Product Description:

The DKR04.1-W400N-BT01-01-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat and supplied within the DKR Drive Controllers series. In an automation cell, this unit forms the power and control link between the plant's three-phase mains and multiple servo axes. It delivers regulated current and processes real-time feedback so connected motors can follow programmed velocity and torque profiles. This arrangement suits coordinated motion tasks in large industrial machinery where several axes must respond with consistent timing.

At a switching frequency of 4 kHz, the drive can supply a continuous output of 210 A, translating into roughly 93 kW of mechanical power when paired with appropriate motors. Its power section accepts a mains range of 3×AC 400–480 V (±10%) and can deliver transient bursts up to 282 A for rapid acceleration. Thermal design limits total losses to 2500 W, allowing ventilation or heat-exchanger capacity to be sized accurately. This output level supports large servo axes that require sustained torque during demanding duty cycles. The controller is part of Line 04 and is built as design version 1 with function module 01 and version 01. Digital servo and resolver feedback are processed internally to close position and velocity loops with sub-millisecond latency.

Auxiliary electronics run from a AC 230 V control supply that tolerates ±10% variation, and the power circuitry is cooled by a built-in air blower so no external liquid circuit is needed. The separate control supply supports the command electronics without drawing from the main output stage. Motion commands and diagnostics are exchanged through a SERCOS interface, enabling deterministic fiber-optic networking with other drives and PLCs. Installation weight is kept to 150 kg, which supports direct mounting in large machine frames without additional suspension. A rigid DC bus without a brake chopper is used, so regenerative loads require external dynamic-braking hardware.