ASM SIPLACE 03090201 is the RSF MS22 X/Y reading head documented in the 677 mm configuration. The key purchasing point is the measuring-length version: another part can carry the same MS22 family name and still belong to a different axis measuring configuration.
Reading heads are part of the axis position-feedback system. When an axis feedback or positioning fault is under investigation, intermittent behavior that changes with machine movement can justify checking the reading head, connector and associated measuring path. These symptoms are not unique to 03090201, so the fault should be isolated before replacing the encoder component.
03090201 MS22 677 mm Matching
| Part Number | 03090201-01 |
|---|---|
| Part Type | Linear encoder reading head |
| Encoder Family | RSF MS22 |
| Term Note | RSF identifies the encoder manufacturer/family; the reading head provides axis position-feedback information |
| Axis Reference | X / Y |
| Documented Length | 677 mm |
| Related Version | 03090202-01 – MS22 X/Y 950 mm |
| Main Selection Risk | Choosing by MS22 family name while overlooking the documented 677 mm / 950 mm distinction |
Fitting a 677 mm measuring system with the 950 mm MS22 version will not complete the feedback repair — shared MS22 family designation does not guarantee interchangeability. This triggers a second sourcing cycle, keeps the machine out of service, and extends production downtime well beyond the original maintenance scope.
Factories stocking both versions should label the measuring length directly with the spare. When the service record only says “MS22,” compare the removed RSF/SIPLACE label and installed measuring-system configuration before releasing the part from inventory.