Siemens SINAMICS G120XA 4kW Frequency Converter

Technical Overview

4kW (400V) 3-phase VFD for pump, fan, compressor applications. Features Modbus RTU, BACnet MS/TP, USS, and IP20 protection.

Key Features

3-phase AC input 380-440 V (-20% to +10%) and output 400 V at 4.00 kW.
Integrated fieldbus communication via USS, Modbus RTU, and BACnet MS/TP for seamless system integration.
Robust design with IP20 protection, suitable for control cabinet installation.
Operates reliably in ambient temperatures ranging from -20 °C to +60 °C.
Includes features such as deragging mode for pumps, pipe filling mode, and multi-pump control for optimized operation.
Offers 110% overload capability for 60 seconds within a 600-second cycle time.
Built-in application macros specifically for HVAC, water supply, and wastewater systems.
Conformal coating on PCBs (Class 3C2) for increased resistance to humidity and dust in harsh environments.
Equipped with 6 standard digital inputs, 4 digital relay outputs, 2 analog/digital inputs, and 2 analog outputs.
Integrated motor temperature sensor input compatible with PTC, KTY, PT1000, and Thermo-Click sensors with ±5 °C accuracy.
Supports V/f linear, square-law, and parameterizable closed-loop control techniques.

Technical Specification Matrix

Parameter	Value
Input Phases	3 AC
Line Voltage	380 ... 440 V (+10% -20%)
Line Frequency	47 ... 63 Hz
Rated Input Current (LO)	8.50 A
Output Phases	3 AC
Rated Output Voltage	400 V
Rated Power IEC 400V (LO)	4.00 kW
Rated Output Current (LO)	8.80 A
Max. Output Current	9.70 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0 ... 240 Hz
Output Frequency (V/f Control)	0 ... 550 Hz
Overload Capability (LO)	110% base load current 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)	63 dB
Power Loss	0.121 kW
Filter Class (integrated)	Unfiltered
EMC Category	without (with accessories)
Safety Function	Safe Torque Off without SIRIUS device
Communication Interfaces	USS, Modbus RTU, BACnet MS/TP
Standard Digital Inputs	6
Digital Input Switching Level (0 → 1)	11 V
Digital Input Switching Level (1 → 0)	5 V
Max. Digital Input Inrush Current	15 mA
Fail-safe Digital Inputs	0
Digital Outputs (Relay Changeover Contact)	4
Digital Output (Resistive Load)	DC 30 V, 1.0 A
Digital Outputs (Transistor)	0
Analog / Digital Inputs	2 (Differential input)
Analog / Digital Input Resolution	12 bit
Analog / Digital Input Switching Threshold (0 → 1)	4 V
Analog / Digital Input Switching Threshold (1 → 0)	1.6 V
Analog Outputs	2 (Non-isolated output)
Motor Temperature Sensor Input	1 (PTC, KTY, PT1000, Thermo-Click, accuracy ±5 °C)
Closed-loop Control Techniques	V/f linear / square-law / parameterizable
IP Rating	IP20
Ambient Temperature	-20 °C to +60 °C
Physical Weight (kg)	5.6
Dimensions L x W x H (cm)	20.9 x 10 x 27.5

Industrial Applications

1. Energy-Efficient HVAC Fan Speed Control

This VFD can be seamlessly integrated into large building management systems to precisely control the speed of HVAC fans. By dynamically adjusting fan output based on demand, it optimizes airflow and significantly reduces energy consumption, leading to improved comfort and operational savings. The embedded BACnet MS/TP communication protocol ensures straightforward integration with existing building automation infrastructure.

Problem Solved

Traditional HVAC systems often operate fans at constant, maximum speeds, resulting in substantial energy waste and suboptimal climate regulation. This VFD addresses this by enabling variable speed control, matching fan operation to the exact airflow requirements.

BACnet MS/TPVariable Frequency DriveHVACFan ControlEnergy Efficiency4.00 kW

2. Automated Pump Control for Water/Wastewater Treatment

The 6SL3220-1YD20-0UB0 drive's 4.00 kW power rating and specialized functions, such as deragging mode, pipe filling mode, and multi-pump control, make it an ideal solution for optimizing pump management in water and wastewater treatment plants. Its IP20 rating ensures safe installation within protective control cabinets in industrial environments.

Problem Solved

Pumping operations frequently encounter challenges like pump clogging, damaging water hammer effects, and inefficient coordination in multi-pump setups. This drive's integrated functionalities enhance pump performance, prolong equipment lifespan, and minimize maintenance requirements by proactively addressing these issues.

Pump ControlWater TreatmentWastewaterDeragging ModeMulti-pump Control4.00 kWIP20

3. Demand-Driven Air Compressor Motor Control

For industrial compressed air systems, this 4.00 kW variable frequency drive offers dynamic adjustment of compressor motor speeds to precisely match fluctuating air demand. This capability prevents wasteful idling or frequent on/off cycling, thereby maintaining stable system pressure. Its robust construction and wide operating temperature range (-20 °C to +60 °C) ensure reliable performance in demanding industrial settings.

Problem Solved

Fixed-speed air compressors often consume excess energy by running at full capacity regardless of demand or by undergoing frequent start-stop cycles. This VFD mitigates these inefficiencies by allowing the compressor to deliver only the necessary air volume, significantly reducing energy costs and mechanical wear.

Compressor ControlVariable Speed DriveEnergy SavingsIndustrial Automation4.00 kW-20 °C to +60 °C