Name: Siemens SINAMICS G120C 1.5kW Compact Frequency Inverter - INOSAKI
SKU: Siemens-6SL3210-1KE14-3UB2
Price: 323.72 USD
Availability: InStock

Technical Overview

Compact 3AC 380-480V inverter for 1.5kW (LO) / 1.1kW (HO) motors, featuring IP20 protection, USS/MODBUS RTU, and Safe Torque Off functionality.

Key Features

3-phase AC input voltage of 380-480V (+10% / -20%) and 47-63 Hz frequency.
Rated power of 1.5 kW (Low Overload) or 1.1 kW (High Overload) output.
IP20 / UL open type degree of protection.
Equipped with an integrated fan for air cooling.
Features 6 standard digital inputs, 1 fail-safe digital input, 1 relay digital output, 1 transistor digital output, 1 analog/digital input, and 1 analog output.
Supports USS and MODBUS RTU fieldbus protocols for communication.
Offers an output frequency range of 0-240 Hz for vector control and 0-550 Hz for V/f control.
Compact FSAA frame size with dimensions of 173 mm (H) x 73 mm (W) x 155 mm (D).

Technical Specification Matrix

Parameter	Value
Input Voltage	3AC 380-480 V +10% -20%
Line Frequency	47-63 Hz
Rated Power (Low Overload)	1.50 kW / 2.00 hp
Rated Power (High Overload)	1.10 kW / 1.50 hp
Input Rated Current (LO)	5.50 A
Input Rated Current (HO)	4.50 A
Output Rated Current (LO)	4.10 A
Output Rated Current (HO)	3.10 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
Degree of Protection	IP20 / UL open type
Frame Size	FSAA
Ambient Temperature (Operation)	-10 to 40 °C (14 to 104 °F)
Cooling	Air cooling using an integrated fan
Communication Interface	USS/MODBUS RTU
Standard Digital Inputs	6
Fail-safe Digital Inputs	1
Digital Outputs (Relay Changeover Contact)	1
Digital Outputs (Transistor)	1
Analog/Digital Inputs	1 (Differential input)
Analog Outputs	1 (Non-isolated output)
Safety Feature	Safe Torque Off (STO)
Filter Class (Integrated)	Unfiltered
Line Cable Conductor Cross-section	1.00 - 2.50 mm² (AWG 18 - AWG 14)
Motor Cable Length (Shielded/Unshielded)	Max. 150 m
Power Factor λ	0.70 - 0.85
Efficiency η	0.97
Sound Pressure Level (1m)	49 dB
Power Loss	60.3 W
Physical Weight (kg)	1.1
Dimensions L x W x H (cm)	22.5 x 27 x 8.5

Industrial Applications

1. Precise Conveyor Belt Speed Control

This inverter is ideal for controlling the speed of 1.5 kW 3-phase AC motors on conveyor systems in manufacturing or logistics facilities. Its variable frequency output (0-550 Hz V/f control) ensures smooth acceleration and deceleration, allowing for precise adjustment of conveyor speed to match different production requirements or product types. The integrated Safe Torque Off (STO) function enhances operator safety during machine maintenance.

Problem Solved

Traditional fixed-speed conveyor systems lack flexibility for varying product throughputs and can lead to inefficient energy consumption or product damage. This inverter provides dynamic speed control to optimize material flow and reduce wear on mechanical components.

Variable Speed DriveMotor ControlConveyor SystemsSafe Torque Off (STO)3-Phase AC MotorEnergy Efficiency

2. Optimized Pump Control in HVAC Systems

The SINAMICS G120C can effectively manage small to medium-sized pumps (up to 1.5 kW) within Heating, Ventilation, and Air Conditioning (HVAC) systems. By adjusting pump speed based on demand, it can significantly reduce energy consumption and maintain precise environmental conditions. Its USS/MODBUS RTU communication capability allows seamless integration with Building Management Systems (BMS) for centralized control and monitoring, while the IP20 rating suits typical plant room installations.

Problem Solved

Fixed-speed pumps in HVAC systems often operate at maximum capacity, leading to excessive energy use and fluctuating pressure. This inverter provides demand-oriented speed control, optimizing system performance and reducing operational costs.

HVAC ControlPump SystemsEnergy SavingMODBUS RTUBuilding Management System (BMS)Variable Frequency Drive

3. Fan Speed Regulation for Industrial Process Control

This frequency inverter is well-suited for regulating the speed of exhaust or circulation fans (up to 1.5 kW) in industrial processes like ovens, dryers, or ventilation systems where precise airflow is critical. The wide output frequency range (up to 550 Hz V/f control) enables fine-tuning of air movement, which directly impacts process parameters such as temperature uniformity and drying rates. The digital and analog I/O can be used to integrate feedback from temperature or pressure sensors for automated closed-loop control.

Problem Solved

Inconsistent airflow in industrial processes can lead to poor product quality, energy waste, and inefficient operation. This drive ensures precise and adjustable fan speed control, optimizing process outcomes and energy usage.

Fan ControlIndustrial DryingProcess AutomationAirflow ControlPID ControlAnalog I/O