Name: Siemens SINAMICS G120C 5.5kW Compact Frequency Converter - INOSAKI
SKU: Siemens-6SL3210-1KE21-3AB1
Price: 472.95 USD
Availability: InStock

Technical Overview

Compact 3-phase 380-480V 5.5kW (LO) frequency converter with integrated Class A filter, USS/MODBUS RTU, STO, and 0-550Hz output for precise motor control.

Key Features

Compact design for space-saving installation.
Integrated Class A line filter reduces electromagnetic interference.
USS/MODBUS RTU communication for flexible integration into control systems.
Integrated Safe Torque Off (STO) function for enhanced machine safety.
External 24V I/O interface with 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output, and 1 motor temperature sensor input.
Energy-efficient sensorless vector control for high torques at low frequencies.
Overload capability: 150% for 3s (LO) / 200% for 3s (HO) within a 300s cycle time.
IP20 / UL OPEN TYPE protection rating for general industrial environments.

Technical Specification Matrix

Parameter	Value
Input Voltage (Phases)	3 AC
Input Voltage Range	380 ... 480 V (+10 % -20 %)
Input Line Frequency	47 ... 63 Hz
Rated Current (Low Overload - LO)	16.50 A
Rated Current (High Overload - HO)	12.80 A
Output Voltage	400V IEC / 480V NEC
Rated Power (LO)	5.50 kW / 7.50 hp
Rated Power (HO)	4.00 kW / 5.00 hp
Output Frequency (Vector Control)	0 ... 240 Hz
Output Frequency (V/f Control)	0 ... 550 Hz
Maximum Output Current	17.60 A
Pulse Frequency	4 kHz
Power Factor λ	0.70 ... 0.85
Efficiency η	0.97
Power Loss	173.0 W
Integrated Filter Class	Class A
Communication Protocol	USS/MODBUS RTU
Digital Inputs (Standard)	6
Digital Inputs (Fail-safe)	1
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 / Digital Inputs	1 (Differential, 10 bit resolution)
Analog Outputs	1 (Non-isolated)
Motor Temperature Sensor Input	1 (PTC, KTY compatible)
Protection Rating	IP20 / UL OPEN TYPE
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 Logistics

This converter precisely controls the speed of conveyor belts in automated warehouses and manufacturing lines. Its 5.5 kW (LO) rated power and 0-550 Hz output frequency allow for adaptable material flow, while the integrated Safe Torque Off (STO) function provides critical emergency stopping capabilities, enhancing operator safety and preventing damage.

Problem Solved

Provides accurate, energy-efficient speed adjustment and critical safety for material handling systems, optimizing throughput and safeguarding personnel.

Variable speed driveConveyor systemsMaterial handlingSafe Torque Off (STO)Industrial automationProcess control

2. Optimized Pump and Fan Control in HVAC Systems

Ideal for managing centrifugal pumps and fans in large-scale HVAC installations or water treatment facilities, the drive's 3-phase 380-480V input and 5.5 kW (LO) capacity efficiently power these loads. The integrated Class A filter minimizes electromagnetic interference, ensuring stable operation in electrically sensitive environments, and sensorless vector control enables smooth starts.

Problem Solved

Reduces energy consumption and mechanical stress on pumps and fans by precisely matching motor speed to demand, while maintaining electromagnetic compatibility.

HVAC systemsPump controlFan controlEnergy efficiencyVariable frequency driveEMC filtering

3. Flexible Spindle Control for Light Machine Tools

The inverter offers versatile speed control for smaller machine tool spindles, such as those used in drilling, milling, or grinding applications. Its 0-550 Hz output frequency and sensorless vector control deliver a broad range of speeds and good torque characteristics. The integrated digital and analog I/O allows direct connection for speed reference and operational status, with IP20 protection suitable for cabinet integration.

Problem Solved

Enables adaptable and precise spindle speed adjustment, improving machining versatility, material compatibility, and overall product quality for light industrial machinery.

Machine toolsSpindle controlMotor controlIndustrial machineryManufacturing automationVariable speed