The Fanuc A20B-8001-0970 is a specialized interface PCB (often /01A variant) designed for Fanuc Series 16i/18i/21i Model A CNC systems. It serves as the MMX Pentium PC interface connector board, enabling high-speed serial data transfer via HSSB (High-Speed Serial Bus) for seamless communication between the CNC control unit and external PC or ISA expansion units. This chassis-mount module features robust industrial-grade connectors (including ribbon cable support), integrated logic circuitry for reliable signal routing, and low-power operation on system-supplied voltages. [stock available]