The NORDAC® PRO is a variable frequency drive for all drive applications. Even in the basic SK 500P version, the NORDAC® PRO provides great versatility. The advanced SK 530P version extends this scope and can be functionally extended with optional SK CU5 modules. The SK 550P has an integrated multi-protocol Ethernet interface for efficient connection to Ethernet-based control systems. Easy operation of the NORDAC® PRO is achieved with a Bluetooth interface, an SD memory card as the parameter storage medium, firmware and operating data, as well as a USB interface which enables parameterization of the voltage-free variable drive “in the box”. Use of the latest components enables a very compact design and therefore space-saving installation.