Product Description:

The DKR04.1-W400N-BA01-01-FW belongs to the DKR Drive Controllers series produced by Bosch Rexroth Indramat. This controller governs high-power servo axes in industrial automation lines. It converts velocity and position commands from a motion coordinator into regulated motor currents so that large mechanical loads can be accelerated, synchronized, and stopped with precision. In heavy-duty axis groups, accurate current control supports repeatable motion during acceleration ramps and coordinated stopping sequences. That makes the unit suitable for machines where stable servo response must be maintained through changing load conditions.

The unit exchanges setpoints with the host PLC through an analog interface, which supports continuous-value speed or torque references. This approach fits control schemes that send a variable command signal rather than networked setpoint data. Internal components are cooled by a built-in air blower, and the fan directs airflow across heat-generating semiconductors so the drive can sustain rated currents without external ducting. Motor transducers are accepted through digital servo and resolver feedback, allowing either high-resolution electronic commutation or resolver-based tracking from the same connector set. The combined feedback options let the controller work with different motor transducer types while preserving closed-loop control performance. The power section has no bleeder and a rigid DC bus. Excess regenerative energy must be handled by upstream devices because the unit does not include a brake chopper.

The hardware is design version 1. The controller uses function code 01 for its primary feature set and line 04 for its frame grouping. These identifiers help match the drive with the correct documentation, option modules, and connection hardware. Clear identification is useful in multi-axis cabinets where several drives may share a similar front layout. It also helps ensure that attached accessories are selected to fit the controller layout and control method.