Distributed frequency inverters deliver precision and dynamics
Distributed automation applications place great demands on drive systems. Comprising several performance-graded models and various functional upgrade options, NORD’s SK 200E
frequency inverter
series enables users to select tailor-made solutions for each specific requirement. Models of sizes 1 to 4 cover performances between 0.25 and 22 kW. The modular series enables the economic implementation of distributed applications ranging from simple start-stop control functions to complex positioning tasks. Upgrade options include external brake resistors and a separate 24 V power supply for stand-alone control voltage regulation. In addition to fieldbus interfaces for CANopen, DeviceNet, and Profibus there are also gateways for integration into PROFINET and EtherCAT networks. Interfaces for further industrial Ethernet standards are currently being developed. The fieldbus communication interfaces are available as external bus technology units with or without additional I/Os, which can be mounted directly on the inverter or separately on the machine frame or nearby equipment.
SYMACH palletizing machines use the POSICON function, a standard feature of all SK 200E frequency inverters, which enables highly dynamic positioning functions with a maximum precision of approximately 1/100 of a rotation of the motor. The new and very compact NORD MG encoder system is used to detect position and orientation. The distributed inverter enables considerable simplification of installation and wiring. The drive manufacturer supplies the ready-wired motor, brake resistor, and motor holding brake. SYMACH uses machine-integrated SK 215E inverters with the additional “Safe Stop” function, which ensures the necessary personnel safety. Further features of the versatile SK 215E units are used in the palletizing machines: sensors and actuators are simply connected to the inverter I/Os with information sent to and from the control unit via CANopen communication. This also reduces the number of cables which need to be wired.