Fanuc A20B-1003-0230 Backplane. This PCB is a series 15 control motherboard with Fibre Optic which acts as a master PCB to the entire Fanuc 15 system. The board connects the BASE0, BASE1, BASE2, Graphics, Axis board(s) too allow from 2-8 axis control on the smaller and simpler FS-15 controls, up to seriously large configurations. DNC have four Fanuc 15 control systems, a run of the mill 15T and 15M, a 15TF and a 15iM stand alone test rig built by GE Fanuc HQ before their disbandment by Fanuc and General Electric. Belonged to A02B-0094-B502 system.
This system 15 backplane is available from DNC today either as exchange, or testing and repair can be carried out on this part, or the other Fanuc 15 parts such as Graphics and axes PCB.