Fanuc BMU Series A87L-0001-0084 pcb

The Fanuc A87L-0001-0084 is a Bubble Memory Unit (BMU), a memory board featuring 128 kilobytes of non-volatile bubble memory. The key advantage of this technology is that stored data is fully retained even when power is removed. The board serves as the central program and data storage medium within the associated CNC control system. The BMU board A87L-0001-0084 belongs to the Fanuc System 11 Model A and is designed for use in the Fanuc System 11M and Fanuc System 11T CNC controls. Within these systems, it functions as the main memory and is an essential component for the operation of the control unit. The board is designed as a 320-meter Bubble Memory Unit and is characterized by its non-volatile memory, which prevents any data loss in the event of a power failure. In addition to the standard 128 KB variant, configurations of 512 KB are also technically feasible, and – with the appropriate software configuration of System 11 – capacities of 1 MB and up to 2 MB can be realized. The board weighs 0.92 kg and measures 42 × 28 × 5 cm.