Name: Siemens SINAMICS G120C 5.5kW Compact Frequency Converter - INOSAKI
SKU: Siemens-6SL3210-1KE21-3UB1
Price: 415.69 USD
Availability: InStock

Technical Overview

3-phase, 380-480V compact frequency converter with 5.5kW (LO) / 4.0kW (HO) output, IP20, and integrated STO.

Key Features

Compact design (FSB size) optimized for space utilization in control cabinets.
Integrated Safe Torque Off (STO) for safety-related motor shutdown without external components.
USS/MODBUS RTU communication interface for flexible integration with PLCs and HMI systems.
Wide input voltage range of 380-480 V (3 AC) with +10% / -20% tolerance, suitable for various industrial power grids.
Unfiltered I/O interface including 6 standard digital inputs, 1 fail-safe digital input, 2 digital outputs, and 1 analog input/output.
Supports control of asynchronous (induction) motors with vector and V/f control modes.
IP20 / UL open type protection for installation in dry, protected environments.

Technical Specification Matrix

Parameter	Value
Input Number of phases	3 AC
Input Line voltage	380 ... 480 V +10 % -20 %
Input Line frequency	47 ... 63 Hz
Input Rated current (LO)	16.50 A
Input Rated current (HO)	12.80 A
Output Number of phases	3 AC
Output Rated voltage	400V IEC / 480V NEC
Output Rated power (LO)	5.50 kW (7.50 hp)
Output Rated power (HO)	4.00 kW (5.00 hp)
Output Rated current (LO)	12.50 A
Output Rated current (HO)	8.80 A
Max. output current	17.60 A
Pulse frequency	4 kHz
Output frequency for vector control	0 ... 240 Hz
Output frequency for V/f control	0 ... 550 Hz
Low Overload (LO) capability	150 % base load current IL for 3 s, followed by 110 % base load current IL for 57 s in a 300 s cycle time
High Overload (HO) capability	200% base load current IH for 3 s, followed by 150% base load current IH for 57 s in a 300 s cycle time
Power factor λ	0.70 ... 0.85
Offset factor cos φ	0.95
Efficiency η	0.97
Sound pressure level (1m)	63 dB
Power loss	169.0 W
Filter class (integrated)	Unfiltered
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 input, 10 bit resolution)
Analog outputs	1 (Non-isolated output)
PTC/KTY interface	1 motor temperature sensor input
Protection rating	IP20 / UL open type
Physical Weight (kg)	2.7
Dimensions L x W x H (cm)	26 x 25.5 x 12.5

Industrial Applications

1. Conveyor Belt Speed Control

This frequency converter can precisely control the speed of induction motors driving conveyor belts in manufacturing or logistics, ensuring smooth material flow and preventing bottlenecks. Its vector control (0-240 Hz) allows for accurate and dynamic speed adjustments.

Problem Solved

Inconsistent material handling and potential damage to delicate products due to abrupt starts/stops or variable speeds are mitigated by the precise motor control offered by the G120C.

Vector ControlConveyor SystemsMotor Speed Control3-Phase Motor5.5 kW

2. Pump and Fan Applications

Ideal for variable speed control of pumps and fans in HVAC systems, water treatment plants, or industrial cooling, optimizing energy consumption. The 5.5 kW rating and 380-480V input are suitable for common industrial pump/fan motors, while IP20 ensures protection within a control cabinet.

Problem Solved

High energy consumption and inefficient operation of pumps and fans running at fixed speeds are addressed by allowing precise adjustment to meet demand, leading to significant energy savings and reduced wear.

Variable Speed DriveEnergy EfficiencyHVACWater TreatmentIP20

3. Machine Tool Spindle Control (Basic)

Suitable for basic spindle speed control in smaller machine tools or woodworking machinery where precise but not extremely high-dynamic control is needed. The 4.0 kW (HO) capability and 0-550 Hz V/f control range provide adequate performance for such applications.

Problem Solved

Limited flexibility and precision in material processing due to fixed or stepped spindle speeds are overcome, enabling better surface finish and adaptability for various materials and operations.

Spindle ControlV/f ControlMachine Tools4.0 kWIndustrial Automation