Synchronous servo motor, with flange size 50., S: Short motor length., /BK: Includes a holding brake., /OF: MOVILINK DDI digital interface., /PK: Built-in PTC or PT1000 type temperature sensor, for thermal protection of the motor., /AZ2Z: Integrated multiturn encoder with MOVILINK DDI interface., /SD1: The cable entry is made by means of plug connectors (swivel angle connector) for hybrid power and signal cables.