Lenze frequency inverter i550

Lenze frequency inverter i550 : The high-performance drive solution for complex industrial plants

Are you looking for a frequency converter that integrates seamlessly into your machine whilst reducing your storage and operating costs? The Lenze i550 combines outstanding Ethernet connectivity with an intelligent modular system – offering exceptional energy efficiency and easy installation. Configure your drive precisely to your specific requirements – with the proven quality from the renowned manufacturer Lenze. Ideal for both new and retrofit projects in modern industry.

On this page, select the appropriate components, specify the required quantity and simply add each item to your basket.
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Lenze frequency inverter i550

Lenze i550 drive series, available as a complete unit or in a modular configuration

  • i550 Complete: Power unit and control unit in a single device

  • i550 Modular:  Power supply unit and various control units to be purchased separately

  • Applications: Conveyor, travel and winding drives, pumps and fans, and many other machine applications

  • Compact size: just 130 mm deep up to 11 kW

  • complies with the efficiency requirements of standard EN 50598-2 and IEC 61800-9-2

  • Vector control or U/f characteristic curve control, optionally with feedback

  • Dynamic braking via a braking resistor

  • Interfaces: CANopen, EtherCAT, EtherNet/IP, Modbus RTU, Modbus TCP, PROFIBUS, PROFINET, POWERLINK, IO-Link

  • Safe Torque Off (STO) as an accessory

  • EASY Starter diagnostic software (free)


i550 230V complete frequency inverter

If you need a ready-to-use drive solution for 230 VAC networks, the fully pre-assembled i550 230V frequency inverter is the right choice. This version combines the power section and control unit in a compact device and generates a three-phase 230 VAC supply from a single-phase input (ideal for standard asynchronous motors in delta connection). Perfect for decentralised systems, smaller conveyor belts or machines in environments without a three-phase industrial supply.

i550 400V complete frequency inverter

For traditional industrial plant engineering with a three-phase 400 VAC mains supply, the i550 400V offers maximum efficiency as a complete unit. This set, comprising a power unit and a control unit, is perfectly matched at the factory and covers a wide power range for demanding applications – from extruders to large industrial fans. By ordering as a complete unit, you can speed up your procurement process and reduce installation effort.

i550 230V Power Unit

The modular design allows you to achieve maximum flexibility in control cabinet design. The i550 230V Power Unit is the pure power section for single-phase AC networks. It handles the robust conversion of energy, but leaves communication to the separately selectable Control Unit. This means you install the same 230V power section as standard and only add the fieldbus-specific intelligence flexibly in the final step.

i550 400V Power Unit

Die i550 400V Power-Unit ist die robuste Basis für hochkomplexe, skalierbare Antriebslösungen im industriellen 400-V-Netz. Sie liefert die Energie für Schwerlastanwendungen von 0,25 kW bis zu 132 kW. Ihr geschäftlicher Nutzen: Halten Sie lediglich die mechanischen Power-Units vor und stecken Sie die benötigte Kommunikations-Intelligenz erst kurz vor der Inbetriebnahme auf. So senken Sie Ihre Lagerkosten um ein Vielfaches und bleiben bei kurzfristigen Projektänderungen stets flexibel.

i550 Control Unit

The i550 Control Unit is the intelligent heart of your frequency converter. It slots onto the Power Unit without the need for tools and defines the system’s functionality. This is where you select the network connection (e.g. PROFINET, Modbus TCP, IO-Link). It also houses all the extended digital and analogue inputs and outputs. Furthermore, the drive can be equipped with a hardware module for safety technology. The module is mounted on the drive and provides the STO (Safe Torque Off) safety function.

i550 Accessories

To optimise installation and long-term maintenance, the i550 Accessories category offers perfectly tailored add-ons. For smart diagnostics, choose the plug-in Wi-Fi module. For environments with strict IT security policies, the diagnostic keypad is available. You will also find high-performance external braking resistors here, which are required to safely implement dynamic deceleration in travel and lifting drives. This category also includes line chokes, which reduce the effective current and thus significantly lower the operating costs of the inverter or significantly shorten the payback period of the investment.

i550 frequency innverter: Scalable design for maximum performance

With an impressive power range from 0.25 kW up to 132 kW, the Lenze i550 covers an enormous spectrum. For optimum motor control, the unit offers both high-precision vector control and classic V/f curve control – with optional feedback (encoder evaluation) depending on requirements.
The drive meets the strict efficiency requirements of the Ecodesign Directive and the established standard EN IEC 61800-9-2. This helps to reduce the operating costs of your machine in the long term. Thanks to the precise control, only the exact amount of energy required for the current process step is consumed.

Communication without limits: a wide range of interfaces on board

In modern factories, the interconnection of all components is standard practice. The i550 supports an unrivalled range of interfaces for highly dynamic real-time performance: CANopen, EtherCAT, EtherNet/IP, Modbus RTU, Modbus TCP, PROFIBUS, PROFINET and POWERLINK.

In addition, integration via the IO-Link port offers significant cost benefits for peripherals. This smart standard drastically reduces cabling requirements and enables simple parameter transfer and diagnostics, whilst the Ethernet-based fieldbuses are also available for the time-critical performance of the main plant.

Maximum security thanks to integrated STO

Safety is non-negotiable in modern industry. The Lenze i550 offers the essential STO (Safe Torque Off) function directly within the hardware of the relevant control units. STO ensures that the motor is switched off with zero torque, preventing unexpected start-up without the need to physically disconnect the drive from the mains supply. This functionality is certified to SIL 3 (Safety Integrity Level 3).

A wide range of applications: conveyor, travel and winding drives

Thanks to its overload capacity and precise control, the Lenze i550 is the perfect choice for:

  • Pumps and fans: Optimised performance curves for maximum energy savings.

  • Conveyor drives and travel drives: Smooth acceleration curves and precise positioning.

  • Lifting drives and winding drives: Constant traction and secure load holding. For highly dynamic braking processes, the inverter supports external braking resistors. A particular highlight for decentralised systems: the motec version features an integrated energy recovery module, which in many cases eliminates the need for external resistors and further increases system efficiency.

  • Extruders and packaging machines: High performance for complex processes.

Thanks to the built-in motor temperature monitoring, the drive is also protected against thermal overload at all times.

Compact size and IP66 protection rating

Requirements vary depending on the application. For standard control cabinet installation, the unit stands out thanks to its extremely compact design (only 130 mm deep up to 11 kW). If you require a decentralised solution, the i550-protec or motec versions are ideal. These offer a high protection rating of up to IP66, making them resistant to dust and water jets. Wall mounting directly at the process is easily possible.

Easy commissioning: EASY Starter diagnostic software

Time is money – this is particularly true during commissioning. Lenze provides the powerful EASY Starter diagnostic software free of charge for configuration. In addition, technicians can access all parameters wirelessly via a smartphone app using an optional Wi-Fi module. Alternatively, depending on the device model (Cabinet or motec), interfaces such as Micro-USB or USB-C are available. A plug-in keypad also allows values to be adjusted directly on the drive.

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FAQ – Frequently asked questions about the Lenze i550

1. What are the key requirements that the i550 frequency converter meets?

The i550 frequency converter meets the most demanding requirements for communication (EtherCAT, PROFINET, IO-Link) and safety in automation technology. Its power range extends from 0.25 kW to 132 kW.

2. What does STO mean in the context of the i550 frequency converter?

STO (Safe Torque Off) is a safety function that is permanently integrated into selected control units. It safely cuts off the motor torque without electrically isolating the drive from the mains. This prevents unexpected restarting (certified to SIL 3).

3. Does the inverter have interfaces such as Micro-USB or USB-C?

Yes, depending on the model chosen (control cabinet or motec), the device is equipped with Micro-USB or USB-C ports to enable quick diagnostics via a PC.

4. Is the i550 suitable for pumps, fans and stepper motors?

Yes. Thanks to its specialised control algorithms, it is ideal for pumps, fans, conveyor drives, lifting drives and demanding winding drives, as well as for use in packaging machinery.

5. Can I control the frequency converter via an app?

Yes, with an optional Wi-Fi module, you can use a smartphone app to wirelessly read and adjust parameters and carry out a quick diagnosis.