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FANUC A16B-2203-0331 is a spindle control PCB for Alpha SPM-5.5 and SPM-11 amplifier modules. FANUC documents it for compatible A06B-6078-H206#H500 and A06B-6078-H211#H500 spindle drives.
The board works with different power/wiring boards according to the amplifier size and CE configuration. Confirm the complete drive model, PCB edition, ROM and installed power board before replacement.
A16B-2203-0331 Product Information
| Brand | FANUC |
| Model / MPN | A16B-2203-0331 |
| Series | FANUC Alpha SPM spindle amplifier series |
| Product Type | Spindle control PCB / plug-in control board |
| SPM-5.5 Host | A06B-6078-H206#H500 |
| SPM-11 Host | A06B-6078-H211#H500 |
| CE Power Boards | A16B-2202-0681 for SPM-5.5; A16B-2202-0682 for SPM-11 |
| Non-CE Power Boards | A16B-2202-0471 for SPM-5.5; A16B-2202-0472 for SPM-11 |
| Earlier Control PCB | A16B-2202-0431 |
| Program ROM | A06B-6072-H500, 9D00 or 9D0A series |
| Drive Type | Type-1 Alpha spindle amplifier, standard specification |
| Status | Discontinued by manufacturer; stock subject to availability |
| Condition | New, refurbished, or used 90% new; subject to stock |
| Testing | 100% tested before shipping; test video available |
| Handling | Normally 1–2 business days |
| Shipping / ETA | DHL, UPS, or FedEx worldwide; typically 3–7 business days |
| Warranty | 1 year for new/refurbished; 3 months for used 90% new |
| Service / Packing | Free technical support; anti-static reinforced packing |
Alpha SPM Spindle-Control Functions
A16B-2203-0331 provides the control platform for compatible Alpha SPM modules. It processes spindle commands, feedback and protective functions while working with the separate power board and the installed spindle software ROM.
SPM-5.5 and SPM-11 Hardware Matching
The same control-board number can be installed in SPM-5.5 or SPM-11 assemblies, but the power board changes with the amplifier capacity and CE specification. Confirm A16B-2202-0681, 0682, 0471 or 0472 on the original assembly rather than treating the complete drives as interchangeable.
ROM, Revision and Testing Notes
A16B-2202-0431 is the documented earlier control-board specification. Check the full A16B number, printed edition, A06B-6072-H500 ROM labels and drive suffix. REACO CNC tests connectors, ROM, spindle feedback, alarms and operation in a compatible SPM setup as applicable.
Related resources: FANUC circuit boards, FANUC spindle amplifiers and FANUC spindle drive repair services.
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