Rexroth DKC01.3-040-7-FW

Technical Specifications

• Model Code Definition: DKC01.3 = hardware platform version 01.3; 040 = 4.0 A continuous output current rating; 7 = encoder feedback interface variant; FW = fieldbus firmware integrated variant
• Rated Continuous Output Current: 4.0 Arms
• Peak Overload Output Current: 8.0 Arms (30 second maximum overload duration)
• Supported Servo Motor Type: Rexroth three-phase permanent magnet synchronous servo motor
• Encoder Feedback Interface Variant 7: EnDat 2.2 digital absolute encoder interface
• Main Power Supply Input: 3 x 200 VAC ~ 480 VAC three-phase industrial mains
• Control Logic Power Supply: 24 VDC external auxiliary control power
• Field Bus Communication: Profibus-DP FW integrated bus firmware
• Operating Temperature Range: 0 °C ~ +45 °C cabinet continuous operation

Functional Features

1. Three closed-loop control modes: position loop, velocity loop, torque loop fully programmable
2. Built-in electronic gearbox function for multi-axis synchronous cam motion control
3. Absolute EnDat encoder support eliminates mechanical homing requirement after power cycle
4. Integrated digital motion sequence programming via internal firmware logic
5. Hardware overcurrent, overvoltage, overtemperature, motor stall multi-layer protection system
6. Built-in digital input/output terminals for external limit switch, enable and fault reset signals
7. Profibus-DP fieldbus real-time motion command and status data exchange with master PLC

Performance Parameters

• Position loop bandwidth: 1200 Hz maximum closed-loop response bandwidth
• Speed regulation accuracy: ±0.01% rated motor speed without load fluctuation
• Overtemperature protection trigger threshold: +85 °C internal power module temperature
• Motion command cycle time: 0.25 ms minimum fieldbus command update cycle
• Rated power dissipation under full continuous load: 180 W

Material Composition

• Drive housing: Cold rolled steel sheet powder coated anti-corrosion cabinet mount casing
• Power stage substrate: Aluminum insulated metal substrate (IMS) for high heat dissipation
• Control board: FR4 multi-layer printed circuit board with surface mount industrial chips
• Power switching components: Silicon IGBT power transistor three-phase inverter bridge

Structural Characteristics

• Vertical DIN rail or flat panel mounting dual installation compatibility
• Front panel layout: 7-segment fault code display, operation status LED, firmware service USB port
• Separate terminal sections: main three-phase power terminals, motor power terminals, encoder feedback terminal block, DI/DO signal terminals
• Rear integrated aluminum heat sink fin array for passive power stage heat dissipation

Working Principle

Advantage Highlights

• Compact single-axis design reduces control cabinet space occupation for small machinery equipment
• Native EnDat absolute encoder interface removes mandatory homing cycle after power restart
• Integrated Profibus-DP firmware eliminates external communication adapter hardware cost
• Ultra-high position loop bandwidth delivers ultra-precise high-speed motion positioning
• Multi-layer full hardware protection prevents motor and drive damage under abnormal operating conditions

Applicable Industries

Installation Requirements

1. Mount drive vertically with heat sink fins oriented downward for natural convection heat dissipation
2. Maintain minimum 10 cm vertical ventilation gap above and below adjacent servo drives
3. Install EMC shielded power cable between drive and servo motor with 360° cable gland shielding
4. Connect DC bus earth terminal to cabinet high-frequency protective earth copper bar

Operation Precautions

1. Do not operate drive above +45 °C ambient temperature; forced air cooling required for sustained full load
2. Complete motor parameter auto-identification procedure before first commissioning operation
3. Cut off three-phase main power supply minimum 10 minutes before disassembling wiring to discharge DC bus capacitor residual voltage
4. Avoid frequent repeated rapid start-stop operation exceeding 30-second peak overload duration limit
5. Use only official Rexroth FW firmware update software for drive program modification