Model Definition

DDS03.2: DIAX03 system servo drive series (firmware v3.x)

W: Internal cabinet air cooling

050: 50 A continuous current, 100 A peak current

BE23: SERCOS III fiber‑optic interface + high‑resolution analog speed/torque interface

01: Hardware revision 01

FW: Factory‑configured firmware module (pre‑loaded DIAX03 standard firmware)

Technical Specifications

Electrical Parameters

DC bus voltage: 300 V DC ±15% (powered by TVD/TVM supplies)

Control supply: 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: ~200 W (@50 A)

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

Mechanical & Environmental

Cooling: Internal air blower + heatsink

Protection class: IP20 (front), IP10 (overall)

Operating temperature: 0 °C to +45 °C (20% derating @55 °C)

Storage temperature: -30 °C to +85 °C

Max altitude: 1000 m (35% derating above)

Dimensions (W×H×D): 80 mm × 408 mm × 180 mm

Weight: ~6.2 kg

Interface and Communication Configuration

Motor feedback: X4 interface (digital servo encoder + resolver, dual‑channel)

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

Communication: BE23 = SERCOS III (fiber‑optic, 2/4 Mbps) + high‑resolution analog speed/torque

Digital I/O: 6 isolated inputs / 3 isolated outputs (expandable via DEA04.2M to 15 inputs / 16 outputs)

Service port: RS232 (IndraWorks setup/diagnostics)

Expansion slots: U1 (SERCOS), U5 (firmware), U2–U4 (I/O/options)

Core Functions

Three‑loop control (current/speed/position) for high precision

BE23: Pre‑configured SERCOS III + high‑resolution analog speed/torque interface

FW: Factory‑loaded DIAX03 firmware (no on‑site flashing required)

Internal cooling saves cabinet space for dense multi‑axis layouts

Comprehensive protection: over/undervoltage, overcurrent, short circuit, overheat, feedback loss

Torque/speed/position control modes

Modular design for easy maintenance/upgrades

Application Scenarios

High‑power CNC machine axes with high‑resolution analog speed/torque control

Textile/printing/packaging machinery requiring multi‑axis sync + precision torque regulation

Automated assembly lines & handling robots needing SERCOS III + analog speed control

Automation systems requiring SERCOS III real‑time communication + high‑precision analog interface

DIAX03 system upgrades needing pre‑configured firmware + communication/control interfaces

Usage and Maintenance

Ensure unobstructed cabinet airflow (maintain cooling efficiency for 50 A operation)

Keep ambient ≤45 °C to avoid performance derating

Complete power/feedback/control wiring before power‑on

Configure via IndraWorks (motor/load parameters pre‑compatible with FW version)

Clean air passages/heatsinks every 6 months; inspect terminals

Calibrate control loops/feedback annually for stability

FW module: Backup configuration before replacement; use only Rexroth‑approved firmware updates

Key Difference from Non‑FW Model

The FW suffix denotes a factory‑installed, pre‑validated firmware module (DIAX03 standard release). This eliminates on‑site firmware flashing, reduces commissioning time, and ensures compatibility with the drive’s hardware revision—critical for series production or system retrofits.