Technical Overview

3-phase 380-480V compact frequency converter with 0.55kW (LO)/0.37kW (HO) power, IP20, integrated Class A filter, and STO. Perfect for pumps/fans.

Key Features

3-phase, 380-480 V (+10% / -20%) input voltage.
Rated power of 0.55 kW (Low Overload) or 0.37 kW (High Overload).
Integrated Class A filter for electromagnetic compatibility (EMC).
USS/MODBUS RTU communication for seamless network integration.
Safe Torque Off (STO) function to SIL 2 for enhanced machine safety.
IP20 / UL open type protection for reliable operation in various environments.
Compact FSAA frame size (173 mm H x 73 mm W x 155 mm D) for space-saving installations.
Multiple I/O options: 6 Digital Inputs, 2 Digital Outputs (1 relay, 1 transistor), 1 Analog Input, 1 Analog Output, 1 Motor Temperature Input.
High efficiency (η 0.97) minimizes power loss and energy consumption.

Technical Specification Matrix

Parameter	Value
Input Voltage	3 AC 380-480 V (+10% / -20%)
Line Frequency	47-63 Hz
Rated Power (Low Overload LO)	0.55 kW / 0.75 hp
Rated Power (High Overload HO)	0.37 kW / 0.50 hp
Input Rated Current (LO)	2.30 A
Input Rated Current (HO)	1.90 A
Output Rated Current (LO)	1.70 A
Output Rated Current (HO)	1.30 A
Max. Output Current	2.60 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Efficiency (η)	0.97
Sound Pressure Level (1m)	49 dB
Power Loss	33.8 W
Filter Class	Integrated Class A
Communication Interface	USS/MODBUS RTU
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, 10-bit resolution)
Analog Outputs	1 (Non-isolated)
Motor Temperature Sensor Input	1 (PTC, KTY compatible)
Degree of Protection	IP20 / UL open type
Physical Weight (kg)	1.3
Dimensions L x W x H (cm)	22.5 x 27 x 8.5

Industrial Applications

1. Industrial Pump Control in Water Treatment Facilities

This drive precisely controls pumps in water treatment plants, managing varying flow rates for purification, chemical dosing, or water transfer. Its 0.55 kW (LO) / 0.37 kW (HO) power rating and high efficiency are ideal for continuous operation in such critical infrastructure. The IP20 rating ensures safe installation within a control cabinet.

Problem Solved

Enables energy-efficient and precise flow control, reduces mechanical stress on pumps by avoiding direct-on-line starts, and allows for integration into supervisory control systems via Modbus RTU, enhancing operational flexibility and reducing maintenance.

Variable speed driveCentrifugal pumpFlow controlEnergy efficiencyModbus RTUIP20380-480V

2. HVAC Fan Control in Commercial Buildings

The SINAMICS G120C efficiently regulates the speed of ventilation fans in large commercial or industrial HVAC systems. Its optimization for fan applications, including ECO mode, directly addresses energy savings and optimized air circulation based on demand. The integrated Class A filter minimizes electromagnetic interference in sensitive building environments.

Problem Solved

Provides precise air volume control, reduces energy consumption during partial load conditions, minimizes noise levels, and integrates with building management systems for automated environmental control, ensuring comfortable and energy-efficient building operation.

Variable frequency driveVentilation fanHVACEnergy optimizationClass A filterV/f control380-480V

3. Small Conveyor Systems in Manufacturing

With its 0.37 kW high overload rating, this drive can manage the start-stop and speed variations typical of small to medium-sized conveyor belts in manufacturing or packaging lines. The Safe Torque Off (STO) function is crucial for operator safety during maintenance or emergency stops, complying with safety standards. Its compact design facilitates easy integration into existing machinery.

Problem Solved

Offers controlled acceleration/deceleration, prolonging conveyor belt and motor life, provides essential safety features for personnel, and enables speed adjustments for different production rates or product types.

Motor controlConveyor beltConstant torqueSafe Torque Off (STO)IP20Manufacturing automation380-480V

Siemens SINAMICS G120C 0.55kW Compact Frequency Converter

Siemens SINAMICS G120C 0.55kW Compact Frequency Converter

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Industrial Pump Control in Water Treatment Facilities

2. HVAC Fan Control in Commercial Buildings

3. Small Conveyor Systems in Manufacturing