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| Place of Origin | JAPAN |
| Brand Name | FANUC |
| Certification | CE ROHS |
| Model Number | A16B-3200-0427 |
The FANUC A16B-3200-0427 is a CPU-side control board used as the main CPU board in 16i / 160i Model B control configurations.
It is also described as an i-B stand-alone control main CPU PCB and as a separate CPU board, which places it squarely in the processor layer of the CNC rather than the I/O, display, or servo interface section.
This is the board that matters when the control processor itself is the focus of the repair.
One key detail associated with this model is that reloading parameters and programs is required after replacement, which tells you immediately that it should be treated as a core control board and not as a passive support PCB.
| Item | Details |
|---|---|
| Brand | FANUC |
| Part Number | A16B-3200-0427 |
| Model Number | A16B32000427 |
| Board Type | Main CPU Board |
| CPU Role | Main CPU PCB |
| Control Family | 16i / 160i Model B |
| Control Style | i-B stand-alone control |
| Installation Style | Separate board |
| Replacement Note | Parameters and programs need to be reloaded |
A16B-3200-0427 is best suited to main CPU replacement in compatible FANUC 16i / 160i Model B systems. It fits control restoration, processor-board failure repair, and central-board replacement projects where the existing CNC platform already uses the i-B stand-alone CPU architecture.
Because it is the main CPU board, this model is especially relevant when the machine shows symptoms tied to the processor side of the control rather than to one isolated I/O or interface board.
In these cases, exact board matching matters because the CPU board defines the control platform at the core level.
This board is a strong fit when the installed control already depends on the 16i / 160i-B main CPU structure and the repair requires the same processor-board family to keep the original control architecture intact.
The need to reload parameters and programs after replacement also makes it clear that this is a true system-core board, not a peripheral module.
Q1. What type of board is the A16B-3200-0427?
It is a main CPU board for 16i / 160i Model B controls, also described as an i-B stand-alone control main CPU PCB.
Q2. What does this board do in the system?
Its role is to serve as the processor-side control board at the center of the CNC. Because it is identified as the main CPU PCB, it belongs to the core control logic layer rather than the I/O or display side of the system.
Q3. What should be checked when selecting A16B-3200-0427?
The most important checks are the exact part number, the 16i / 160i Model B control family, and whether the machine uses the i-B stand-alone control layout. Any suffix on the installed label should also be verified before replacement.
Q4. How should the key specification be understood?
“Main CPU” tells you this is the processor board, “16i / 160i Model B” identifies the target control family, and “separate” indicates the board is treated as its own main CPU unit in the control layout. Those points should all line up with the installed machine before replacement.
Q5. How should faults be diagnosed before replacing this board?
A grounded way to approach diagnosis is to separate CPU-level control faults from peripheral-board faults. If the machine shows broader control problems rather than one isolated I/O or interface issue, the main CPU board becomes a stronger candidate. Since this model requires reloading parameters and programs after replacement, backup readiness should also be confirmed before the board is changed.
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