For ASM58N-F2AAAR0BN-1212, EncoderWorks can provide a custom compatible replacement focused on binary SSI pin mapping, 12/12-bit position scaling, and Ø12 mm recessed hollow-shaft installation. This model should not be treated like the Gray-code version or the K1 cable version. The same housing style can still fail if binary decoding, M23 pin assignment, preset behavior, or recessed-shaft seating is not reproduced.
The ASM58N-F2AAAR0BN-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, Ø12 mm x 30 mm recessed hollow shaft, 12-pin M23 connector, and radial exit. The controller should continue reading 4096 steps per revolution across 4096 turns.
The first failure boundary is SSI connector accuracy. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If the M23 pinout is copied incorrectly, or if reserved pins are treated as usable signals, the SSI word can become shifted, unstable, or correctly transmitted but wrongly decoded as position.
This replacement fails when SSI communication is present, but the PLC reads the wrong position because M23 pin assignment, binary decoding, 12/12-bit word length, monoflop timing, or shield grounding does not match the original encoder. That is a signal-chain and parameter 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 Ø12 mm recessed hollow shaft must enter within the 15–30 mm insertion range, and the torque rest must prevent 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, radial M23 pin assignment, 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 ASM58N-F2AAAR0BN-1212 as an industrial encoder custom compatible solution where SSI pin accuracy and binary word scaling decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | ASM58N-F2AAAR0BN-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 | Ø12 mm x 30 mm |
| Connection | 12-pin M23 connector |
| Exit position | Radial |
| Control inputs | V/R direction, PRESET 1 zero-set |
| Main engineering anchor | Binary SSI and M23 connector |
| Main failure boundary | Wrong M23 pin mapping, binary decoding error, preset fault, shaft insertion error |
