FANUC A20B-3300-0070 486DX2 CPU Card for i Series CNC Controls

Verified A20B-3300-0070 Processor Type

The FANUC A20B-3300-0070 is a 486DX2 CPU card used in FANUC i Series CNC hardware. FANUC Model A documentation lists it as a CPU-card option for CNC control, while other documented board arrangements use the same part number for PMC, communication and conversational-control functions.

It is an industrial CNC circuit card, not a desktop processor or general-purpose computing module. Its role depends on the installed motherboard or option board.

CNC and Auxiliary-Board Functions

FANUC hardware tables document A20B-3300-0070 in CNC-control and loader-control arrangements. They also show it on C-language, serial-communication and conversational-function boards. A buyer must therefore identify the original board position as well as the CPU-card number.

DRAM Module Must Be Checked Separately

In documented PMC/communication/conversational configurations, a separate DRAM module is mounted on the CPU card. Do not assume that a photographed A20B-3300-0070 includes the required DRAM module or that every attached memory configuration is equivalent.

• Match the complete A20B-3300-0070 drawing number
• Confirm the CNC generation and original card-mounting position
• Compare PCB edition, suffix, connectors and fitted DRAM module
• Do not substitute a Pentium CPU card solely because the connector appears similar

Order a Tested FANUC 486DX2 CPU Card

Browse FANUC PCBs or FANUC CNC and robot parts. Send photos of both sides and the hardware markings for model checking.

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