Fanuc SMD Module are Small Modular Devices for Fanuc control systems. These pcb’s are plugin module boards which plug into various controls. The controls include 15i, 15B, 16A, 16B, 16C, 16i, 18A, 18B, 18C, 18i, 21A, 21B, 21i and others versions. Inclduing various controllers for graphics, CRT or LCD, dual, triple and quad axes control per board. Many memory types and capacities across SRAM, DRAM, FROM architecture; comms and more.