Bosch Rexroth DDS02.1-W050-RL02-01-FW Digital Servo Drive
May 29, 2026

Bosch Rexroth DDS02.1-W050-RL02-01-FW Digital Servo Drive

Product Description The DDS02.1-W050-RL02-01-FW is a modular digital AC servo drive from Bosch Rexroth DDS02.1 series. It adopts cabinet internal air cooling, 50 A continuous rated current and RL02 resolver interface. Equipped with removable firmware module, this unit is designed for cabinet installation and delivers stable operation in harsh industrial environments for medium-power motion control systems.

Description

Model Definition

DDS02.1: Servo drive series 02.1 for DIAX02 system

W: Cabinet internal air cooling

050: 50 A continuous rated current

RL02: Resolver feedback interface, version 02

01: Hardware and firmware version 01

FW: Removable independent firmware module

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 interface

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: RL02 resolver feedback interface

Motor feedback interface: Resolver signal input

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

Firmware module: Detachable FW module for firmware storage and parameter backup

Core Functions

Three-loop control of current, speed and position ensures reliable dynamic performance.

Resolver feedback features strong vibration and dust resistance, suitable for tough working conditions.

Detachable firmware module enables quick drive replacement and fast parameter recovery.

Built-in cooling structure fits compact cabinet layout and saves installation space.

Modular design supports flexible function expansion and convenient on-site maintenance.

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

Supports torque, speed and position control modes for diverse medium-power motion applications.

Application Scenarios

Medium-sized CNC machine tools operating in dusty or high-vibration sites

General industrial machinery equipped with resolver-type servo motors

Woodworking, textile and conveying automation equipment

On-site equipment renovation and retrofit projects

Machinery requiring rapid maintenance and drive replacement

Usage and Maintenance

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

Keep ambient temperature below 45 °C during operation.

Install the firmware module correctly and 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.

Transfer the firmware module directly to a new unit for quick restoration during replacement.


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