Siemens SINAMICS G120C 0.55kW VFD PROFINET

Technical Overview

Compact SINAMICS G120C VFD for 0.55kW 3AC 380-480V motors, featuring integrated PROFINET/EtherNet/IP, STO, and IP20 protection for cabinet installation.

Key Features

V/f and sensorless vector control for precise motor regulation.
Integrated PROFINET and EtherNet/IP communication for seamless network integration.
Safe Torque Off (STO) integrated for enhanced machinery safety.
IP20 / UL open type protection, suitable for control-cabinet mounting.
Compact footprint, optimized for general machine building applications.
Unfiltered design with robust external 24 V I/O interface: 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output.
Motor temperature sensor input (PTC/KTY) for monitoring.
Compliance with international standards including CE, cUL, UL, KC, EAC, C-Tick (RCM).

Technical Specification Matrix

Parameter	Value
Input Supply Voltage	380-480 V 3 AC (+10% / -20%)
Input Line Frequency	47-63 Hz
Rated Power (Low Overload LO)	0.55 kW / 0.75 hp
Rated Power (High Overload HO)	0.37 kW / 0.50 hp
Rated Output Current (LO)	1.70 A
Rated Output Current (HO)	1.30 A
Max. Output Current	2.60 A
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Pulse Frequency	4 kHz
Overload Capability (LO)	150% base load current for 3s, then 110% for 57s (300s cycle)
Overload Capability (HO)	200% base load current for 3s, then 150% for 57s (300s cycle)
Degree of Protection	IP20 / UL open type
Communication Interfaces	PROFINET, EtherNet/IP
Digital Inputs (Standard)	6
Digital Inputs (Fail-safe)	1
Digital Outputs (Relay)	1 (DC 30V, 0.5A)
Digital Outputs (Transistor)	1 (DC 30V, 0.5A)
Analog / Digital Inputs	1 (Differential input, 10-bit resolution)
Analog Outputs	1 (Non-isolated output)
Motor Temperature Sensor Input	1 (PTC, KTY compatible)
Physical Weight (kg)	1.2
Dimensions L x W x H (cm)	22.5 x 27 x 8.5

Industrial Applications

1. Conveyor System Speed Control

Precisely controls the speed of a 0.55 kW conveyor motor in a 380-480V 3AC industrial manufacturing environment. The integrated PROFINET communication allows seamless integration into existing plant networks for centralized control and monitoring.

Problem Solved

Enables accurate speed regulation for varying production demands, reducing mechanical wear and tear, and providing critical Safe Torque Off (STO) functionality for operator safety during maintenance or emergencies.

Variable Frequency DrivePROFINETSafe Torque Off0.55 kW380-480VSpeed ControlConveyor Systems

2. HVAC Pump Optimization

Manages a 0.55 kW pump motor within a 380-480V 3AC commercial HVAC system, optimizing fluid flow and pressure based on real-time building demand. Its IP20 rating ensures suitability for installation within a protected control cabinet.

Problem Solved

Achieves significant energy savings by operating pumps at optimal, demand-driven speeds rather than constant full speed, reduces water hammer effects, and offers critical safety shutdown through STO, thereby extending pump lifespan.

VFD0.55 kW380-480VIP20Energy EfficiencyPump ControlHVAC SystemsSafe Torque Off

3. Food Processing Mixer Regulation

Provides accurate speed control for a 0.37 kW (high overload) or 0.55 kW (low overload) mixer motor in a 380-480V 3AC food processing facility, ensuring consistent product quality and process efficiency. The multiple digital inputs can be configured for functions like start/stop, direction, and emergency stops.

Problem Solved

Delivers precise control over mixing processes, which is crucial for product consistency, and supports safe operation with integrated STO. The VFD's ability to handle high overload conditions (200% for 3s) is particularly beneficial for starting and mixing viscous materials.

Variable Frequency Drive0.37 kW0.55 kW380-480VSensorless Vector ControlMixer ControlFood ProcessingSafe Torque Off