Product Description:

The DKR05.2-W500N-BE12-01-NNSN-FW is a digital intelligent AC drive controller manufactured by Bosch Rexroth Indramat for the DKR Drive Controllers series. It converts DC bus energy into controlled three-phase output to govern large servo and induction motors in automated machining centers, presses, and material-handling equipment. By integrating power electronics and motion logic in one frame, the unit serves as the primary interface between a higher-level PLC and the electromechanical axes it drives. It supports closed-loop control of high-power axes that must respond consistently during speed changes, positioning moves, and repeated production cycles.

At a nominal output of 500 A, the controller can deliver up to 165 kW of mechanical power to the connected motor from a 400 V supply, while internal losses are limited to 6.2 kW, which affects enclosure heating and airflow requirements. Cooling is provided by air cooling with a built-in blower, eliminating the need for external chillers. Real-time motion commands arrive via the SERCOS interface, and position feedback is processed through digital servo and resolver feedback channels. This combination allows the controller to regulate commanded motion and returned motor signals without separate interface modules. The pebble gray housing matches common cabinet colors, and its front latch accepts a 7 mm three-square socket wrench for secure locking. A door-mounted main switch disconnects power during service.

Energy returning from decelerating loads is routed to a rigid DC bus without a brake chopper, so excess regeneration must be absorbed by the plant distribution network. The drive belongs to Line 05 and carries design version 2 with function module version 01 for its internal circuit revision. Its mass of 550 kg requires a rigid mounting surface and enough clearance for handling during installation. The cabinet layout must also leave room for the incoming supply, motor leads, and DC bus connections used by a controller of this size.