Siemens 6RY1803-0AA25-0AA1 Advanced Coated Control Unit
An Advanced CUD spare with coated electronics for SINAMICS DCM converter service and retrofit planning.
Technical Summary
6RY1803-0AA25-0AA1 is the coated Advanced CUD used in SINAMICS DCM control-module configurations. The Siemens parts structure associates this article with assembly C98043-A7100-L204 and identifies it as the coated counterpart of the uncoated Advanced CUD.
For retrofit work, the control unit is paired with the coated connector board 6RY1803-0GA20. The CUD location, connector-board coating, installed options and converter nameplate must therefore be checked as one service configuration.
Specifications
| Manufacturer | Siemens |
|---|---|
| Model | 6RY1803-0AA25-0AA1 |
| Product Family | SINAMICS DCM |
| Component | Advanced Control Unit / CUD |
| Construction | Coated electronics |
| Associated Assembly | C98043-A7100-L204 |
| Retrofit Companion | Coated connector board 6RY1803-0GA20 |
| Installation Side | Suitable for left- or right-hand CUD position when system requirements are met |
| Memory Class | 32 MB |
| Order Context | Spare-part and retrofit service |
Features
- Provides the Advanced CUD control function for a matching SINAMICS DCM configuration.
- Uses coated electronics for installations that specify the coated variant.
- Can occupy either CUD position when the required system options and companion hardware are present.
- Retains a traceable Siemens spare identity for converter maintenance.
Compatibility
- Match the complete SINAMICS DCM converter nameplate and installed CUD option.
- Confirm that the connector board is the coated 6RY1803-0GA20 version for retrofit work.
- Check left/right CUD assignment, memory-card use and communications options before exchange.
- Compare the full C98043 assembly label and hardware revision, not only the front appearance.
Replacement
- Archive drive parameters, option records and diagnostic history before isolation.
- Apply the converter discharge procedure and ESD controls, then photograph every connector.
- After installation, restore only the approved configuration and complete controlled functional testing.
FAQ
What distinguishes 6RY1803-0AA25-0AA1 from the uncoated Advanced CUD?
6RY1803-0AA25-0AA1 is the coated Advanced CUD variant; coating must remain consistent with the required service configuration.
Which connector board is needed when retrofitting 6RY1803-0AA25-0AA1?
Use the coated connector board 6RY1803-0GA20 and verify the complete retrofit arrangement against the host converter.
Can 6RY1803-0AA25-0AA1 be installed in either CUD position?
The CUD article is not tied to one side, but the installed option set and left/right system architecture still have to be verified.
What label information should accompany a 6RY1803-0AA25-0AA1 enquiry?
Provide the converter order number, CUD assembly barcode, connector-board label, installed position and all fitted communication or memory options.
Does 6RY1803-0AA25-0AA1 alone form a complete retrofit kit?
No. A retrofit also requires the correctly coated connector board and verification of the host configuration.
What checks follow replacement of 6RY1803-0AA25-0AA1?
Review diagnostics, option recognition, communications, field and armature control, and all machine safety functions under controlled conditions.
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