Siemens SINAMICS G120XA 1.5 kW 3AC Frequency Converter

Technical Overview

1.5 kW 3-phase AC frequency converter, 380-440V input, 400V output, V/f and sensorless vector control, IP20, integrated fan. Supports Modbus RTU.

Key Features

Three-phase AC input (380-440 V, 47-63 Hz) and output (400 V).
Rated power of 1.50 kW (LO) with a maximum output current of 4.50 A.
Supports V/f linear/square-law, FCC, and sensorless vector control up to 550 Hz.
Equipped with 6 standard digital inputs (11 V/5 V switching), 4 digital relay changeover contact outputs (DC 30 V, 1.0 A), and 2 differential analog inputs/outputs.
Integrated PTC/KTY interface for accurate motor temperature monitoring (PTC, KTY, PT1000, Thermo-Click).
Communication via USS, Modbus RTU, and BACnet MS/TP protocols.
IP20 / UL open type degree of protection and FSA frame size.
Operates with IE2 efficiency class and a high power factor (0.99).
Compact dimensions: 73 mm (W) x 232 mm (H) x 209 mm (D).
Wide operating temperature range from -20 °C to 60 °C at altitudes up to 1,000 m.
Screw-type terminals for secure signal, line, and motor connections.

Technical Specification Matrix

Parameter	Value
Input Number of Phases	3 AC
Input Line Voltage	380 ... 440 V +10%-20%
Input Line Frequency	47 ... 63 Hz
Input Rated Current (LO)	3.60 A
Output Number of Phases	3 AC
Output Rated Voltage	400 V
Output Rated Power IEC 400V (LO)	1.50 kW
Output Rated Current 400V (IN)	4.10 A
Output Rated Current 380V (IN)	4.10 A
Output Rated Current (LO)	4.10 A
Output Max. Output Current	4.50 A
Output Pulse Frequency	4 kHz
Output Frequency for Vector Control	0 ... 240 Hz
Output Frequency for V/f Control	0 ... 550 Hz
Overload Capability (Low Overload LO)	110% base load current IL for 60 s in a 600 s cycle time
Power Factor λ	0.75 ... 0.93
Power Factor cos φ 1	0.99
Efficiency η	0.97
Sound Pressure Level (1m)	55 dB
Power Loss	0.072 kW
Integrated Filter Class	Unfiltered
EMC Category (with accessories)	without
Safety Function Safe Torque Off	without SIRIUS device (e.g. via S7-1500F)
Communication Protocols	USS, Modbus RTU, BACnet MS/TP
Standard Digital Inputs Number	6
Standard Digital Inputs Switching Level 0 → 1	11 V
Standard Digital Inputs Switching Level 1 → 0	5 V
Standard Digital Inputs Max. Inrush Current	15 mA
Fail-safe Digital Inputs Number	0
Digital Outputs Number as Relay Changeover Contact	4
Digital Outputs (Resistive Load)	DC 30 V, 1.0 A
Digital Outputs Number as Transistor	0
Analog / Digital Inputs Number	2 (Differential input)
Analog / Digital Inputs Resolution	12 bit
Analog / Digital Inputs Switching Threshold 0-1	4 V
Analog / Digital Inputs Switching Threshold 1-0	1.6 V
Analog Outputs Number	2 (Non-isolated output)
PTC/KTY Interface	1 motor temperature sensor input, sensors that can be connected: PTC, KTY, PT1000 and Thermo-Click, accuracy ±5 °C
V/f Linear / Square-law / Parameterizable	Yes
V/f with Flux Current Control (FCC)	Yes
V/f ECO Linear / Square-law	Yes
Sensorless Vector Control	Yes
Vector Control, with Sensor	No
Encoderless Torque Control	Yes
Torque Control, with Encoder	No
Standard Board Coating Type	Class 3C2, according to IEC 60721-3-3: 2002
Cooling Method	Air cooling using an integrated fan
Cooling Air Requirement	0.005 m³/s (0.177 ft³/s)
Installation Altitude	1,000 m (3,280.84 ft)
Operating Ambient Temperature	-20 ... 60 °C (-4 ... 140 °F)
Transport Ambient Temperature	-40 ... 70 °C (-40 ... 158 °F)
Storage Ambient Temperature	-40 ... 70 °C (-40 ... 158 °F)
Max. Operating Relative Humidity	95% At 40 °C (104 °F), condensation and icing not permissible
Signal Cable Conductor Cross-section	0.15 ... 1.50 mm² (AWG 24 ... AWG 16)
Line Side Connection Version	Screw-type terminal
Line Side Conductor Cross-section	1.50 ... 2.50 mm² (AWG 16 ... AWG 14)
Motor End Connection Version	Screw-type terminals
Motor End Conductor Cross-section	1.50 ... 2.50 mm² (AWG 16 ... AWG 14)
PE Connection	On housing with M4 screw
Max. Motor Cable Length (Shielded)	150 m (492.13 ft)
Max. Motor Cable Length (Unshielded)	300 m (984.25 ft)
Degree of Protection	IP20 / UL open type
Frame Size	FSA
Compliance with Standards	CE, EAC, RCM, RoHS II
CE Marking	EMC Directive 2004/108/EC, Low-Voltage Directive 2006/95/EC
Converter Efficiency Class	IE2
Comparison with Reference Converter (90% / 100%)	35.3%
Physical Weight (kg)	3.1
Dimensions L x W x H (cm)	20.9 x 7.3 x 23.2

Industrial Applications

1. Conveyor Belt Speed Control in Logistics Hubs

The SINAMICS G120XA can precisely control the speed of conveyor belts in logistics and material handling systems, optimizing throughput and reducing energy consumption. Its 1.50 kW rated power and V/f control capabilities allow for smooth acceleration and deceleration of motors, minimizing mechanical stress and wear on equipment. The integrated fan cooling and wide operating temperature range (-20 to 60 °C) ensure reliable performance in demanding warehouse environments.

Problem Solved

Inefficient material flow and excessive energy consumption in conveyor systems due to fixed-speed operations.

V/f control1.50 kW3-phase ACenergy efficiencymaterial handlinglogistics

2. Pump Control for Water Treatment Facilities

This drive is ideal for regulating pumps in water treatment plants, where precise flow control and energy savings are critical. The 0-550 Hz V/f control output frequency allows for fine-tuning pump speeds to match demand, significantly reducing power consumption. Its IP20 rating makes it suitable for integration into control cabinets in industrial settings, and the Modbus RTU communication enables seamless integration with existing SCADA systems for optimized water management.

Problem Solved

High energy costs and inconsistent flow rates in water pumping operations, leading to inefficient treatment processes.

Pump controlV/f control0-550 Hz1.50 kWModbus RTUenergy savingswater treatment

3. Fan and Blower Regulation in HVAC Systems

The SINAMICS G120XA can be utilized to regulate the speed of fans and blowers in large industrial HVAC (Heating, Ventilation, and Air Conditioning) systems. The ability to control output frequency up to 550 Hz for V/f control, combined with its 1.50 kW power rating, allows for dynamic adjustment of airflow based on environmental conditions, leading to improved air quality and substantial energy savings. The low sound pressure level of 55 dB ensures minimal noise impact in operational areas.

Problem Solved

High energy consumption and fixed airflow in industrial ventilation systems, resulting in suboptimal climate control and increased operational costs.

HVACfan controlblower regulationV/f control0-550 Hzenergy efficiencysound pressure