For BMMH58S1N24C12/13P2A, EncoderWorks can provide a custom compatible replacement focused on binary SSI M23 mapping, 10–30 VDC signal compatibility, and Ø12 mm blind hollow-shaft seating. This model should not be treated like the Gray-code version with the same shaft and connector layout. The mechanical form may match, but binary code changes the controller interpretation risk if the SSI word length, bit order, or programmed receiver setting is not reproduced.
The BMMH58S1N24C12/13P2A is a magnetic SSI multiturn absolute encoder configuration with 12-bit singleturn resolution, 13-bit multiturn range, binary code, and 10–30 VDC SSI supply. The P2A suffix should be checked as an IP65, Ø12 mm blind hollow shaft, radial M23 connector execution against the original label, connector style, and mounting drawing.
The first failure boundary is binary SSI interpretation. Clock+ / Clock- and Data+ / Data- must remain true differential pairs, and the controller must read the same 12/13-bit SSI frame as before. If the cabinet is configured for Gray code, or if the data word is shifted by one bit, the position can be stable but wrong.
This replacement fails when SSI communication is present, but the PLC reads the wrong multiturn position because M23 pin mapping, Clock/Data pair assignment, binary-code interpretation, or SSI word length does not match the original encoder. The encoder may be functional while the signal chain is wrong.
The second boundary is Ø12 mm blind hollow-shaft seating. A blind hollow shaft is not a through bore. The machine shaft must enter to the correct depth, remain inside the clamping zone, and avoid bottoming inside the encoder. Incorrect insertion can preload the bearing system or weaken clamping reliability.
Zero setting must also be protected. The zero input can shift the electrical reference within the encoder resolution. If this input is triggered during wiring or tied to the wrong level, the controller can receive a clean but offset binary position value.
The replacement decision should first confirm P2A suffix execution, Ø12 mm blind hollow-shaft fit, insertion depth, IP65 requirement, radial M23 connector layout, 10–30 VDC SSI supply, 12-bit singleturn and 13-bit multiturn mapping, binary code setting, Clock/Data differential pair wiring, 120 Ω data termination, zero input behavior, shield grounding, torque support, and shaft seating. EncoderWorks treats BMMH58S1N24C12/13P2A as an industrial encoder custom compatible solution where binary SSI mapping and Ø12 blind-shaft mechanics decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | BMMH58S1N24C12/13P2A |
| Encoder type | Multiturn absolute encoder |
| Interface | SSI |
| Sensor technology | Magnetic |
| Resolution | 12-bit singleturn + 13-bit multiturn |
| Code | Binary |
| Supply voltage | 10–30 VDC |
| Signal standard | SSI clock input, RS422 data output |
| Shaft type | Blind hollow shaft, not through hollow |
| Shaft size | Ø12 mm |
| Connection | Radial M23 connector |
| Protection class | IP65 |
| Control input | Zero setting input |
| Main engineering anchor | Binary SSI M23 and Ø12 blind shaft |
| Main failure boundary | Wrong binary decoding, M23 mapping error, zero-set error, blind-shaft seating error |
