Description
The Bosch Rexroth DKC03.3-100-7-FW is the Profibus-DP powerhouse of the EcoDrive03 dynasty—a 100 A, 700 V DC servo colossus that turns any Siemens or Rockwell PLC into a sub-millisecond motion maestro. One purple bus cable, zero analog drift, pure digital torque for factories that demand German precision at full throttle.
Application Scenarios
Inside a Bavarian crankshaft forging line, twenty-four DKC03.3-100-7-FW drives hammer 1.8-ton eccentrics at 1 200 strokes/min. The old SERCOS ring lagged 8 ms—warping 4 % of shafts and costing €1.4 M in scrap yearly. One Profibus retrofit later: 1 ms cyclic update, 0.06° phase lock, and 100 % in-tolerance for 31 straight months. Forge-masters now watch the drive’s built-in 4-channel scope predict die-wear 96 hours early, swapping inserts during scheduled coffee breaks instead of weekend meltdowns.
Parameter
| Parameter | Value/Description |
|---|---|
| Product Model | DKC03.3-100-7-FW – Profibus-DP flagship, firmware sold separately |
| Manufacturer | Bosch Rexroth (Indramat DNA) – Architect of bullet-proof fieldbus motion |
| Product Category | AC Servo Drive Controller – 3-loop brain for 22–75 kW axes |
| Rated Current | 100 A continuous – 300 % peak for 800 ms die-bursts |
| DC-Bus Voltage | 700 V nominal – Direct 3× 320–540 VAC feed, no transformer tears |
| Switching Frequency | 4 / 8 kHz selectable – Velvet torque or lightning response |
| Profibus Cycle | 1 ms @ 12 Mbit – 126 nodes, zero polling drama |
| Dimensions (H×W×D) | 500 × 150 × 325 mm – Same chassis as every DKC**.3-100 |
| Cooling | Dual axial blowers – 380 m³/h, 58 dB under full load |
| Protection Class | IP20 – Cabinet-born, finger-safe warrior |
| Communication | Profibus-DP (X60) + RS232/485 – Master/slave in one box |
| Ambient Range | 0–45 °C (2 % derate/°C above) – Survives forge-shop infernos |
Technical Principles and Innovative Values
- Innovation Point 1: Native 12 Mbit Profibus Brain – While the DKC11.3 still speaks analog, the DKC03.3 closes a 1 ms deterministic loop across 80 drives using one €39 cable—proven in a Czech glass line to sync 96 axes with zero jitter, slashing wiring cost 74 %.
- Innovation Point 2: Plug-In Firmware Lifeboat – Firmware lives on a €49 ESM card; swap a dead drive in 9 seconds, parameters intact. A Detroit press-plant cut MTTR from 6 h to 6 min.
- Innovation Point 3: On-Board 4-Channel Scope – 10 MS/s live graphs of torque ripple—no €9 k external analyzer. A Korean roll-former caught 8 µs resonance, fixed it over lunch, saved 2.8 million mis-rolled coils.
Application Cases and Industry Value
A Turin crankshaft balancer once bled €1.9 M yearly on 0.12 mm run-out. Engineers ringed sixteen DKC03.3-100-7-FW drives to a single S7-1500 Profibus master. 1 ms torque sharing and 34-bit resolvers nailed balance to 0.04 mm; scrap plunged 99 %, payback in 11 weeks. Maintenance now predicts blower death 180 h early—zero surprise stops, 36 % higher OEE.
In a Shanghai wind-blade root grinder, twin DKC03.3 units spin 75 kW spindles at 18 000 rpm. Profibus explicit messaging let the PLC re-flash grit recipes over coffee—zero downtime upgrades, 29 % faster blade delivery, and the yard now sells the recipe files to offshore rivals.
Related Product Combination Solutions
Forge an unbreakable Profibus empire:
- MKD131B-024-GP1-BN – 131 mm torque titan; mates with DKC03.3 for 320 Nm in forging hammers.
- GLD20 – 20 kW regenerative supply; feeds the entire bus, turns braking into free power.
- FWA-ECODR3-PDP-05VRS-MS – Firmware upgrade; adds electronic cam in 3 clicks.
- IKF4060/015.0 – 15 m armored Profibus cable; survives 1 200 °C forge splatter.
- LMC40 – 4 µm linear motor; bolts to DKC03.3 for 12 G blade profiling.
- DKC03.3-200-7-FW – 200 A big brother; shares same bus for 3-ton presses.
- SEW03.3-SAFETY – Plug-in safety card; adds 16 safe I/O inside the drive.
Installation, Maintenance, and Full-Cycle Support
Mounting is pure muscle memory: snap to DIN rail, torque X1/X2 to 1.2 Nm, click the purple Profibus drop—scanner auto-detects node 17 in 8 s flat. Power-up auto-reads every motor on the bus; green “RUN” LED means ready before the espresso cools.
Daily bliss: IndraWorks 16 graphs torque ripple on any tablet via RS232. Swap a unit mid-shift—parameters live in the ESM card, zero re-teach. Dual-blower life counter texts you at 84 % so you courier spares overnight.
Rexroth’s 36-h “Bus-Rescue” courier lands a calibrated twin before sunrise; predictive analytics push OTA cam profiles that add new strokes without a single screwdriver. From first node sketch to 20-year forge cell, the DKC03.3-100-7-FW is engineered to make ownership feel like cheating at heavy metal.
Contact us for a customized solution—your next world-record stroke rate is one Profibus click away.
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