Fanuc I/O PCB are a major part of Fanuc control system. DNC carries Input Output boards from Fanuc 0-A, 0-B, 0-C, 0-D, 0i, 6, 10, 11, 12, 15, 16, 16i, 18, 18i, 21, 21i, etc. Covering 40/40, 64/32, 80/56, 96/64, 104/72; see I/O PLC modules for the plugin yellow units.