Description
Rexroth DKCXX.3-040-7
Technical Specifications:
- Input Power: 3-phase 380V to 480V AC, ±10%, 50/60Hz
- Rated Continuous Output Current: 40A
- Nominal DC Bus Voltage: 700V DC
- Control Power Supply: 24V DC
- Maximum Output Frequency: 1000Hz
- Cooling Method: Built-in forced air cooling fan
- Protection Grade: IP20
- Dimensions: 65mm width × 360mm height × 261mm depth
- Operating Ambient Temperature: 0°C to +45°C; derated operation up to 55°C
- Storage Temperature: -20°C to +70°C
- Communication Interfaces: SERCOS optical fiber bus, optional Profibus-DP
- Power Dissipation: 180W continuous power loss
Function Features:
- Full digital closed-loop control for position, speed and torque three control modes
- Support multiple encoder feedback protocols including resolver, incremental encoder and absolute encoder
- Integrated brake chopper for handling regenerative energy from motor deceleration
- Built-in comprehensive protection functions: overcurrent, overvoltage, undervoltage, overtemperature, motor overload and encoder fault protection
- High dynamic response for fast positioning and high-speed contour machining
- Internal fault diagnosis and status recording for troubleshooting
- Parameter storage and backup function for quick commissioning recovery
- SERCOS optical bus realizes high-speed real-time communication with upper CNC controller
Application Scenarios:
- CNC machining centers, lathes and grinding machines
- Automated material handling and palletizing systems
- Industrial robot joint drive units
- Printing and packaging machinery
- Retrofit and spare part replacement for old Indramat servo systems
Material Composition:
- Main Housing: Cold rolled steel sheet with black powder coating
- Internal PCB: Multilayer FR4 fiberglass printed circuit board with lead-free soldering
- Power Devices: IGBT power modules, high-speed rectifiers and snubber components
- Control Core: Industrial digital signal processor, high precision ADC sampling chips
- Terminals: Tin-plated copper alloy screw terminals for power and signal wiring
- Optical Interface: Fiber optic transceiver modules for SERCOS bus
Structural Features:
- Vertical panel mounting structure for electrical cabinet installation
- Front panel equipped with LED status indicators and diagnostic display window
- Separate terminal areas for main power, control power, motor output and encoder feedback
- Built-in cooling fan and air duct for heat dissipation
- Metal shielding structure to suppress electromagnetic radiation interference
Working Principle: The controller receives position and motion commands from upper CNC or motion controller via SERCOS bus. The encoder feeds back real-time motor position and speed signals to the drive. Internal DSP executes high-speed closed-loop control algorithm to calculate required torque output. PWM signal drives IGBT power stage to adjust motor stator current. The built-in protection circuit continuously monitors voltage, current and temperature parameters and triggers protection action once exceeding safe threshold. Regenerative energy generated during motor deceleration is consumed by internal brake chopper circuit.
Installation Requirements:
- Mount vertically inside ventilated electrical cabinet
- Reserve 100mm clearance at top and bottom for air circulation
- Keep away from contactors, transformers and other high electromagnetic interference sources
- Separate motor power cable and encoder signal cable, use shielded encoder cable
- Implement reliable protective grounding according to local electrical codes
- Install external braking resistor when regenerative energy exceeds internal brake capacity
Usage Notes:
- Confirm motor rated parameters and encoder type before power-on
- Do not apply input voltage exceeding rated 480V AC
- Regularly inspect cooling fan operation and clean dust accumulation on heat sink
- Backup drive parameters before firmware upgrade or maintenance
- Disconnect main power and control power before opening enclosure
- Avoid frequent power cycling within short time period
