03126149 is a control board with very little public information behind it. What can be confirmed is a 6-layer FR4 board, 1.0mm thickness, 1oz copper, 0.075mm minimum trace width and spacing, 0.15mm minimum hole size, ENIG surface finish, blue solder mask with white silkscreen — standard industrial control board construction, not a simple adapter.
That said, this number does not appear in ASM's official SIPLACE X series service manuals. The I/O control unit in that family is 03116049-xx, backward compatible with 03052315-xx, and 03126149 sits outside that sequence — so it most likely belongs to a specific generation or machine model's function board. Which one exactly, public sources do not say.
On the market, the board circulates as both new and used pulled stock, generally listed as "100% tested" and described by suppliers as an ASM placement machine control board or High Accuracy Control Board, pointing to SMT lines and Siemens placement machine spares.
The awkward part is there is no published interface definition or DIP switch documentation, so pre-configuration checks cannot be done from reference material before swapping the board. The price gap between used and new can be significant, and it is worth verifying the full suffix on the physical label — -01, -02 and similar revisions may correspond to different hardware versions.

ASM 03126149 Control Board Specifications
| Part Number | 03126149 |
|---|---|
| Part Type | Electronic control board / control card |
| Brand | ASM SIPLACE |
| Application | ASM SMT equipment electronic control system |
| Subsystem | Confirm from the installed machine position and original board label |
| Primary Matching Data | Complete P/N, PCB layout, connector arrangement and installed position |
| Replacement Decision | Do not substitute a similar-looking SIPLACE board without confirming the exact application |