Fanuc axis pcb (control system). Fanuc CNC system servo control pcbs start with analog, digital, serial type-a, type-b, FSSB pcb’s. Except FSSB, the older boards dependent on control system generation control either a single, dual, triple and in the case of the Fanuc 0-C, 0-D, 0-F and 15 controls and later four channels. DNC supports the systems and the axis controller boards from SYSTEM 6, 10, 11, 15, 0A, 0B, 0C, 16, 18, 21, i controls.