
High power density, reducing cabinet space.

Technical Specification Matrix

Parameter	Value
Input Voltage	3AC 380-480V +10/-20%
Line Frequency	47-63Hz
Rated Power (Low Overload)	1.1 kW (1.50 hp)
Rated Current (Low Overload - Input)	4.10 A
Rated Current (Low Overload - Output)	3.10 A
Rated Power (High Overload)	0.75 kW (1.00 hp)
Rated Current (High Overload - Input)	3.20 A
Rated Current (High Overload - Output)	2.20 A
Max. Output Current	4.40 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Overload Capability (Low Overload)	150% base load current for 3s, then 110% for 57s in a 300s cycle time.
Overload Capability (High Overload)	200% base load current for 3s, then 150% for 57s in a 300s cycle time.
Integrated Filter Class	Class A
Digital Inputs (Standard)	6
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 compatible)
Safety Function	Safe Torque Off (STO)
Integrated Fieldbus	PROFINET-PN, EtherNet/IP
Protection Rating	IP20 / UL OPEN TYPE
Frame Size	FSAA
Efficiency	0.97
Power Loss	49.0 W
Physical Weight (kg)	1.4
Dimensions L x W x H (cm)	22.5 x 27 x 8.5

Industrial Applications

1. Conveyor Belt Systems in Manufacturing

The SINAMICS G120C precisely controls the speed of motors driving conveyor belts, enabling flexible production rates and optimized material flow. The 1.1 kW low overload rating is suitable for continuous operation, while the 150% overload for 3 seconds handles short-term peak loads. Its IP20 rating makes it suitable for control cabinet installation in typical factory environments, and PROFINET integration ensures seamless communication with central control systems.

Problem Solved

Prevents material damage from abrupt starts/stops, optimizes throughput, and enables integration into automated production lines.

Variable Speed ControlMaterial HandlingLow OverloadPROFINETIP20

2. Pump Control in HVAC or Water Treatment

This VFD efficiently regulates the speed of pump motors in HVAC systems for pressure/flow maintenance or in water treatment plants for precise chemical dosing and level control. The 380-480V input voltage is standard for industrial pump applications, and the 0.75 kW high overload rating (with 200% for 3s) manages higher starting torque requirements. Energy savings are achieved by operating pumps at optimal speeds.

Problem Solved

Reduces energy consumption, prevents water hammer, and provides precise flow/pressure control for fluid systems.

Energy EfficiencyFluid ControlHigh Overload3-Phase 400VAnalog I/O

3. Fan Speed Control in Industrial Ventilation

The Siemens G120C varies the speed of industrial ventilation fans to maintain optimal air quality or temperature, adapting to changing environmental conditions or production needs. The 1.1 kW power rating is appropriate for a range of industrial fans, and the integrated Class A filter minimizes electrical interference. Its compact size (173 x 73 x 160 mm) allows for installation in space-constrained control panels.

Problem Solved

Optimizes air circulation, reduces noise levels, saves energy, and allows for precise environmental control.

HVACVentilationEnergy SavingCompact DesignClass A Filter

Siemens SINAMICS G120C PN 1.1kW Variable Frequency Drive

Siemens SINAMICS G120C PN 1.1kW Variable Frequency Drive

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Conveyor Belt Systems in Manufacturing

2. Pump Control in HVAC or Water Treatment

3. Fan Speed Control in Industrial Ventilation