1 PC Used Fanuc A20B21000160 PC Board In Good Condition A20B-2100-0160 A20B21000160

FANUC A20B-2100-0160 | Power Mate D CNC Base Control PCB — Main Motherboard / SMD Module Host / Discontinued

Power Mate D — One Board at the Centre of Everything

The A20B-2100-0160 is the base motherboard for FANUC's Power Mate D (and closely related Model O) CNC system — the single PCB that anchors the entire Power Mate D's control architecture. Axis control, I/O management, PMC execution, and programme processing all run through or depend on this board. It is not a sub-function card; it is the host that every other functional card in the Power Mate D plugs into.

The board's modular architecture accepts a set of SMD (Surface Mount Device) daughter modules that configure the Power Mate D for specific machine applications. Common SMD modules for this board include a spindle control module (A20B-2902-035x series), a touch panel controller (A20B-2902-0470), a PMC ladder module (A20B-2900-0142), and an I/O control module (A20B-2001-0901). The base board provides the backplane bus; the daughter modules determine what the complete system can do. A Power Mate D stripped to this board alone cannot operate — the SMD modules are part of the functional system.

Replacing the A20B-2100-0160 means transferring each daughter module from the failed board to the replacement — or ensuring the replacement is supplied with matching modules pre-installed. The daughter modules carry specific machine configuration data; their presence and correct configuration is as critical to the replacement outcome as the base board itself.

Key Specifications

Power Mate D Context — Compact CNC for Peripheral Control

The Power Mate D is FANUC's compact CNC controller for machine peripherals and auxiliary axis control — applications where a full CNC axis count is not needed but dedicated closed-loop servo control is required. Peripheral devices, robot positioners, pallet transport axes, and tool-change indexers are typical Power Mate D applications. The compact form factor with the A20B-2100-0160 as its base hardware makes it suitable for integration within machine control cabinets where space is limited.

FAQ

Q1: What daughter modules must be transferred when replacing the A20B-2100-0160?

All SMD modules fitted to the original board must be transferred — spindle control, PMC ladder, I/O module, and any other function modules installed. Each module carries its function configuration. The base board alone without these modules cannot run the machine. Transfer each module carefully, confirm its seating, and verify system function at startup before returning the machine to production.

Q2: Does the PMC ladder programme need to be reloaded after replacing the A20B-2100-0160?

The PMC ladder is stored in the PMC module (A20B-2900-0142 type) plugged into the base board, not in the base board itself. If the PMC module is transferred intact from the original board, its ladder programme transfers with it. If the PMC module is also replaced, the ladder programme must be reloaded from backup.

Q3: What CNC series is compatible with the A20B-2100-0160?

The A20B-2100-0160 is the base board for the Power Mate D and related Model O configurations (e.g., A02B-0166-B591 complete unit). It is not compatible with standard CNC machining centre or turning centre configurations in the 0i or 16i/18i families — the Power Mate is a distinct, compact controller platform for peripheral and auxiliary axis applications.

Q4: The Power Mate D fails at startup with no display. Can the A20B-2100-0160 be the cause?

A complete startup failure — no display, no LED activity — points to either the base board's power supply stage or the main CPU failing to initialise. Check the incoming DC supply voltages at the board's power connector first. If power is confirmed and the board still does not initialise, the A20B-2100-0160 or its power supply section requires replacement or repair.

Q5: Where is the A20B-2100-0160 sourced after discontinuation?

Through the FANUC Power Mate parts aftermarket — FANUC Power Mate specialist dealers, CNC repair centres, and tested surplus suppliers. Many suppliers offer complete tested Power Mate D units rather than bare base boards, because the board alone without its daughter modules cannot be functionally verified. Confirm the board includes the required SMD modules before accepting a supplied unit.