The FANUC A20B-8001-0730 is an industrial-grade High-Speed Serial Bus (HSSB) Interface Board / Fast Ethernet Module engineered for premium FANUC Series 15i, 16i, 18i, and 21i CNC control backplanes (specifically supporting Model A and Model B system generations). This multi-layer option card serves as a high-bandwidth communication link, utilizing a specialized fiber-optic transceiver network (typically featuring a COP7 optical port setup) to establish real-time, bidirectional data routing. It bridges the core CNC processor assembly with external data servers, industrial factory networks, or a host PC running Open CNC software (such as FANUC FOCAS1/FOCAS2 drivers) for high-speed part program transfers and monitoring. [stock available]