A custom compatible replacement for ASS58N-F2AAARHGN-0016 can be supplied by EncoderWorks with the main check placed on Gray-code SSI pin mapping, H-option verification, and 16-bit singleturn scaling. This model should not be treated like the 13-bit version or the R0 connector version. The M23 connection, option segment, Gray decoding, and 65536-step word length must all match the original installation.
The ASS58N-F2AAARHGN-0016 is an SSI singleturn absolute encoder configuration with Gray code, 16-bit singleturn resolution, 4.5–30 VDC supply, aluminum housing execution, Ø12 mm x 30 mm recessed hollow shaft, 12-pin M23 connector, and radial exit. It should be handled as singleturn angle feedback, not as a multiturn encoder.
The first failure boundary is SSI connector accuracy. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If the M23 pin assignment is copied incorrectly, reserved pins are used, or the H option is assumed without verification, the SSI frame can be stable while the decoded shaft angle is wrong.
This replacement fails when SSI communication is present, but the PLC reads the wrong singleturn position because M23 pin mapping, Gray decoding, 16-bit word length, H-option behavior, PRESET 1 input, or V/R direction state does not match the original encoder. That is a signal-chain and option-matching failure, not simply a sensing failure.
The second boundary is Ø12 mm recessed-shaft installation. The shaft is not solid and not a simple through bore. The machine shaft must enter within the 15–30 mm insertion range, while the torque rest prevents housing rotation without radial, axial, or angular preload.
The replacement decision should first confirm Gray SSI format, 16-bit singleturn mapping, radial M23 pin assignment, H-option requirement, Clock/Data differential wiring, 20 ±10 µs monoflop behavior, V/R direction input, PRESET 1 zero-set logic, 4.5–30 VDC supply, Ø12 mm recessed shaft fit, insertion depth, torque rest contact, shield grounding, and offset limits. EncoderWorks treats ASS58N-F2AAARHGN-0016 as an industrial encoder custom compatible solution where 16-bit SSI word accuracy and option-specific matching decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | ASS58N-F2AAARHGN-0016 |
| Encoder type | Singleturn absolute encoder |
| Interface | SSI / RS422 |
| Resolution | 16-bit singleturn |
| Position range | 65536 steps per revolution |
| Code | Gray |
| Supply voltage | 4.5–30 VDC |
| Transfer rate | 0.1–2 MBit/s |
| Housing execution | Aluminum, powder coated |
| Shaft type | Recessed hollow shaft |
| Shaft size | Ø12 mm x 30 mm |
| Connection | 12-pin M23 connector |
| Exit position | Radial |
| Option point | H option, verify against original unit |
| Control inputs | V/R direction, PRESET 1 zero-set |
| Main engineering anchor | Gray SSI and H option |
| Main failure boundary | Wrong M23 pin mapping, option mismatch, preset fault, shaft insertion error |
