We manufacture a 1:1 OEM replacement for the ASM58N-F1AK1R0GN-1212 multiturn absolute encoder. The new unit mirrors the original model’s electrical and mechanical parameters, using a 58 mm standard housing with an integrated hollow shaft design. It supports SSI communication with optically isolated RS422 output, ensuring fast, noise-resistant signal transmission. Standard lead time is 10 working days, ideal for clients requiring stable and efficient encoder sourcing.
Offering up to 30 bits of total resolution, this encoder delivers exceptional accuracy across single-turn and multiturn operations. It features zero-set and direction-select functions, making integration into modern automation systems straightforward. Built for heavy-duty performance, it operates reliably in steel plants, process control, and servo applications. Combining robust hardware construction with high-speed serial communication, it serves as a direct drop-in replacement for legacy ASM58 models.
Replacement solution image.


Technical Data
| Parameter | Value |
|---|---|
| General specifications | |
| Detection type | photoelectric sampling |
| Device type | Multiturn absolute encoder |
| Functional safety related parameters | |
| MTTFₐ | 150 a |
| Mission Time (Tₘ) | 20 a |
| L₁₀ₙ | 1.9 E+11 at 6000 rpm and 20/40 N axial/radial shaft load |
| Diagnostic Coverage (DC) | 0 % |
| Electrical specifications | |
| Operating voltage (U₈) | 4.5 … 30 V DC |
| No - load supply current (I₀) | max. 180 mA |
| Time delay before availability (tᵥ) | < 250 ms |
| Linearity | ± 2 LSB at 16 Bit, ± 1 LSB at 13 Bit, ± 0,5 LSB at 12 Bit |
| Output code | Gray code, binary code |
| Code course (counting direction) | cw descending (clockwise rotation, code course descending) |
| Interface | |
| Interface type | SSI |
| Monoflop time | 20 ± 10 μs |
| Resolution | |
| - Single turn | up to 16 Bit |
| - Multiturn | 14 Bit |
| - Overall resolution | up to 30 Bit |
| Transfer rate | 0.1 … 2 MBits |
| Voltage drop (U₈) | - 2.5 V |
| Standard conformity | RS 422 |
| Input 1 | |
| Input type | Selection of counting direction (cw/ccw) |
| Signal voltage | |
| - High | 4.5 … 30 V |
| - Low | 0 … 2 V |
| Input current | < 6 mA |
| Signal duration | min. 100 ms |
| Switch - on delay | < 10 ms |
| Input 2 | |
| Input type | zero - set (PRESET 1) |
| Signal voltage | |
| - High | 4.5 … 30 V |
| Connection | |
| Connector | type 9416 (M23), 12 - pin, type 9416L (M23), 12 - pin |
| Cable | ∅7 mm, 6 × 2 × 0.14 mm², 1 m |
