For BMMH 58S1G24C12/13PAN, EncoderWorks can provide a custom compatible replacement focused on Gray-code SSI M12 mapping, IP65 protection, and Ø14 mm blind hollow-shaft seating. This model should not be treated as a through-hollow-shaft encoder. The PAN suffix should be checked as an IP65, Ø14 mm blind hollow shaft, radial M12 connector execution before production approval.
The BMMH 58S1G24C12/13PAN is a magnetic SSI multiturn absolute encoder configuration with 12-bit singleturn resolution, 13-bit multiturn range, Gray code, and 10–30 VDC SSI supply. Its replacement risk is different from P25 cable versions because the M12 connector moves the main check to pin mapping, differential pair continuity, zero input handling, and connector shielding.
The first failure boundary is M12 SSI assignment. Clock+ / Clock- and Data+ / Data- must remain true RS422 differential pairs from the encoder to the controller. The M12 interface also includes supply, 0 V, zero input, and a do-not-use contact. If the do-not-use pin is connected, or if the SSI pairs are crossed, the controller may read unstable or shifted multiturn values.
This replacement fails when SSI communication is present, but the PLC reads the wrong absolute position because M12 pin mapping, Clock/Data pair assignment, Gray-code interpretation, or data termination does not match the original installation. The encoder may be functional while the signal chain is wrong.
The second boundary is Ø14 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 out inside the encoder. If the shaft is inserted too deeply or too shallowly, the bearing system can be preloaded and position stability can suffer.
Zero setting must also be protected. The zero input can shift the electrical reference within the encoder resolution. If it is triggered during wiring or tied to the wrong level, the machine can receive a stable but offset position value.
The replacement decision should first confirm PAN suffix execution, Ø14 mm blind hollow-shaft fit, insertion depth, IP65 requirement, radial M12 connector layout, 10–30 VDC SSI supply, 12-bit singleturn and 13-bit multiturn mapping, Gray code setting, Clock/Data differential pair wiring, 120 Ω data termination, zero input behavior, shield grounding, torque support, and shaft seating. EncoderWorks treats BMMH 58S1G24C12/13PAN as an industrial encoder custom compatible solution where M12 SSI mapping and Ø14 blind-shaft mechanics decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | BMMH 58S1G24C12/13PAN |
| Encoder type | Multiturn absolute encoder |
| Interface | SSI |
| Sensor technology | Magnetic |
| Resolution | 12-bit singleturn + 13-bit multiturn |
| Code | Gray |
| Supply voltage | 10–30 VDC |
| Signal standard | SSI clock input, RS422 data output |
| Shaft type | Blind hollow shaft, not through hollow |
| Shaft size | Ø14 mm |
| Connection | Radial M12 connector |
| Protection class | IP65 |
| Control input | Zero setting input |
| Main engineering anchor | Gray SSI M12 and Ø14 blind shaft |
| Main failure boundary | Wrong M12 pin mapping, zero-set error, blind-shaft seating error, shield fault |
