FANUC A20B-3300-0813 is a C12 servo card / CNC axis card used in selected FANUC Series 30i-B, 31i-B, 32i-B and 0i-F control units. It supports servo-related processing and communication with the machine’s motion-control system.

FANUC references identify A20B-3300-0813 as servo card C12 with board ID 00159. “C12” is a FANUC card-configuration designation, not a twelve-axis rating. Compatibility depends on the complete CNC model, main board, CPU and software configuration.

A20B-3300-0813 Product Information

Servo and Axis-Control Role

The A20B-3300-0813 supports communication and processing between the numerical control and compatible motion components. A suspected fault may be associated with servo communication alarms, axis initialization problems or failure of the CNC to recognize the installed servo-card configuration.

C12 and Related Servo Cards

A20B-3300-0813 belongs to a family that includes A20B-3300-0811, 0812, 0814 and other servo-card specifications. These boards have different configuration identifiers and system requirements. They should not be substituted based on connector position or similar appearance.

Compatibility and Data Checks

Confirm the actual A20B-3300-0813 label, PCB revision and board ID 00159. Also verify the full A02B CNC number, main board, CPU card, memory, card slot and software options. Back up parameters, programs, offsets and PMC data before control-unit service.

Testing and Installation Notes

REACO CNC checks the label, revision, connectors, components, solder condition, CNC recognition and servo communication where applicable. Handle the card with anti-static protection and install it only with machine power isolated. Parameter or system initialization may be required.

Related resources: FANUC CNC circuit boards and FANUC CNC repair services.