Rexroth DKC11.1-040-7-FW

Technical Specifications

• Model Code Definition:

  DKC11.1 = hardware platform revision 11.1

  040 = 4.0 A continuous rated output current

  7 = EnDat 2.2 absolute digital encoder feedback interface

  FW = integrated Profibus-DP fieldbus firmware variant

• Continuous Output Current: 4.0 Arms
• Peak Overload Output Current: 8.0 Arms (30 s maximum overload duration)
• Encoder Feedback Type: EnDat 2.2 multi-turn absolute digital encoder
• Main Power Input: 3 x 200 VAC ~ 480 VAC three-phase industrial mains supply
• Auxiliary Control Power: 24 VDC external logic power supply
• Integrated Communication Bus: Profibus-DP via embedded FW firmware
• Operating Ambient Temperature: 0 °C ~ +45 °C cabinet continuous operation

Functional Features

1. Position, velocity, torque three independent closed-loop control modes fully parameter configurable
2. Electronic cam and electronic gearing synchronous multi-axis motion control function
3. Multi-turn EnDat absolute encoder support eliminates power-loss mechanical homing cycle
4. Embedded motion programming logic via internal FW firmware without auxiliary controller
5. Complete hardware protection suite: overcurrent, overvoltage, undervoltage, overtemperature, motor stall, encoder signal loss
6. On-board digital input/output terminals for external limit switch, drive enable, fault reset interlock signals
7. Real-time motion command and status data cyclic transmission via Profibus-DP fieldbus

Performance Parameters

• Position loop closed bandwidth: 1300 Hz maximum dynamic response
• Steady-state speed regulation accuracy: ±0.01% rated motor speed
• Power module overtemperature protection trigger point: +86 °C
• Minimum fieldbus command refresh cycle: 0.25 ms
• Full continuous load power dissipation: 195 W

Material Composition

• Drive housing: Powder coated cold rolled steel compact cabinet mount casing
• Power stage substrate: Aluminum insulated metal substrate with high heat conduction efficiency
• Control circuit board: Multi-layer FR4 high-speed signal isolation printed circuit board
• Power switching components: Silicon IGBT three-phase inverter power bridge

Structural Characteristics

• Dual mounting options: standard 35 mm DIN rail installation or flat vertical panel mounting
• Front panel configuration: two-digit fault code LED display, power/bus status indicator LED, service micro-USB firmware update port
• Independent separated terminal zones: three-phase main power terminals, servo motor power terminals, EnDat encoder terminal block, safety DI/DO signal terminals
• Rear integrated extruded aluminum passive heat sink fin array for power stage heat dissipation

Working Principle

Advantage Highlights

• Medium power compact design balances cabinet space saving and medium load driving capacity
• Native EnDat absolute encoder interface removes mandatory homing operation after power cycle
• Built-in Profibus-DP firmware omits external communication adapter hardware cost
• High closed-loop bandwidth achieves high-precision fast positioning motion performance
• Comprehensive full hardware fault protection system prevents permanent drive and motor damage

Applicable Industries

Installation Requirements

1. Mount drive vertically with rear heat sink fins facing downward for natural convection cooling
2. Maintain minimum 10 cm vertical ventilation gap between adjacent servo drive units
3. Use EMC-compliant shielded motor power cable and fully shielded EnDat encoder cable with 360° gland grounding
4. Connect drive protective earth terminal to cabinet low-impedance protective earth copper bar

Operation Precautions

1. Ambient temperature exceeding +45 °C requires forced air cooling for continuous full-load operation
2. Complete servo motor parameter auto-identification before initial equipment commissioning
3. Maintain 10-minute power-off waiting period before disassembling wiring to discharge residual DC bus capacitor voltage
4. Limit peak overload continuous operation duration strictly within 30 seconds to avoid thermal power module degradation
5. Only official Rexroth dedicated engineering software permitted for FW firmware modification and parameter backup