Rexroth DKC013-100-7-FW

Mains input: three-phase 380 to 480 VAC, 50/60 Hz

DC-bus nominal voltage: 700 VDC

Rated continuous current: 100 A

Control voltage: 24 VDC logic and option-card supply

Switching frequency: 4 kHz or 8 kHz selectable

Maximum output frequency: 400 Hz at 4 kHz switching and 800 Hz at 8 kHz switching

DC-bus capacitance: 0.675 mF

Soft-start resistor: 24 ohm, 0.5 kW

Integrated bleeder: 0.5 kW continuous, 120 kW peak for 0.25 s within 60 s cycles

Bleeder energy capacity: 31 kJ total dynamic energy absorption

Dynamic brake ZKS resistor: 6 ohm

Power dissipation: 420 W under continuous rated load

Dimensions: 360 mm height, 105 mm width, 261 mm depth

Weight: 4.4 kg

Protection rating: IP20 for control-cabinet installation

Cooling: internal forced-air blower

Operating temperature: 0 to 45 °C at full nominal data

Storage temperature: minus 25 to plus 70 °C

Installation altitude: up to 1000 m at full rated data

Feedback support: resolver, EnDat, Hiperface and incremental TTL encoder according to installed card

Communication: SERCOS II, RS232, RS485, analog interface, parallel interface and optional fieldbus cards according to firmware and slot configuration

Firmware: field-replaceable FW module; FGP, SFP and SMT function sets are available for machine-tool and general automation builds

Compatible motors: Rexroth MKD and MHD servo motors with matching feedback and current rating

100 A continuous output supports large inertial loads, high-acceleration axes and heavy machining feeds.

Field-oriented control provides torque, speed and position regulation in one firmware platform.

SERCOS II and optional bus cards enable deterministic multi-axis coordination.

Universal feedback interface operates resolver, EnDat, Hiperface and incremental encoders without hardware replacement when the correct card is installed.

Integrated bleeder and ZKS brake circuit manage deceleration energy and prevent DC-bus overvoltage.

Modular firmware module allows function-set changes for different machine automation requirements.

CNC machining centers, heavy-duty milling and turning axes, metal-forming presses, plastic injection and blow-molding machines, printing presses, converting lines, test benches, robotic cells, material-handling systems and multi-axis synchronized production machinery.

Continuous current delivery at 100 A sustains rated motor torque without external current amplifiers.

700 VDC bus supports fast current-loop response and high dynamic acceleration.

Switching at 8 kHz reduces motor acoustic noise and torque ripple for finishing operations.

SERCOS II cycle performance provides synchronized interpolation for multi-axis contouring.

Bleeder and brake-resistor data define permissible regenerative energy for repeated decelerations; oversized regeneration requires an external resistor sized from the duty cycle.

Enclosure uses coated steel or aluminum alloy with cabinet-grade insulation.

Power section contains IGBT inverter modules, rectifier bridge, DC-link capacitors, bleeder resistors, soft-start resistor and current sensors.

Control section contains industrial PCBs, microprocessor, EEPROM, encoder interface circuits and communication transceivers.

Cooling section contains an insulated axial blower, airflow ducts and IP20 protective vents.

Feedback and bus connectors use gold- or tin-plated industrial contact elements with shielded cable interfaces.

The unit consists of a three-phase rectifier stage, DC intermediate circuit with capacitors and bleeder, IGBT inverter stage, control processor board, feedback interface board, communication option slot, firmware module socket and blower assembly. All power terminals, DC-bus connections and signal connectors are arranged for vertical panel installation with separated high-voltage and low-voltage routing.

The rectifier converts three-phase mains to 700 VDC on the intermediate circuit. The control processor receives position, speed or torque commands from SERCOS, analog, parallel or serial interfaces and reads motor feedback from the resolver, EnDat, Hiperface or incremental encoder. The digital current controller computes the required stator currents and drives the IGBT inverter with PWM output. The closed loop continuously corrects current, velocity and position errors. Regenerative energy is absorbed by the bleeder and ZKS brake circuit to maintain DC-bus voltage within limits.

Mount vertically in a grounded control cabinet with specified top and bottom blower clearance.

Supply three-phase 380 to 480 VAC through properly sized breakers, contactors and mains filters.

Connect 24 VDC control voltage to the logic interface before applying power-stage voltage.

Use DC-bus cables and motor cables with cross-sections specified by the Rexroth selection manual.

Install encoder, resolver and SERCOS cables with continuous shielding and separate trays from power cables.

Insert the correct firmware module and configure communication address, feedback type and motor parameters before first run.

Allow the DC-bus capacitors to discharge fully according to the safety interval before any terminal work.

Confirm the exact suffix DKC01.3-100-7-FW, firmware variant, feedback card and motor compatibility before replacement.

Apply only 380 to 480 VAC three-phase mains and 24 VDC control voltage.

Do not operate beyond 100 A continuous rating without verifying thermal derating and cabinet cooling.

Verify motor insulation, shaft load, encoder alignment and brake function before energization.

Restore validated parameters and firmware backup after replacement; mismatched firmware causes communication and motion faults.