Product Description:

The KCU02.2N-ET-ET-025-NN-N-NN-NW is a supply and control module produced by Bosch Rexroth Indramat for the KCU IndraDrive Control Systems series. Inside an IndraDrive cabinet, it feeds low-voltage control power to drive inverters, supervises internal bus rails, and furnishes status signals to the higher-level PLC. This product allows multiple servo axes to share a single source of auxiliary energy, which simplifies wiring and supports coordinated shutdown during emergency or service conditions.

The module delivers a continuous output current of 25 A, enough to energize several drive controllers under nominal load. For short transients such as brake release or relay pull-in, it can supply up to 71 A, preventing undervoltage trips during simultaneous axis startup. The stabilized control rail is maintained at 42.0 V, a level compatible with IndraDrive logic circuits while remaining below the 60 V SELV threshold. Its internal power converter is rated for 18.8 kW, so the assembly can support sizable multi-axis installations without additional external supplies. To keep semiconductors within their thermal limits, the unit uses forced air cooling, which draws cabinet air through dedicated channels and expels it at the rear exhaust.

During operation, the converter draws a maximum inrush of 10 A and stores energy in 11 mF of input capacitance supported by two 100 nF housing capacitors, a design that filters line disturbances before they reach sensitive electronics. Protective features are supported by its IP20 enclosure rating, making the unit suitable for closed control cabinets where finger-safe protection is sufficient. With a mass of 3.80 kg, the module is light enough for rail mounting yet heavy enough to act as a heat sink for its 90 W of worst-case dissipation. Bosch Rexroth specifies 110 mm of bottom clearance and 80 mm at the top to maintain airflow and keep the rated 675 W of control output power available without derating.