MDxxxx | Drive modules

Compact multiaxis systems for drives of all kinds

With the MD module series, the MX-System systematically capitalizes on a DC link system for all axis modules. For the control of synchronous servomotors and three-phase asynchronous motors, the MD8xxx and MD3xxx provide modules that are optimized for the respective task. The MD6xxx modules are available for generating the DC link voltage. These take the 3-phase primary voltage from the backplane and feed the DC link voltage into the system. The MD6xxx modules ensure EMC category C2 in combination with the MS1xxx mains supply modules. In the simplest version, the modules have a connection for an external braking resistor. Further variants cover the requirements of a controlled DC link as well as a mains regeneration. Another feature of the MD6xxx modules is the possibility to directly connect the decentralized servo axis system AMP8000. With the MS3xxx and MS4xxx system modules, the DC link voltage can be passed on to other MX-System stations.In addition, the energy supplied is used in the best possible way: regenerative energy from deceleration processes is stored in the system’s common DC link and is available again for subsequent acceleration processes. Optionally, the capacity of the DC link can be expanded using the MD9xxx capacitor module: This leads to a reduction in the required connected load.

Both the servo drives of the MD8xxx series and the frequency inverters of the MD3xxx series are available in single- and dual-axis versions. The central DC link system and the use of power semiconductors with optimized power dissipation reduce the space required and ensure a high power density. The MD8xxx series servo drives in the MX-System support Beckhoff’s OCT One Cable Technology, with which only one connection cable is required for motor current and encoder feedback. All necessary information for control is transmitted interference-free and reliably by means of a digital interface. The 1-axis servo drives and frequency inverters can optionally be equipped with interfaces for different encoder systems.

Both axis module variants feature STO/ SS1 shutdown by an integrated TwinSafe safety module as standard. The servo drives also offer the “Safe Motion” option.