Fanuc A20B-3300-0632 B2 servo card. This Fanuc axis card is a B2 type for the 0i-D control systems. Normally fitted with ahte A20B-8200-054x series of main boards. Though confusingly part of the A02B-0319-B502 system number which covers 10 years of 0i-D development.
DNC currently have these FSSB B2 axis servo controller PCB in stock; fault finding and testing is available.