Product Description:

The DKC11.3-040-7-FW is an EcoDrive controller manufactured by Bosch Rexroth Indramat as part of the DKC Drive Controllers series. It converts incoming three-phase energy to a regulated DC bus and modulates that bus for servo axes, allowing precise speed and torque regulation on factory handling, packaging, and machining lines. Its design version 3 housing encloses power electronics and logic that coordinate with supply and feedback interfaces used throughout modular automation cells.

The power stage can deliver a continuous output of 40 A, which is the maximum motor phase current the device can sustain without thermal derating. Regulation occurs on a DC link that sits at 700 V, giving sufficient voltage headroom for fast torque transients. Pulse-width modulation is generated at up to 800 Hz carrier frequency when the switching clock is 8 kHz, supporting high-resolution velocity control of low-inductance motors. Energy storage on the bus is provided by a 0.27 mF capacitor bank, which stabilizes the link during regenerative events and limits voltage ripple. A built-in soft-start network centered on a 60 Ω resistor limits inrush current so upstream circuit breakers are not tripped when the cabinet is energized.

Total internal losses reach 180 W under nominal load, so cabinet airflow must remove that heat during operation. The front cover carries an IP20 rating, indicating finger-safe access but no protection against liquids, and the housing mass of 5.7 kg simplifies rail mounting without additional support brackets. Operation is permitted at relative humidity up to 95% as long as no condensation forms, with contamination degree 2 and an altitude limit of 2000 m. Continuous bleeder power of 0.15 kW and a 10 kW peak absorber channel excess regenerative energy during abrupt deceleration, which helps prevent overvoltage on the DC link.