E4809-045-122-B Okuma
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MPN: 1911-1547-03-25
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The Okuma E4809-045-122-B is an electrical control processor board from the E4809 CNC Boards series, with a 16-bit processor running at a clock frequency of 15 MHz. It features 128 Kbyte D-RAM main memory, 48 Kbyte S-RAM backup memory, and uses a 3.6 V lithium battery. The board includes two F-Type encoder channels and is compatible with the OSP 5020M control.
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Product Description:
The E4809-045-122-B is an Okuma processor board belonging to the E4809 CNC Boards series. Serving as an interface between the machine axes and higher-level numerical control, the board manages instruction execution, memory access, and peripheral timing so that milling or turning centers can carry out programmed tool paths accurately within real-time industrial automation cycles. It integrates into OSP controller racks and coordinates data flow among servo drives, encoders, and operator panels. This role allows the control system to keep axis activity, stored program data, and operator commands synchronized during normal machine operation.
At its core, the board runs on a 15 MHz clock, setting the instruction rate for the 16-bit CPU and influencing how quickly interpolation routines can respond. Application data resides in 128 Kbyte D-RAM, giving volatile space for active part programs, temporary values, and axis-related variables during machining cycles. Persistent parameters are retained inside 48 Kbyte S-RAM, which remains powered when the machine is off so stored control information is not lost between operating periods. A 16-bit word length means each memory transfer or arithmetic operation moves two bytes, matching the data width commonly used by earlier OSP bus structures. A maintenance-replaceable battery supplies 3.6 V, helping the standby circuit keep the backup memory within its retention range during power loss.
The board is classified as an electrical control processor, meaning it accepts low-level I/O signals and issues motion-related commands to the drive stack. Its retention battery uses Lithium chemistry, which supports long storage life and stable backup service in this kind of control hardware. For position feedback, it supports 2 independent encoder channels configured for F-Type signal formatting, allowing axis feedback data to be handled through a consistent input structure. Software integration is supported through compatibility with OSP 5020M, so the card operates within that control environment and exchanges data in the format expected by the machine.
Frequently Asked Questions about E4809-045-122-B:
Q: What type and size of backup memory does the E4809-045-122-B feature?
A: The E4809-045-122-B board uses 48 Kbyte S-RAM for backup memory to store temporary data.
Q: What is the battery voltage and chemistry used with the E4809-045-122-B board?
A: This board requires a 3.6 V lithium battery for power backup applications.
Q: What is the processor clock speed of the E4809-045-122-B board?
A: The processor on the E4809-045-122-B operates at a clock frequency of 15 MHz.
Q: Which CNC control system is the E4809-045-122-B compatible with?
A: The E4809-045-122-B is designed for use with OSP 5020M control systems.
Q: How many encoder channels and what type does the E4809-045-122-B support?
A: This board provides 2 F-Type encoder channels for motion feedback.
