E4809-045-201 Okuma
Wake Industrial LLC is not an authorized distributor of this product.
MPN: 1911-2205-46-299
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The Okuma E4809-045-201 is a Memory Board-B from the E4809 CNC Boards series. It features three ER17500V thionyl chloride lithium batteries with a voltage of 3.6 V, and uses a brown 2-pin connector. The board includes flash memory with a density of 4 Mbit and mask ROM of 1 Mbit.
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Product Description:
Okuma’s E4809-045-201 belongs to the E4809 CNC Boards series and is supplied as a Memory Board-B for OSP numerical controllers. Installed in the control rack, the board retains system parameters, part programs, and machine status data so that the CNC can resume its last known state after power cycles or maintenance. This function supports stable startup behavior and preserves stored operating information when main power is removed.
The card mounts to the backplane with 2 edge connectors that route power and bus signals directly to the CPU section. It carries a surface-mounted flash array composed of an AM29F040 device, giving nonvolatile storage of 4 Mbit (512K × 8) for firmware updates and ladder revisions. Long-term fixed code is handled by a mask ROM group anchored by the TC531001BCL-85L component, which provides an additional 1 Mbit (128K × 8) so that boot routines and self-diagnostics remain unchanged through normal machine use. Twenty footprints are laid out for these flash or ROM packages, providing space for memory-device population without redesigning the PCB. The board is designated as Memory Board-B and matches the slot assignment in the controller cabinet wiring diagram.
Parameter retention during shutdown is supported by three cylindrical cells, and each position accepts an ER17500V battery with Thionyl Chloride Lithium chemistry for high energy density and extended shelf life. The pack voltage is held at 3.6 V, which is sufficient for static RAM retention while remaining low enough to avoid regulator stress. A set of 3 cells is wired in parallel through a brown 2-pin connector, allowing the battery pack to connect without soldering. Separate plated through-holes provide a place to record installation dates, and unused flash footprints offer expansion space if additional user macro storage is needed.
Frequently Asked Questions about E4809-045-201:
Q: How many and what type of batteries does the E4809-045-201 board require?
A: The E4809-045-201 board uses three ER17500V Thionyl Chloride Lithium batteries.
Q: What is the flash memory density on the E4809-045-201 board?
A: This model features a 4 Mbit (512K x 8) flash memory density.
Q: What type of connector does the E4809-045-201 use for its battery?
A: A brown 2-pin connector is used for the battery connection on this board.
Q: How many backplane connectors are available on the E4809-045-201 board?
A: The E4809-045-201 is equipped with two backplane connectors.
Q: What mask ROM device and density are featured on the E4809-045-201 board?
A: The mask ROM device used is TC531001BCL-85L and has a density of 1 Mbit (128K x 8).
