Bosch Rexroth DDS2.1-W025-DS29-01 Digital Servo Drive
May 29, 2026

Bosch Rexroth DDS2.1-W025-DS29-01 Digital Servo Drive

Product Description The DDS2.1-W025-DS29-01 is a modular digital AC servo drive of DDS02.1 series for DIAX02 control systems. It applies internal cabinet convection cooling, with 25 A continuous current and 50 A short-term peak current. It is equipped with DS29 SERCOS communication interface and 01 optimized hardware revision, suitable for multi-axis automation systems demanding high-reliability bus communication.

Description

Model Definition

DDS2.1: Servo drive series compatible with DIAX02 system

W: Internal cabinet convection air cooling

025: 25 A continuous rated current, 50 A short-term peak current

DS29: Specialized SERCOS communication interface

01: Optimized hardware revision for enhanced stability and compatibility

Technical Specifications

Electrical Parameters

DC bus voltage: 300 V DC ±15%, powered by TVD or TVM power units

Control power supply: 24 V DC, operating range 20 V DC to 28 V DC

Continuous output current: 25 A

Peak output current: 50 A for short-time operation

Current loop cycle: 125 μs

Speed loop cycle: 500 μs

Position loop cycle: 2 ms

Power dissipation: Approximately 110 W

Compatible motors: MDD, MKD synchronous servo motors, LAR, LAF linear motors, 2AD series motors

Mechanical & Environmental Parameters

Cooling method: Internal cabinet convection air cooling

Protection class: IP20 for front panel, IP10 for the whole unit

Operating temperature: 0 °C to +45 °C, 20% performance derating at 55 °C

Storage temperature: -30 °C to +85 °C

Maximum installation altitude: 1000 m, 35% performance derating above 1000 m

Dimensions (W×H×D): 60 mm × 408 mm × 180 mm

Weight: Approximately 5.5 kg

Interface and Communication Configuration

Motor feedback: X4 dual-channel interface supporting digital encoder and resolver signals

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

Communication: DS29 SERCOS interface for real-time data transmission and multi-axis synchronous control

Digital I/O: 6 isolated inputs and 3 isolated outputs for basic control signals

Service port: RS232 interface for parameter setting and fault diagnosis via IndraWorks

Expansion slots: U1 to U5 for installing additional I/O and functional modules

Core Functions

Current, speed and position three-loop control ensures stable and high-precision motion performance.

DS29 SERCOS interface features strong anti-interference and stable data transmission.

01 optimized hardware revision improves overall operational reliability.

Compact internal cooling structure adapts to narrow cabinet installation space.

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

Supports torque, speed and position control modes to meet various working conditions.

Modular structure facilitates daily maintenance and function expansion.

Application Scenarios

Multi-axis linkage auxiliary axes of CNC machine tools

Textile, printing and packaging machinery with synchronous operation requirements

Medium-sized automated assembly lines and conveying equipment

DIAX02 system upgrade projects configured with DS29 SERCOS bus

Automation equipment with limited cabinet space and high communication stability requirements

Usage and Maintenance

Maintain smooth air circulation inside the cabinet to guarantee heat dissipation effect.

Keep ambient temperature below 45 °C to prevent performance decline.

Complete wiring of power, feedback, bus and control circuits before power-on.

Set parameters and configure bus network via IndraWorks according to actual application.

Clean heat dissipation components and air passages every six months, and inspect terminal connections regularly.

Calibrate control loops, feedback signals and bus communication status once a year to maintain long-term stable operation.


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