Rexroth DKCXX3-100-7

Technical Specifications:​

Rated continuous output current 100 A. Peak output current 200 A for short overload periods. DC bus nominal voltage 700 V DC. Main supply 3-phase 380 to 480 V AC, 50/60 Hz for standard 100 A builds, wider 200 to 480 V AC according to interface version. Control supply 24 V DC. Continuous power dissipation approximately 420 W. Soft-start resistor 24 ohm. Brake output maximum 40 V DC, 2 A. Maximum output voltage 800 V DC. Maximum output frequency 1000 Hz. Short-circuit current rating 42,000 A rms. Protection class IP20. Operating temperature 0 to 45 C rated, up to 55 C derated. Device height 360 mm, depth 261 mm, width according to interface build, approximately 105 mm for standard high-current booksize. Weight approximately 9.7 to 12 kg according to chassis and interface.

Functional Features:​

Communication and control functions depend on XX code and may include SERCOS, PROFIBUS, analog positioning or digital I/O. Selectable rotary field direction, holding brake control, stored positioning functions according to firmware, DC bus energy management, diagnostic serial interface.

Structure And Materials:​

Rigid metal drive enclosure, high-current IGBT modules, large DC bus capacitor bank, soft-start circuit, brake control stage, internal or external cooling as defined by cabinet design, communication module bay, power terminals and feedback connectors.

Working Principle:​

Mains input is rectified to the 700 V DC bus. The soft-start resistor limits inrush current. The output IGBT bridge creates PWM motor voltage under closed-loop control. Feedback and fieldbus data regulate current, speed and position. Brake and rotary-field parameters are configured for the connected motor.

Installation Requirements:​

Mount in a ventilated control cabinet with vertical orientation. Provide busbar or cable sizing for 100 A continuous output and 200 A peak. Connect 24 V control, motor power, encoder or resolver feedback, brake circuit and the designated communication network. Verify XX interface module before wiring.

Application Scenarios:​

Large CNC machines, multi-axis production lines, printing presses, heavy material handling, test rigs and high-inertia servo systems.

Usage Precautions:​

Confirm the XX interface code and firmware before commissioning. Use only the specified 24 ohm soft-start resistor. Do not operate beyond 45 C without manufacturer derating. Ensure brake load does not exceed 40 V DC and 2 A. Keep the DC bus discharged before maintenance.