Product Description:

The KDV 3.1-100-220-300-200 supply module is produced by Bosch Rexroth Indramat for the KDV Supply Modules series. The unit converts three-phase mains power into a regulated DC bus that feeds multiple drive controllers, forming the power backbone of motion control lines, conveyors, and automated machining centers. By providing stabilized energy and handling regenerative feedback, it allows servo axes to accelerate and decelerate without requiring a separate supply section for each controller. This arrangement also helps keep cabinet wiring compact and makes power distribution across several axes easier to manage.

The internal DC link is regulated at 300 VDC, derived from a nominal supply of 3 x 220 VAC. At rated conditions, the module carries a type current of 100 A, while short acceleration bursts can draw a peak of 160 A for 300 ms without tripping. The input stage can deliver up to 48 kW of feed-in power to connected drives, and a dedicated bleeder resistor path absorbs regenerated energy when the shared bus rises during braking. Separate auxiliary and fan circuits require 500 VA and 1000 VA respectively, so control electronics and cooling remain isolated from the main power path. Cabinet heat is also affected by 150 W of internal loss, which must be removed by the enclosure ventilation system.

During regenerative braking, the shared bus can accept up to 40 kW of instantaneous feedback and can store 100 kWs in its capacitor bank before the bleeder activates. Operation is permitted at ambient temperatures up to 55 °C and at installation altitudes up to 1000 m, while the module mass is 21 kg for cabinet mounting. The housing is rated IP10, so the unit must be installed inside a protected cabinet. Because of that enclosure rating, the module depends on external forced convection within the cabinet rather than on a sealed standalone housing.