NORD Drivesystems extended its SK 500E series of compact frequency inverters by the addition of the top-of-the line model SK 540E with an integrated basic PLC functionality. Without the support of an external controller, the cost-effective inverter is capable of controlling many demanding applications with sequences and links to counters, comparators and flags that are easily programmed in accordance with the industry standard IEC 61131-3 using the PC-based NordCon tool. The PLC provides control for up to eight digital inputs, three digital outputs, two relays, two analog inputs and one analog output. If required, additional I/O extension modules may be added for an increased machine control. The inverter may be used for such applications as the integration of monitoring functions into pump drives, enabling them to autonomously react to flow rate fluctuations. All operating data can also be transferred to higher-level controls as the inverter features interfaces for all standard fieldbus systems. Even without an integrated PLC, the SK 500E series inverters support a wide range of industrial applications through integrated functions including PID process control, a servo mode that ensures full torque at standstill, and absolute and relative positioning with the POSICON module. They are available in seven sizes and cover motor ratings between 0.25 and 37 kW. The SK 540E will be available for up to 7.5 kW with models from 11 to 37 kW being also under way.
Edited by: Teoman Tugsuz