Bosch Rexroth DDS2.1-W050-D Digital Servo Drive
Description
Model Definition
DDS2.1: DDS02.1 series for DIAX02 systems
W: Internal cabinet convection cooling
050: 50 A continuous / 100 A peak current
D: Digital servo feedback interface (encoder-based)
Technical Specifications
Electrical Parameters
DC bus voltage: 300 V DC ±15% (from TVD/TVM power units)
Control power: 24 V DC (20–28 V DC)
Continuous output current: 50 A
Peak output current: 100 A (short-term)
Current loop: 125 μs; Speed loop: 500 μs; Position loop: 2 ms
Power dissipation: ~220 W
Compatible motors: MDD/MKD synchronous servos, LAR/LAF linear motors, 2AD series (digital encoder feedback)
Mechanical & Environmental
Cooling: Internal cabinet convection
Protection class: IP20 (front), IP10 (unit)
Operating temperature: 0 °C to +45 °C (20% derate at 55 °C)
Storage temperature: -30 °C to +85 °C
Max altitude: 1000 m (35% derate above)
Dimensions (W×H×D): 60 mm × 408 mm × 180 mm
Weight: ~7.5 kg
Interface and Communication Configuration
Motor feedback: X4 interface for digital encoder (D-type)
System bus: Shared 300 V DC bus (multi-axis parallel)
Communication: Expansion slots (U1–U5) for SERCOS, analog, or fieldbus modules
Digital I/O: 6 isolated inputs / 3 isolated outputs
Service port: RS232 (IndraWorks setup/diagnostics)
Core Functions
Three-loop control (current/speed/position) for precision
Digital feedback ensures high resolution and noise immunity
Compact convection cooling for cabinet installation
Full protection: overvoltage/undervoltage/overcurrent/short-circuit/overheating/feedback loss
Torque/speed/position control modes
Modular design for maintenance and expansion
Application Scenarios
Medium-load CNC main/auxiliary axes (digital encoders)
Printing/packaging/textile machinery (high precision)
Automated assembly lines, gantries, conveyors
DIAX02 system upgrades (50 A, digital feedback)
Space-constrained cabinets without external cooling
Usage and Maintenance
Ensure cabinet airflow for cooling efficiency
Ambient temperature ≤45 °C to avoid derating
Complete power/feedback/control wiring before power-on
Parameterize via IndraWorks (motor/load matching)
Clean heat sinks/air passages every 6 months; check terminals
Calibrate loops/encoder signals annually
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