Siemens SINAMICS G120C 7.5kW 400V AC Compact Inverter

USD 540.01

Compact 7.5kW (LO) AC inverter with 380-480V 3AC input, IP20, integrated Class A filter, Safe Torque Off, and USS/MODBUS RTU for precise motor control.

SKU Siemens-6SL3210-1KE21-7AB1 Category
Top Brands > Siemens > Siemens Compact Converters

Siemens SINAMICS G120C 7.5kW 400V AC Compact Inverter

Model Identifier SINAMICS G120C
Official Part Number 6SL3210-1KE21-7AB1
GTIN Standard 4042948663134

Technical Overview

Compact 7.5kW (LO) AC inverter with 380-480V 3AC input, IP20, integrated Class A filter, Safe Torque Off, and USS/MODBUS RTU for precise motor control.

Key Features

  • Compact design allows for easy integration into space-constrained control panels.
  • Integrated Class A filter minimizes electromagnetic interference.
  • Safe Torque Off (STO) function integrated to SIL 2 (EN 61508) for enhanced machine safety.
  • Supports USS/MODBUS RTU fieldbus communication for versatile system integration.
  • Offers V/f and sensorless vector control for precise speed and torque regulation of standard AC induction motors.
  • Features a comprehensive I/O interface including 6 digital inputs, 2 digital outputs (1 relay, 1 transistor), 1 analog input, 1 analog output, and 1 motor temperature sensor input.
  • Provides energy-efficient motor control, contributing to reduced operational costs.

High overload capacity of 5.5 kW (HO) at 200% for 3 seconds, followed by 150% for 57 seconds within a 300-second cycle, ideal for demanding applications.

Technical Specification Matrix

ParameterValue
Input Voltage3AC 380-480 V +10% -20%
Line Frequency47-63 Hz
Rated Power (Low Overload - LO)7.50 kW (10.00 hp)
Rated Power (High Overload - HO)5.50 kW (7.50 hp)
Rated Current (LO)16.50 A
Rated Current (HO)12.50 A
Max. Output Current25.00 A
Output Frequency (Vector Control)0-240 Hz
Output Frequency (V/f Control)0-550 Hz
Pulse Frequency4 kHz
Overload Capability (LO)150% base load current IL for 3 s, then 110% for 57 s in a 300 s cycle
Overload Capability (HO)200% base load current IH for 3 s, then 150% for 57 s in a 300 s cycle
Enclosure RatingIP20 / UL OPEN TYPE
Integrated Filter ClassClass A
Communication InterfaceUSS/MODBUS RTU
Standard Digital Inputs6
Fail-safe Digital Inputs1
Digital Outputs (Relay)1 (DC 30 V, 0.5 A resistive load)
Digital Outputs (Transistor)1 (DC 30 V, 0.5 A resistive load)
Analog Inputs1 (Differential input, 10-bit resolution)
Analog Outputs1 (Non-isolated output)
Power Loss235.0 W
Sound Pressure Level (1m)63 dB
Power Factor λ0.70 - 0.85
Offset Factor cos φ0.95
Efficiency η0.97
Physical Weight (kg)3
Dimensions L x W x H (cm)26 x 25.5 x 12.5

Industrial Applications

1. Conveyor Belt Speed Control in Packaging Lines

This inverter provides precise speed control for 7.5 kW motors driving conveyor belts, allowing for flexible production rates in packaging machinery. Its compact dimensions facilitate easy integration into existing control cabinets, and the IP20 rating is suitable for dry indoor environments typical of packaging facilities. The integrated Safe Torque Off (STO) function enhances operational safety.

Problem Solved

Enables dynamic adjustment of conveyor speeds to match varying packaging demands, optimizing throughput and reducing energy consumption. STO ensures critical safety during manual intervention or emergency stops.

Variable speed driveConveyor systemsPackaging machinery7.5 kW motor controlIP20Safe Torque OffModbus RTU

2. Industrial Fan Control for HVAC Systems

The Siemens G120C efficiently regulates the speed of 7.5 kW industrial fans in HVAC systems within commercial or industrial buildings. Utilizing V/f or sensorless vector control, it optimizes airflow and pressure. The 380-480V input voltage is compatible with standard industrial power supplies, and the integrated Class A filter minimizes electromagnetic interference with sensitive building automation systems.

Problem Solved

Reduces energy consumption and operational costs by precisely matching fan speed to ventilation requirements. The integrated EMC filter ensures compatibility with other building electronics, while Modbus RTU enables seamless integration into Building Management Systems (BMS).

HVACIndustrial fansEnergy efficiency7.5 kW motorV/f controlSensorless vector controlModbus RTUClass A filter

3. Pump Control in Indoor Water Treatment Processes

This compact inverter is ideal for controlling pumps up to 7.5 kW in indoor segments of water treatment facilities, for applications such as chemical dosing or fluid transfer. Its robust overload capabilities (150% for 57s) support demanding pump operations like start-up or clearing minor blockages. The IP20 enclosure is appropriate for controlled indoor settings.

Problem Solved

Optimizes pump performance, extends equipment lifespan through soft starting, and provides precise flow regulation, reducing mechanical stress and hydraulic shock. The STO function adds a critical safety layer for personnel during maintenance procedures on the pumps.

Pump controlWater treatmentFlow regulation7.5 kW pump motorHigh overload capabilityIP20Soft startSafe Torque Off
Select your currency