Application Scenarios
On a high-speed rotary pillow-packaging line in Eastern Europe running at 420 packs/min, the legacy S7-300 + FM352 positioning combo struggled with cam-curve jitter during format changeovers—every recipe switch cost 18 minutes of downtime and wasted film. After retrofitting the line with the 6AU1425-0AA00-0AA0 mounted inside the existing S120 cabinet, the machine builder leveraged the D425’s native electronic cam (CAM) and registration-fly-cut logic to resynchronize all six servo axes within two servo cycles (< 4 ms). The 6AU1425-0AA00-0AA0 pulled encoder and torque data over DRIVE-CLiQ without extra wiring, and the ±1 µs synchronization precision eliminated mark-to-cut drift. The plant reported a 22% OEE gain and cut film waste by 9% in the first quarter—proof that even a “discontinued” D425 still delivers modern performance when matched to the right mechanics.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 6AU1425-0AA00-0AA0 |
| Manufacturer | Siemens (SIMOTION series) |
| Product Category | Drive-Based Programmable Motion Controller (Basic Performance) |
| Max. Controlled Axes | 16 (6 servo + 4 vector + 8 V/f) |
| Work Memory (RAM) | 48 MB (incl. 20 MB for Java applications) |
| Load Memory (CF) | 300 MB persistent (user data on CF card) |
| Retentive Memory | 364 KB |
| Fieldbus Interfaces | 2 × PROFIBUS DP (master/slave, min. cycle 2 ms) |
| Ethernet / USB | 2 × Industrial Ethernet, 2 × USB 2.0 |
| DRIVE-CLiQ Ports | 4 (native SINAMICS S120 connection) |
| Digital I/O | 8 DI + 8 DI/DO configurable |
| Supply Voltage | 24 V DC (20.4 … 28.8 V), typ. 600 mA, ~15 W loss |
| Operating Temp. | 0 … +55 °C (derating above 2000 m altitude) |
| Dimensions (H × W × D) | 380 × 50 × 270 mm (spacer removed: 230 mm depth) |
| Protection / Weight | IP20 / approx. 2.7 kg |
Technical Principles and Innovative Values
- Innovation Point 1: Drive-Based Single-Chassis Architecture. The 6AU1425-0AA00-0AA0 slots directly into the SINAMICS S120 control section, sharing the same 24 V backplane and cooling path. DRIVE-CLiQ replaces dozens of encoder and power-cable pairs with a single shielded telegram—reducing cabinet wiring by up to 40 % versus a standalone PLC + drive topology.
- Innovation Point 2: PLC + Motion Kernel in One Cycle. Unlike standard PLCopen motion add-ons, the D425 runs Siemens’ MCC (Motion Control Chart) and MCO (Motion Control Objects) natively on the same processor. Minimum servo/interpolator cycle is 2 ms, with PROFINET IRT (via optional CBE30 card) pushing down to 0.5 ms send clock—tight enough for flying shear, registration cutting, and web tension loops.
- Innovation Point 3: Flexible I/O + Option Slot Expansion. The onboard 8 DI + 8 DI/DO block supports hardware interrupts and measuring inputs (reproducibility 5 µs); the dedicated option slot accepts CBE30 (PROFINET), CBP (PROFIBUS advanced), or technology boards, letting the 6AU1425-0AA00-0AA0 adapt to legacy fieldbuses without changing the base CPU.
Application Cases and Industry Value
Case 1 – Lithium-ion Electrode Calendaring (China, 2022). A battery-equipment OEM needed ±0.8 µm gap control across a 1.4 m carbon-fiber roller driven by four S120 servo axes. They deployed the 6AU1425-0AA00-0AA0 with an M42 16-axis license, using the D425’s built-in tension/position cascade and CAM profile to compensate for roll eccentricity in real time. Compared with their previous S7-1500 + technology-object approach, the D425 reduced sync jitter from 12 µs to under 2 µs, improving electrode thickness uniformity by 18 %. The OEM has since standardized the D425 across 30+ calendaring lines still shipping today.
Case 2 – 10-color Rotogravure Press (Italy, 2020). Each print unit (10 units × 2 axes = 20 axes total) was split across two 6AU1425-0AA00-0AA0 units linked via PROFIBUS. The ‘s electronic line-shaft emulation replaced mechanical jackshafts, allowing “print-on-the-fly” register correction at 350 m/min. Operators reported that job changeovers dropped from 45 min to 12 min because cam curves were stored as software recipes rather than mechanical gear swaps.
Related Product Combination Solutions
The 6AU1425-0AA00-0AA0 lives inside the SINAMICS/SIMOTION ecosystem; typical companion models include:
- 6AU1425-0AB00-0AA0 (SIMOTION D435-2) – Next-performance-tier drive-based unit, 32-axis capacity, the natural migration path now that is discontinued.
- 6AU1445-0AA00-0AA0 (SIMOTION D445) – High-performance variant for 64+ axis systems, often specified when a reaches its 16-axis ceiling.
- 6SL3040-0MA00-0AA1 (SINAMICS CU320-2 DP) – Companion control unit when the drive rack needs a pure drive-controller alongside the motion CPU.
- 6SL3120-1TE21-8AA3 (SINAMICS S120 PM340 Power Module) – Typical booksize power stage paired with the in compact multi-axis cabinets.
- 6FC5310-0AA00-1AA0 (SIMOTION CBE30) – Option-card that adds PROFINET IO with IRT to the 6AU1425-0AA00-0AA0‘s free slot.
- 6AU1260-2AA00-0AA0 (M42 License Key, 16-axis) – Software authorization unlocking the ‘s full 16-axis servo/vector count.
