Technical Overview

Compact 3-phase 380-480V 0.75kW inverter with IP20, USS/Modbus RTU communication, and Safe Torque Off for efficient motor control.

Key Features

3-phase AC input voltage: 380-480V (+10%/-20%), 47-63 Hz
Rated output power: 0.75 kW (1.00 hp) for Low Overload (LO), 0.55 kW (0.75 hp) for High Overload (HO)
Overload capability: 150% base load current for 3s, followed by 110% for 57s (LO); 200% for 3s, followed by 150% for 57s (HO)
Integrated USS/MODBUS RTU communication protocols
IP20 / UL Open Type protection class
Compact FSAA frame size with dimensions of 173 x 73 x 155 mm (H x W x D)
I/O Interface: 6 standard digital inputs, 1 fail-safe digital input, 2 digital outputs (1 relay, 1 transistor), 1 differential analog input, 1 non-isolated analog output
Unfiltered design
External 24V power supply for I/O
Motor temperature sensor input (PTC/KTY interface)

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
Rated Input Current (LO)	2.90 A
Rated Input Current (HO)	2.50 A
Output Number of Phases	3 AC
Rated Output Voltage	400V IEC, 480V NEC
Rated Output Power (LO)	0.75 kW (1.00 hp)
Rated Output Power (HO)	0.55 kW (0.75 hp)
Rated Output Current (LO)	2.20 A
Rated Output Current (HO)	1.70 A
Maximum Output Current	3.40 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0 ... 240 Hz
Output Frequency (V/f Control)	0 ... 550 Hz
Efficiency η	0.97
Sound Pressure Level (1m)	49 dB
Power Loss	38.6 W
Integrated Filter Class	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)
Motor Temperature Sensor Input	1 (PTC, KTY compatible)
External Power Supply	24 V
Protection Class	IP20 / UL Open Type
Frame Size	FSAA
Physical Weight (kg)	1.1
Dimensions L x W x H (cm)	22.5 x 27 x 8.5

Industrial Applications

1. Conveyor Belt Systems in Manufacturing

This drive precisely controls the speed and torque of motors in manufacturing conveyor systems. The 0.75 kW power is suitable for smaller to medium-sized conveyors, while its robust overload capacity handles temporary load surges during accumulation or startup. The integrated Safe Torque Off (STO) function ensures operator safety by preventing unexpected motor starts.

Problem Solved

Provides precise speed control for varying production rates, ensures reliable operation under transient loads, and offers critical safety interlocking for personnel protection.

Variable speed driveTorque controlOverload protectionSafe Torque Off (STO)USS/Modbus RTUMaterial handling

2. Industrial Pump Control in Water Treatment

The SINAMICS G120C can efficiently operate centrifugal pumps in water treatment plants. The 0.75 kW output power, combined with V/f control up to 550 Hz, allows for fine-tuning of pump flow and pressure, leading to significant energy savings. The analog input can interface with flow or pressure sensors for closed-loop control, optimizing pump performance based on real-time demand.

Problem Solved

Achieves energy optimization through demand-driven pump control, enables precise regulation of fluid flow and pressure, and integrates seamlessly with larger process control systems.

VFDPump controlEnergy efficiencyProcess automationAnalog inputPressure regulationFlow control

3. Small-Scale HVAC Fan Control

This compact inverter is well-suited for controlling fans in small to medium-sized HVAC systems. The 0.75 kW power output is sufficient for typical ventilation fans, and its V/f control mode with a wide output frequency range (0-550 Hz) facilitates variable air volume (VAV) control. This enables fan speed adjustment based on demand, reducing energy consumption and operational noise.

Problem Solved

Provides energy savings in HVAC applications through variable fan speed control, contributes to quieter system operation, and allows for integration with building management systems for automated control.

Variable frequency driveHVACFan controlEnergy savingVAV systemsBuilding management systemCompact design

Siemens SINAMICS G120C VFD, 0.75kW, 380-480V, IP20

Siemens SINAMICS G120C VFD, 0.75kW, 380-480V, IP20

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Conveyor Belt Systems in Manufacturing

2. Industrial Pump Control in Water Treatment

3. Small-Scale HVAC Fan Control