When replacing ASM58N-F3AK1RKBN-1212, the EncoderWorks custom compatible replacement should first control binary SSI cable mapping, K-option verification, and Ø15 mm recessed hollow-shaft installation. This model should not be treated like the Ø10 or Ø12 versions. The larger recessed bore changes shaft seating, while the K option segment must be confirmed against the original label, wiring requirement, or machine drawing before production.
The ASM58N-F3AK1RKBN-1212 is an SSI multiturn absolute encoder configuration with binary code, 12-bit singleturn resolution, 12-bit multiturn range, 4.5–30 VDC supply, aluminum housing execution, Ø15 mm x 30 mm recessed hollow shaft, K1 1 m cable connection, and radial cable exit. The controller should continue reading 4096 steps per revolution across 4096 turns.
The first failure boundary is SSI cable accuracy. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If the cable is copied only by color, or if the K-option behavior is assumed instead of verified, the SSI word can become shifted, unstable, or decoded as the wrong binary position.
This replacement fails when SSI communication is present, but the PLC reads the wrong position because Clock/Data pair assignment, binary decoding, 12/12-bit word length, monoflop timing, K-option behavior, or cable shielding does not match the original encoder. That is a signal-chain and option-matching failure, not simply a sensor failure.
The second boundary is input and shaft behavior. V/R changes counting direction, while PRESET 1 can reset the electrical reference. The Ø15 mm recessed hollow shaft must enter within the 15–30 mm insertion range, and the torque rest must stop housing rotation without creating radial, axial, or angular preload.
The replacement decision should first confirm binary SSI format, 12-bit singleturn and 12-bit multiturn mapping, K1 1 m radial cable assignment, K-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, Ø15 mm recessed shaft fit, insertion depth, torque rest contact, shield grounding, and offset limits. EncoderWorks treats ASM58N-F3AK1RKBN-1212 as an industrial encoder custom compatible solution where SSI cable accuracy and option-specific matching decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | ASM58N-F3AK1RKBN-1212 |
| Encoder type | Multiturn absolute encoder |
| Interface | SSI / RS422 |
| Resolution | 12-bit singleturn + 12-bit multiturn |
| Position range | 4096 steps x 4096 turns |
| Code | Binary |
| 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 | Ø15 mm x 30 mm |
| Connection | K1 cable, 1 m |
| Exit position | Radial |
| Option point | K option, verify against original unit |
| Control inputs | V/R direction, PRESET 1 zero-set |
| Main engineering anchor | Binary SSI and K option |
| Main failure boundary | Wrong SSI pair mapping, option mismatch, preset fault, shaft insertion error |
