Nordac Pro SK 500P: The latest generation of control cabinet inverters

The Nordac Pro SK 500P frequency inverters from Nord Drivesystems are equipped with an integrated multi-protocol Ethernet interface, a multi-encoder interface for multiple axis operation and a USB interface for voltage-free parameterisation which can provide high levels of connectivity, functionality and modularity.

Nordac Pro SK 500P is the new generation of control cabinet inverters. The series is equipped with an integrated universal Ethernet interface that enables the use of the major real-time Ethernet standards via one single interface. Whether for Profinet, EtherNet/IP, Powerlink or EtherCAT, the required protocol can be easily set by means of parameters. 

The new control cabinet inverters cover rated motor powers from 0.25 to 5.5 kW and feature high levels of connectivity, functionality and versatility. Various device versions can be allocated to various application requirements. Plug-in control, safety and option modules ensure flexibility and the compact book-size design format enables space-saving installation in control cabinets. 

The nature of the modular series is shown by its modern connectivity such as the use of an SD memory card as a storage medium for parameters, as well as a USB interface which enables “in the box” parameterisation of the inverter when the power is switched off. It also provides a CANopen interface, five or six digital and two analogue inputs, two digital and one analogue output, two potential-free multi-function relays, an HTL / TTL incremental encoder interface as well as a universal encoder interface which enables connection of SIN/COS, BiSS SSI, Hiperface and EnDat encoders. 

One Nordac Pro SK 550P highlight is the integrated multi-chip for Industrial Ethernet that enables the use of the real-time Ethernet standards via a single interface.

The SK 550P can read out up to four encoder systems simultaneously and can therefore control several motors in positioning mode. Boasting features such as the integrated PLC for motor- related motion and logic control, a 200% overload reserve for perfect torque and speed performance as well as sensorless current vector control for asynchronous and synchronous motors (open loop and closed loop). The integrated brake chopper for 4-quadrant operation is a part of the basic equipment for the entire series, as is motor brake management, which is important, e.g. for lifting gear applications. NORD supplies the inverters with integrated STO and SS1. 

The integrated PLC processes the data from sensors and actuators and can autonomously initiate control sequences, as well as communicating drive and application data to a control centre, networked components or to cloud storage. This allows continuous condition monitoring and therefore forms the basis for predictive maintenance concepts as well as optimum plant dimensioning. 

With the Nordac Pro SK 550P, the Nord Drivesystems range includes future-proof and user-friendly frequency inverters for control cabinets. The overall concept has been revised, so that the inverter series provides a new platform which promises many years of power and performance from Nord. The new series is of course downwardly compatible with the current SK 500E series. 

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