Bosch Rexroth DDS02.1-W050-RL20-01 Digital Servo Drive
May 29, 2026

Bosch Rexroth DDS02.1-W050-RL20-01 Digital Servo Drive

Product Description The DDS02.1-W050-RL20-01 is a modular digital AC servo drive of Bosch Rexroth DDS02.1 series. It is fitted with cabinet internal air cooling, 50 A continuous rated current and RL20 resolver interface. Optimized for cabinet mounting, it delivers stable motion performance for medium-power systems working in harsh industrial environments.

Description

Model Definition

DDS02.1: Servo drive series 02.1 for DIAX02 system

W: Cabinet internal air cooling

050: 50 A continuous rated current

RL20: Advanced resolver feedback interface

01: Hardware and firmware version 01

Technical Specifications

Electrical Parameters

DC bus voltage: 300 V DC ±15%, supplied by TVD / TVM power supply units

Control power supply: 24 V DC (20 V DC to 28 V DC)

Continuous output current: 50 A

Peak output current: 100 A for short-term operation

Current loop cycle: 62.5 μs

Speed loop cycle: 250 μs

Position loop cycle: 1 ms

Motor feedback: Resolver signal input

Power dissipation: Approx. 150 W

Mechanical & Environmental Parameters

Cooling method: Cabinet internal air cooling, vertical installation required

Protection class: IP20 on front panel, IP10 overall

Operating temperature: 0 °C to +45 °C, performance derating available up to 55 °C

Storage temperature: -30 °C to +85 °C

Maximum installation altitude: 1000 m, performance derating required above this height

Approximate weight: 8.5 kg

Dimensions (W×H×D): 110 mm × 390 mm × 310 mm

Interface and Communication Configuration

Control interface: RL20 resolver feedback interface

Motor feedback interface: Resolver signal reception

System bus: Shared 300 V DC bus for multi-axis connection

Digital I/O: 8 digital inputs and 4 digital outputs for enable, fault alarm, limit switch and brake control

Expansion slots: Multiple slots for optional communication and functional modules

Service port: RS232 port for parameter setting via IndraWorks software

Core Functions

Three-loop control of current, speed and position guarantees steady dynamic response and reliable operation.

RL20 resolver interface features strong anti-vibration and anti-dust capability, with improved signal processing performance.

Integrated cooling design adapts to compact cabinet layout and saves installation space.

Modular structure allows flexible function expansion and easy field maintenance.

Comprehensive protection against overvoltage, undervoltage, overcurrent, short circuit, overheating and feedback loss.

Supports torque, speed and position control modes to meet various medium-power motion demands.

Application Scenarios

Medium-sized CNC machine tools in dusty and high-vibration workshops

Industrial machinery equipped with resolver-equipped servo motors

Woodworking, textile, conveying and general automation equipment

Equipment retrofitting and renovation projects for resolver systems

Medium-power motion control systems with strict environmental adaptability requirements

Usage and Maintenance

Install the drive vertically and ensure sufficient ventilation inside the cabinet.

Keep ambient temperature below 45 °C during operation.

Complete wiring of DC bus, control power, motor cable and resolver cable before commissioning. Configure parameters via IndraWorks software.

Clean internal fan and heat sink every 6 months, and inspect terminal connections periodically. Calibrate control loops every 2 years to maintain stable operation.


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