Siemens SINAMICS G120C 1.5kW Compact VFD PROFINET

Technical Overview

Compact 3AC 380-480V VFD with 1.5 kW (LO) / 1.1 kW (HO) power, IP20, Safe Torque Off, PROFINET/EtherNet/IP, and versatile I/O.

Key Features

Compact design for space-saving cabinet installation.
Integrated Safe Torque Off (STO) safety function, reducing external component needs.
PROFINET and EtherNet/IP communication interfaces for seamless network integration.
Supports both V/f and sensorless vector control for high torques at low frequencies.
Unfiltered for basic applications.
External 24V I/O interface: 6 Digital Inputs, 2 Digital Outputs, 1 Analog Input, 1 Analog Output, 1 Motor Temperature Sensor input.
Optimized and intuitive commissioning with cloning function via optional operator panels or SD card.
High efficiency (η 0.97) for energy savings.

Technical Specification Matrix

Parameter	Value
Input Voltage	3AC 380-480V +10% / -20%
Input Frequency	47-63 Hz
Rated Power (Low Overload LO)	1.5 kW (at 150% for 3s, 110% for 57s, 100% for 240s)
Rated Power (High Overload HO)	1.1 kW (at 200% for 3s, 150% for 57s, 100% for 240s)
Output Rated Current (LO)	4.10 A
Output Rated Current (HO)	3.10 A
Rated Current (IN)	4.30 A
Max. Output Current	6.20 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0 ... 240 Hz
Output Frequency (V/f Control)	0 ... 550 Hz
Filter Class (Integrated)	Unfiltered
Communication Interface	PROFINET, EtherNet/IP
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 Inputs (Differential)	1 (10 bit resolution)
Analog Outputs (Non-isolated)	1
Motor Temperature Sensor Input	1 (PTC, KTY, Thermo-Click compatible)
Safety Feature	Safe Torque Off (STO) integrated
Protection Class	IP20 / UL Open Type
Efficiency η	0.97
Sound Pressure Level (1m)	49 dB
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 in Logistics

This drive can precisely control the speed and torque of motors driving conveyor belts in logistics hubs, ensuring smooth material flow and preventing jams. The 1.5 kW low overload rating is suitable for continuous, moderately loaded operations, while the 1.1 kW high overload provides brief bursts of extra torque for starting or handling temporary heavy loads. The integrated Safe Torque Off (STO) function is critical for personnel safety during maintenance or emergency stops. PROFINET integration allows for seamless communication with a central PLC for synchronized operations.

Problem Solved

Precise speed control and safe operation of conveyor systems, enhancing efficiency and operator safety in material handling.

Variable Frequency DriveConveyor ControlSafe Torque Off (STO)PROFINET1.5 kW380-480VIP20

2. Industrial Fan and Pump Control in HVAC Systems

The SINAMICS G120C is ideal for controlling industrial fans and pumps in HVAC (Heating, Ventilation, and Air Conditioning) systems. Its ability to provide variable speed control (0-550 Hz V/f control) allows for energy optimization by adjusting motor speed based on demand, rather than running at full speed constantly. The input voltage range of 380-480V is standard for industrial power grids, and the IP20 rating is suitable for installation within a protective cabinet in a controlled environment. The integrated I/O allows for direct connection of sensors and control signals.

Problem Solved

Energy efficient and demand-driven control of industrial fans and pumps, reducing operational costs and improving system performance in HVAC applications.

HVACFan ControlPump ControlEnergy EfficiencyVariable Speed DriveV/f Control380-480VIP20Analog Input/Output

3. Packaging Machinery Motor Control

In packaging machinery, precise and dynamic motor control is crucial for operations like filling, sealing, and labeling. The G120C's vector control (0-240 Hz) provides high torque at low speeds, essential for accurate positioning and rapid acceleration/deceleration of machine axes. The compact FSAA size (173x73x160mm) is beneficial for integration into space-constrained packaging machines. The PROFINET/EtherNet/IP communication ensures quick and reliable data exchange with higher-level machine controllers, enabling coordinated motion sequences.

Problem Solved

Precise, dynamic, and synchronized motor control for complex packaging processes, improving machine throughput and product quality.

Packaging MachineryMotor ControlVector ControlHigh TorquePROFINETEtherNet/IPCompact Design380-480V