A20B-0008-0471
Fanuc A20B-0008-0471 Add Axis (RES) controller PCB for the Fanuc 6 control. This pcb allowed a 4th axis control on all the Fanuc 6 control system series, as well as resolver feedback. This board has DIN connectors for various types of resolver or inductosyn feedback.
This is for feedback such as linear scales for higher levels of precision. Surplus spares are stock dependent.

