Product Description:

The DKR02.1-W200N-BT26-01-FW is a digital intelligent AC drive controller produced by Bosch Rexroth Indramat within the DKR Drive Controllers series. It is intended to regulate and protect high-power servo motors in machining centers, presses, and other automated cells. By modulating bus voltage and phase current, the unit supplies precise torque and speed commands to connected motors, forming the central power element between the plant’s motion control system and the electromechanical axis.

Communication with the supervisory CNC or PLC occurs through the SERCOS interface, which provides deterministic fiber-optic data exchange for setpoints and diagnostics. At a 4 kHz switching frequency, the drive can deliver a continuous current of 120 A, translating to a sustained mechanical output near 47 kW when paired with compatible motors. Internal control electronics are powered by an AC 230 V auxiliary supply that tolerates ±10% variation, while the power section uses a built-in air blower to force air through the heat sink assembly. The controller operates with a rigid DC bus and no brake chopper, so external braking resistors are not wired into the bleeder circuit. Digital servo and resolver feedback channels are interpreted concurrently to close the current and velocity loops in real time.

Peak demand is handled by a current reserve of 141 A, enabling short acceleration bursts without loss of control accuracy. The main power stage accepts a three-phase supply of 3 x AC 400–480 V with ±10% tolerance, and at maximum load the assembly dissipates 1600 W of heat that must be extracted by cabinet ventilation. The housing and blower package weigh 104 kg, so panel mounting requires adequate structural support. Additional identification data include a current rating of 200 A, line series 02, design version 1, and function module version 01.