Ensuring the suitability of the SK 200E series distributed frequency inverter for all communication requirements and for every application, Nord Drivesystems continuously expands its range of fieldbus and Ethernet interface options for these units. In addition to fieldbus interfaces for CANopen, DeviceNet, and Profibus, the supplier offers gateways for connecting the inverters to PROFINET and EtherCAT networks. Interfaces for other Industrial Ethernet standards are in development. The next to come are POWERLINK and EtherNet/IP with an interface for the PROFIsafe safety protocol also under way. The fieldbus communication interfaces are available as external bus technology units - optionally with or without additional I/Os - for straightforward and flexible mounting either directly on the inverter or separately on the machine frame or other equipment. Alternatively, they are available as internal modules that extend the integrated functional range without altering the dimensions of the inverter. Due to the integrated proprietary system bus, up to four frequency inverters can be connected to the higher level bus system via a single technology unit. The system bus tunnels the parameter data, making all the participants' data sets available at every RS232 interface on the connected inverters and the technology unit.