ATM90-AUA12x12 SSI Hollow Shaft Encoder Engineering Solution

A custom compatible encoder solution can be provided for ATM90-AUA12x12 in maintenance, retrofit, replacement, and upgrade applications. This configuration is typically used in systems requiring SSI absolute feedback, multiturn position continuity, and through-hollow shaft mounting with a radial M23 plug connection. Typical production lead time: 15 working days. During engineering review, key matching points include SSI data structure, 12 bit × 12 bit resolution, 1/2″ shaft interface, M23 connector layout, and installation continuity under existing field conditions.

Technical Overview of the ATM90-AUA12x12 Encoder

The ATM90-AUA12x12 is a multiturn absolute encoder built on a through-hollow shaft platform with SSI interface. Its coded resolution is 12 bit singleturn combined with 12 bit multiturn, corresponding to 4,096 steps per revolution and 4,096 turns within the ATM90 SSI family. This gives a balanced feedback structure for applications that need both stable angular resolution and practical multiturn position retention.

The platform uses magnetic scanning for singleturn detection and a mechanical gearbox for multiturn counting, allowing operation without battery dependency. The series overview also notes shallow installation depth of about 60 mm together with strong shock and vibration resistance. In retrofit work, compatibility should therefore be reviewed not only at the signal level, but also in terms of multiturn operating principle, maintenance behavior, and mechanical durability in real service conditions.

Custom Solution Photos

Industrial Integration Considerations

The first integration checkpoint is SSI signal continuity. A compatible solution should match the original controller expectations for absolute data format, resolution structure, and signal handling. Since the ATM90 SSI family is programmable, engineering review should also confirm whether the original installation depends on a specific parameter setting rather than only on nominal catalog data.

The second checkpoint is coded resolution consistency. Because this version uses 12 bit × 12 bit structure, the replacement design should preserve both per-turn resolution and multiturn range expected by the control system. A different coded structure may still fit mechanically while changing scaling, position interpretation, or startup behavior at the PLC or motion controller side.

Environmental continuity also matters. The ATM90 series overview specifies operating temperature from –20 °C to +80 °C depending on model and IP65 protection, with shaft-seal-related performance influenced by the installed mating connection. In practice, connector condition and installation quality remain part of the replacement result.

Field Installation and Wiring Notes

For this model, field installation should focus on the radial M23 12-pin plug arrangement. Compared with cable versions, the plug format provides a defined connection interface, but it also requires enough side clearance for connector engagement and maintenance access. In compact machinery, plug orientation and available radial space can directly affect retrofit feasibility.

SSI wiring should preserve signal integrity and shielding continuity. Signal cables should be routed separately from power switching lines where possible, and shield grounding should follow the original field practice. In many field cases, unstable SSI feedback is caused by wiring changes, poor connector seating, or shielding interruption introduced during maintenance rather than by encoder failure itself.

Mechanical installation should focus on the 1/2″ through-hollow shaft interface. Shaft fit, insertion condition, and alignment should be checked before operation. Because the platform is intended for demanding industrial duty, poor mounting quality can shorten service life or weaken vibration performance even if the SSI signal remains present.

Custom Compatible Encoder Solution

A custom compatible encoder solution for ATM90-AUA12x12 typically focuses on:

• SSI signal continuity and parameter consistency
• 12 bit × 12 bit multiturn feedback structure
• 1/2″ through-hollow shaft installation fit
• Radial M23 12-pin plug connection compatibility
• Stable operation under vibration, shock, and temperature variation

These points should be confirmed during engineering review to ensure alignment with the original system configuration.

Lead Time and Custom Development

Typical production lead time: 15 working days.

Custom development usually starts with confirmation of SSI resolution structure, connector layout, shaft size, and installation conditions before final release.

Typical Technical Parameters