FANUCSeries 15 / 15A Buffer 2 Remote Buffer and Memory Board, Edition 04B, 2 to 8 Axis, E1/F1/G1 DNC

Product Description

What this part is

A Fanuc Buffer 2 printed circuit board for the Series 15 / 15A CNC, hardware edition 04B. It is the memory and data-buffering card in the control rack: it carries system memory, the PMC ladder and stored part programs, and it buffers the block-by-block data flow between memory and the CNC processor. Its second job is remote buffering for DNC — feeding blocks fast enough from a host or DNC link that a machine running dense toolpaths never starves mid-cut. It supports 2 to 8 axis configurations and works with the E1 / F1 / G1 high-speed serial interfaces.

Decoding the order code

A16B — Fanuc populated printed circuit board family.

2200 — board group covering Series 15 / 15A processor and peripheral cards.

0410 — the specific card: Buffer 2 / remote buffer and memory board.

/04B — hardware edition, stamped on the board.

What these specs mean in practice

Remote buffering is what makes high-feed DNC work. Without a buffer card of adequate capacity a Series 15 dripping a large program over a serial link will pause between blocks and leave witness marks on a finished surface. The card is also where the ladder lives, so a failed buffer board can present as a PMC alarm or as lost programs rather than as an obvious hardware fault. Axis count matters: this card supports up to 8 axes, so it is the right tier for a multi-axis mill or a lathe with sub-spindle, not just a two-axis machine.

Published specifications

Type: Buffer 2 (remote buffer / memory) printed circuit board.

Platform: Fanuc Series 15 and 15A CNC.

Axis support: 2 to 8 axes.

Holds: system memory, PMC ladder, part programs.

Serial interfaces supported: E1 / F1 / G1 high-speed communication for DNC.

Order code: A16B-2200-0410, hardware edition 04B.

Format: rack-mounted plug-in card with backplane edge connector.

Quantity and configuration

One printed circuit board.

What is not included

Board only. No control rack, backplane or card cage. No main CPU board, axis card or graphic board. No memory cartridge, ROM or flash modules, no option cards. No memory backup battery. No DNC, serial or ribbon cables and no connector kits. No ladder file, parameter backup or programs. No documentation.

Interchange guidance

A16B-2200-0410, A16B22000410 and A16B 2200 0410 are the same order code. Edition variants including /03B and /04B share the order code and are commonly listed as an additional buffer board. Other 2200-group cards are different functions — A16B-2200-0510 is the graphic board, A16B-2200-0200 the RG2 main CPU — and none of them will do this card’s job. Fanuc control boards are proprietary with no cross-brand equivalent.