A custom compatible replacement for ASM58N-F2AAAR0GN-1213 can be supplied by EncoderWorks with the main check placed on Gray-code SSI pin mapping, 12/13-bit position scaling, and Ø12 mm recessed hollow-shaft installation. This model should not be treated like the K1 cable version. The M23 connector changes the field risk from conductor tracing to pin assignment, plug orientation, reserved contacts, and shield continuity.
The ASM58N-F2AAAR0GN-1213 is an SSI multiturn absolute encoder configuration with Gray code, 12-bit singleturn resolution, 13-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 8192 turns.
The first failure boundary is SSI connector mapping. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs. If the M23 pinout is copied incorrectly, or if reserved pins are connected as active conductors, the SSI frame can be shifted, unstable, or decoded as the wrong Gray position.
This replacement fails when SSI communication is present, but the PLC reads the wrong position because M23 pin assignment, Gray decoding, 12/13-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 range, and the torque rest must stop housing rotation without creating radial, axial, or angular preload.
The replacement decision should first confirm Gray SSI format, 12-bit singleturn and 13-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-F2AAAR0GN-1213 as an industrial encoder custom compatible solution where SSI pin accuracy and Ø12 recessed-shaft mechanics decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | ASM58N-F2AAAR0GN-1213 |
| Encoder type | Multiturn absolute encoder |
| Interface | SSI / RS422 |
| Resolution | 12-bit singleturn + 13-bit multiturn |
| Position range | 4096 steps x 8192 turns |
| 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 |
| Control inputs | V/R direction, PRESET 1 zero-set |
| Main engineering anchor | Gray SSI and M23 connector |
| Main failure boundary | Wrong M23 pin mapping, Gray decoding error, preset fault, shaft insertion error |
