Model Definition

DKC: Drive Controller (EcoDrive 03 series)

0.3: Platform revision (compatible with DKC02.3/DKC03.3 hardware)

040: Rated output current (40 A RMS)

7: Voltage class (700 V DC nominal bus)

FM: Factory-configured firmware (standard motion control)

Technical Specifications

Electrical Parameters

Input voltage: 3-phase 200–480 V AC, 50/60 Hz

Rated output current: 40 A (continuous), 80 A (peak, 2.5× overload)

DC bus nominal voltage: 700 V DC

Output voltage: Up to 800 V AC

Output frequency: 0–1000 Hz

Control supply: 24 V DC (±20%), 21 W power consumption

Short-circuit current rating: 42,000 A RMS

Mechanical & Environmental Parameters

Dimensions (W×H×D): 65 mm × 360 mm × 261 mm

Weight: Approximately 5.7 kg

Operating temperature: 0 °C to +45 °C (pollution degree 2)

Storage temperature: -30 °C to +85 °C

Protection class: IP20

Cooling: Internal blower (vertical mounting required)

Interface and Communication Configuration

Backplane: Internal system bus for power and logic exchange

Fieldbus: SERCOS (fiber-optic), PROFIBUS DP, CANopen (optional cards)

I/O: 24 V DC digital inputs/outputs (enable, fault, reference, limit switches)

Feedback: Incremental encoder (standard), absolute encoder (optional)

Diagnostics: 7-segment display, LED status indicators (power, run, fault)

Core Functions

Precision speed, position, and torque control for single-axis applications

2.5× overload capacity for dynamic acceleration/deceleration

Built-in motion profiles (point-to-point, jog, homing)

Comprehensive protection: overvoltage, undervoltage, overcurrent, overtemperature, short circuit

Real-time fault diagnosis with error code logging

Compatibility with Indramat MKD/MKE series servo motors

Application Scenarios

CNC machine tools (milling, turning, grinding)

Packaging, printing, and textile machinery

Automated assembly lines and material handling systems

Robotics and gantry systems requiring high precision

Retrofit projects replacing older DKC02.3/DKC03.3 drives

Usage and Maintenance

Install only in vertical orientation with minimum 80 mm bottom clearance and 150 mm top clearance for airflow

Verify input voltage matches drive rating before powering on

Wire motor and encoder cables per Rexroth guidelines (shielded, separated from power cables)

Check blower operation monthly; clean filters every 3–6 months in dusty environments

Inspect I/O terminal connections quarterly for tightness

Update firmware via SERCOS or RS232 using Rexroth IndraWorks software