Technical Overview

Compact 11kW, 380-480V 3AC frequency inverter with IP20 rating, integrated STO safety, and USS/MODBUS RTU communication for industrial motor control.

Key Features

Rated Output Power (Low Overload): 11.00 kW (15.00 hp)
Rated Output Power (High Overload): 7.50 kW (10.00 hp)
Supply Voltage: 3AC 380–480 V ±10% / -20%, 47–63 Hz
Protection Rating: IP20 / UL OPEN TYPE
Integrated Safety Functions: Safe Torque Off (STO)
Communication Interface: USS/MODBUS RTU
Inputs: 6 Standard Digital Inputs, 1 Fail-safe Digital Input, 1 Analog/Digital Input (10-bit resolution)
Outputs: 1 Relay Changeover Contact Digital Output, 1 Transistor Digital Output, 1 Analog Output
Cooling: Internal air cooling
Operating Temperature: –10 °C to +40 °C (without derating)
Efficiency: 0.97
Filter Class: Unfiltered (integrated)

Technical Specification Matrix

Parameter	Value
Siemens Code	6SL3210-1KE22-6UB1
Series	SINAMICS G120C
Rated Output Power (LO)	11.00 kW / 15.00 hp
Rated Output Power (HO)	7.50 kW / 10.00 hp
Supply Voltage	3AC 380–480 V ±10% / -20%
Line Frequency	47–63 Hz
Rated Output Current (LO)	25.00 A
Rated Output Current (HO)	16.50 A
Protection Rating	IP20 / UL OPEN TYPE
Operating Temperature	–10 °C to +40 °C (without derating)
Cooling	Internal air cooling
Safety Functions	STO (Safe Torque Off) integrated
Communication Interface	USS/MODBUS RTU
Standard Digital Inputs	6
Fail-safe Digital Inputs	1
Digital Outputs (Relay)	1
Digital Outputs (Transistor)	1
Analog Inputs	1 (Differential, 10 bit resolution)
Analog Outputs	1 (Non-isolated)
PTC/KTY Interface	1
Efficiency	0.97
Power Loss	292.0 W
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0 ... 240 Hz
Output Frequency (V/f Control)	0 ... 550 Hz
Physical Weight (kg)	5.2
Dimensions L x W x H (cm)	27 x 36.5 x 16

Industrial Applications

1. Conveyor Belt Speed Control with Safety Interlock

This inverter can precisely control the speed of an 11 kW motor driving a conveyor belt system in a manufacturing plant. Its USS/MODBUS RTU communication allows seamless integration with existing PLCs, while the integrated Safe Torque Off (STO) function provides an immediate and safe stop in emergencies, crucial for personnel safety and maintenance. The IP20 rating is suitable for typical indoor industrial environments.

Problem Solved

Ensuring precise speed control for material handling and providing immediate, safe shutdown of conveyor motors in an emergency, improving operational efficiency and worker safety.

Motor ControlConveyor SystemsVariable Speed DriveSafe Torque Off (STO)MODBUS RTU11 kW Motor

2. Industrial Pump and Fan Control for HVAC Systems

The SINAMICS G120C is ideal for variable speed control of 11 kW pumps or fans in large industrial HVAC or fluid management systems. Its 380-480V input voltage is standard for such applications, and the efficiency of 0.97 helps reduce energy consumption. The compact size allows for installation in constrained equipment rooms, while the internal air cooling ensures reliable operation.

Problem Solved

Optimizing energy consumption and maintaining precise flow/pressure in large-scale pumping or ventilation systems by accurately controlling motor speeds, even in compact spaces.

Pump ControlFan ControlHVAC SystemsEnergy EfficiencyVariable Frequency DriveIP20

3. Machine Tool Spindle Speed Regulation

For small to medium-sized machine tools requiring precise spindle speed regulation, this 11 kW inverter provides reliable control. The ability to handle both low (150%) and high (200%) overload conditions makes it suitable for varying machining loads. The digital and analog I/O can interface directly with machine controls for speed setpoints and feedback, ensuring accurate and repeatable machining processes.

Problem Solved

Achieving highly accurate and dynamic speed control for machine tool spindles, adapting to different material processing requirements and loads while integrating with existing control systems.

Spindle ControlMachine ToolsVariable SpeedOverload CapabilityDigital I/OAnalog I/O

Siemens SINAMICS G120C 11kW Compact Inverter

Siemens SINAMICS G120C 11kW Compact Inverter

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Conveyor Belt Speed Control with Safety Interlock

2. Industrial Pump and Fan Control for HVAC Systems

3. Machine Tool Spindle Speed Regulation