The SPM Inverter Modules series is a family of Bosch Rexroth Indramat spindle amplifier modules for the SERVODYN-T drive platform.
The series uses a modular DC bus drive concept and includes multiple output classes so the spindle section can be matched to the power requirements of the machine. These modules are intended for spindle-drive applications in CNC and industrial motion systems rather than as stand-alone general-purpose inverters. The SPM units are used as part of a larger modular drive assembly with the required supply and companion drive hardware. Overall, the series is designed for modular spindle-drive configurations where the inverter section is selected according to the required current capacity.