E4809-045-086-A Okuma
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The Okuma E4809-045-086-A is part of the E4809 CNC Boards series and offers display support for color graphics. This board supports bubble card sizes ranging from 128 Kbyte up to 16 Mbit, with a maximum bubble memory of 32 Mbits. It also supports a maximum RAM of 2 Mbytes, with standard RAM at 0.5 Mbyte.
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Product Description:
The E4809-045-086-A is a memory and graphics controller board produced by Okuma within the E4809 CNC Boards series. Installed inside OSP numerical control racks, the board integrates volatile and nonvolatile storage with display handling so that machining programs, offsets, and operator screens are stored and refreshed without external PCs. In automation cells, it links the central processor to the operator panel, enabling steady data throughput between servo logic and the color CRT or LCD used for setup and cycle monitoring. It occupies one backplane slot and draws low-voltage power from the control cabinet.
Base memory on the board is 0.5 Mbyte, providing capacity for system software and small part programs. The DRAM sockets accept modular cards with capacities of 0.5, 1.0, or 1.5 Mbytes, and the total volatile memory capacity reaches 2 Mbytes. Nonvolatile storage uses bubble memory technology. Plug-in media are available with capacities of 128 Kbytes or 1, 2, 4, 8, 12, and 16 Mbits, while the controller can address up to 32 Mbits. Bubble memory retains tool data when power is removed, while onboard logic refreshes the dynamic RAM during operation. The two memory banks serve different purposes: bubble cards store infrequently changed files, and RAM provides a high-speed working area for execution loops.
The board directly drives the human-machine interface. Its color display support allows multicolor machining paths and alarm codes to be rendered without external video hardware, while integrated graphics support overlays tool vectors on dimensional grids during manual or automatic operation. System software maps display pages into shared RAM so that axis feedback can be updated with minimal CPU overhead. Dedicated video registers keep raster timing synchronized with the controller’s display output. Expandable DRAM provides working space for active machining routines and changing screen data, while solid-state bubble memory retains boot images and program information after shutdown. This arrangement allows complex program blocks, large offsets, and pattern shifts to remain available while live graphics are refreshed at the operator panel.
