DKC21.3-100-7-FW

DKC21.3-100-7-FW is a Bosch Rexroth Indramat EcoDrive unit in the DKC Drive Controllers series. It uses design version 3 and interface option 21, which provides the option-21 connection arrangement for external control integration. The controller has a rated current of 100 A, a maximum input current of 40 A, and a peak current of 100 A. At a 4 kHz switching frequency, it supplies 40 A continuously. Its maximum output frequency at 8 kHz is 800 Hz, and the nominal DC-bus voltage is 700 V.

Device power dissipation is 420 W, including 420 W of dissipation at continuous current. The soft-start circuit uses a 24 Ω resistor rated at 0.5 kW to limit inrush current during startup. A 6 Ω ZKS brake resistor dissipates regenerative energy during motor deceleration.

The controller operates at ambient temperatures from +5ºC to +45ºC, with a separate maximum ambient-temperature rating of 45ºC. It supports relative humidity up to 95% and absolute humidity up to 25 g/m³. The maximum installation altitude is 1,000 m. Its IP20 enclosure protects against contact with internal components and solid objects larger than 12.5 mm but does not provide water protection. The unit withstands a 15 g half-sine shock lasting 11 ms and weighs 4.5 kg.