E4809-436-091-C
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The E4809-436-091-C CNC board features static random access memory (SRAM), a parallel interface, and an operating voltage of typically 5V. Part of the E4809 CNC Boards series by Okuma, it is designed for high-reliability industrial applications and operates within a temperature range of -40°C to +85°C.
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Product Description:
Okuma E4809-436-091-C SRAM Card is a memory storage card that is used in their CNC systems. The item is made to work with machine control units that need to reach memory quickly and reliably. The SRAM card has a capacity of 2 MB and is very important for CNC processes that need to store and retrieve data reliably.
In the E4809-436-091-C SRAM Card, Hitachi HM628128 memory chips are used, which are 128K x 8-bit static RAM. Each chip has an access time of about 70 ns, which lets it handle memory tasks quickly. The chips are put in either SOP or DIP packages. There are 16 chips visible on the front of the PCB, and there are extra pads on the back that can fit up to 24 chips. This arrangement shows an adaptable design that works with different model variations and extra memory up to 3 MB. The card has a 98-pin edge connector with gold fingers that make sure it can link to the host system safely and quickly. The PCB sizes are the same as those used in SRAM cards, which are often built into CNC and industrial control systems. The memory stores settings that tell the machine how to work, NC programs that do the actual machining, and system data that helps it do its task during runtime.
The configuration of the E4809-436-091-C SRAM Card is stable and can be expanded in the future. There are several test places in the design that let maintenance teams check the integrity of the signals. The card is often put in Okuma CNC machines to keep important system data safe between power cycles.
Frequently Asked Questions about E4809-436-091-C:
Q: Does E4809-436-091-C support chip expansion?
A: Yes, the card has 24 chip positions. Only 16 are mounted, leaving space for future memory upgrades or model variations.
Q: Do E4809-436-091-C memory chips need fast access?
A: Yes, the 70 ns access time improves read/write speed. It helps in the rapid execution of NC programs and parameter retrieval.
Q: Why does E4809-436-091-C have 2 MB capacity?
A: 2 MB is sufficient for storing system data. It holds parameters, programs, and runtime information without needing external storage.
Q: How does E4809-436-091-C maintain signal integrity?
A: The PCB includes test points for diagnostics. These support maintenance teams in verifying stable voltage and clean signal paths.
Q: Do E4809-436-091-C chips have an 8-bit structure?
A: Yes, each chip is 128K x 8-bit. This supports byte-level data handling, essential for precise CNC data operations.
