Product Description:

The E4809-436-072-B is an expansion printed circuit assembly produced by Okuma within the E4809 CNC Boards series. Designed for insertion into OSP control cabinets, the module augments the native motion processor with a dedicated communications path. Its role is to relay program data and status blocks between the machine and plant networks, allowing automated tool paths to load while machining proceeds. In this way, the board supports continuous production scheduling without halting spindle or axis operations. By executing this task at the hardware level, it frees the CPU for interpolation tasks.

This board is classified as an Additional Board, meaning it works alongside the master CPU rather than replacing an existing channel. Its circuitry follows the CCP Board format, so the physical dimensions and bus connector positions match other CCP plug-in boards used in OSP controls. The module is dedicated to High Speed Communication, where dual DMA engines manage transmit and receive queues without CPU polling. On the front edge, a jumperless Switch Select array sets signal polarity, termination, and handshake mode for either RS232C or RS422 serial lines. These options let the board adapt to different cable lengths, noise conditions, and peripheral types in retrofit or new-build applications.

Installation is performed by sliding the card into a grounded backplane inside the Docking Rack; latches lock and bus fingers mate in one motion. Once active, the board provides the DNC-B/C drip-feed service that streams CNC blocks from scheduling servers in real time. Because the protocol supports lathe and machining center applications, the same part number can be used on both turning and milling machines. Tight timing on the proprietary system bus used by Okuma keeps handshake latency below the limits required for synchronized tool changes and offset updates.