For ASM58N-F1AK1R0GN-1212, EncoderWorks can provide a custom compatible replacement focused on Gray-code SSI mapping, 12/12-bit position scaling, and Ø10 mm recessed hollow-shaft installation. This model should not be treated as a solid-shaft encoder, a normal through-bore encoder, or a generic SSI replacement. The key failure boundary is whether the controller receives the same Gray-coded absolute word while the shaft is inserted and supported within the correct mechanical range.
The ASM58N-F1AK1R0GN-1212 is an SSI multiturn absolute encoder configuration with Gray code, 12-bit singleturn resolution, 12-bit multiturn range, 4.5–30 VDC supply, aluminum housing execution, Ø10 mm x 30 mm recessed hollow shaft, K1 1 m cable connection, and radial cable exit. The replacement should preserve 4096 steps per revolution and 4096 turns, not only the same connector or housing size.
The first failure boundary is SSI signal integrity. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If cable conductors are copied only by color, or if shield grounding and clock pause are not controlled, the controller may receive a shifted, unstable, or wrongly decoded absolute value.
This replacement fails when SSI communication is present, but the PLC reads the wrong position because Clock/Data pair assignment, Gray-code decoding, 12/12-bit word length, monoflop timing, or cable shielding does not match the original encoder. That is a signal-chain and parameter failure, not simply a sensor failure.
The second boundary is control input behavior. V/R changes the counting direction, while PRESET 1 can reset the electrical reference. If the preset line is triggered during wiring, or if the direction input is held differently from the original machine, the encoder can send clean SSI data with the wrong zero point or rotation sense.
Mechanically, the Ø10 mm recessed hollow shaft must not be installed like a solid shaft. The machine shaft must enter within the proper insertion depth, and the torque rest must prevent housing rotation without creating radial, axial, or angular preload.
The replacement decision should first confirm Gray SSI format, 12-bit singleturn and 12-bit multiturn mapping, K1 radial cable assignment, Clock/Data differential wiring, 20 ±10 µs monoflop behavior, V/R direction input, PRESET 1 zero-set logic, 4.5–30 VDC supply, Ø10 mm recessed shaft fit, 15–30 mm insertion depth, torque rest contact, shield grounding, and offset limits. EncoderWorks treats ASM58N-F1AK1R0GN-1212 as an industrial encoder custom compatible solution where SSI word accuracy and recessed-shaft mechanics decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | ASM58N-F1AK1R0GN-1212 |
| Encoder type | Multiturn absolute encoder |
| Interface | SSI / RS422 |
| Resolution | 12-bit singleturn + 12-bit multiturn |
| Position range | 4096 steps x 4096 turns |
| Code | Gray |
| Supply voltage | 4.5–30 VDC |
| Housing execution | Aluminum, powder coated |
| Shaft type | Recessed hollow shaft |
| Shaft size | Ø10 mm x 30 mm |
| Connection | K1 cable, 1 m |
| Exit position | Radial |
| Control inputs | V/R direction, PRESET 1 zero-set |
| Main engineering anchor | Gray SSI and Ø10 recessed shaft |
| Main failure boundary | Wrong SSI pair mapping, Gray decoding error, preset fault, shaft insertion error |
