Product Description:

The KDV 4.1-30-3/S100 belongs to the KDV Supply Modules series produced by Bosch Rexroth Indramat. As a supply module, it furnishes regulated DC power and auxiliary voltages to multiple drive controllers in an automation cabinet, linking the mains to the shared DC bus and providing controlled energy dissipation through an internal bleeder stage. Its role is to maintain bus stability, return regenerative energy, and distribute +24 Vl, +15 Vm, and -15 Vm control supplies that servo drives and feedback electronics require. This arrangement allows several connected axes to share one central power source instead of using a separate supply for each controller. It also helps keep the control electronics energized while the motion system exchanges energy on the common bus.

The DC link sits at 320 VDC ±10%, allowing drives to draw or return energy while the module stays within its voltage window. When serving a 30 kW load, the mains side draws 77 A, so upstream protection and wiring must be sized accordingly. For rapid acceleration commands, the converter can momentarily pass up to 48 kW of link power, and its energy absorber tolerates up to 100 kWs of regenerated energy before thermal limits are reached. Extra smoothing can be added because the design accepts a maximum bus capacitance of 8 mF, permitting longer motor cables or higher inertia axes without excessive ripple. Separate logic rails supply 2 A on both the +15 Vm and -15 Vm lines, while the +24 Vl rail delivers 11.5 A for I/O and brake relays. A 500 VA auxiliary input keeps these control circuits active even when the main bus is discharged, and peak bleeder power reaches 40 kW during rapid stops.

Cooling air is moved by cabinet fans that each require 70 VA, and installation is permitted up to 1000 m altitude without derating. Internal heat sources account for 150 W of power loss inside the enclosure, while another 500 W is expelled to the surrounding area, so airflow planning is necessary. The 21 kg module mounts vertically to keep its components within temperature limits, and its housing carries an IP10 rating that shields against accidental contact yet relies on the control cabinet for further environmental protection. The vertical mounting position also supports the intended movement of cooling air through the cabinet. This housing is suited for installation inside an enclosed control cabinet rather than for exposed machine mounting.