Fanuc A20B-0007-0040 6 I-O board is used with the Fanuc 6, 6A controls in various 6M, 6T configurations dependent on machine tool MFG. This 96/64 PCB from Fanuc was replaced by the later 6 input output PLC board, as it solves a lot of the reliability issues inherent of the A20B-0007-0040 IO board. DNC carry this board in stock exchange to save money, testing and repair of this i-o board on one of our many complete Fanuc 6 control system. Surplus A20B00070040 is possible stock permitting. Exchange and repair carry a 180 day warranty.