Fanuc operator PCB. The various op boards communicated behind the keyboard to the CNC via assignment in the ladder. DNC stock operator cards from SERIES 0, all models A, B, C, D, F from 2 / 3 / 4 / 5 / 6 axis and more. As well from series 15, 16, 18, 20, 21, 16i, 18i, 21i and more operator boards.