Description of IC697MEM735 MEMORY EXPANDER SERIES 90-70 AVAILABLE IN 128/256 KBYTES

Quick Details:

IC697MEM735

• MEMORY EXPANDER
• SERIES 90-70
• AVAILABLE IN 128/256 KBYTES
• W/256 KBYTES NON-VOLATILE FLASH MEMORY
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Product Description

IC697MEM735 is a 32-bit CMOS Expansion Memory manufactured , IC697MEM735 is available in 128 KB, 256 KB w/256 KB non-volatile flash memory, 256 KB, and 512 KB. It is useful for the expansion of data and logic memory for CPU modules 780/781/782/788/789. Expansion Memory IC697MEM735 is installed as a daughter board and shares the same slot as the module it serves.

Baseboard uses expansion memory for CPU operation since RAM is not available. The battery available on the CPU board helps retain memory in case of power loss. IC697MEM735 retains flash memory when there is power loss even if battery connection is not present. PLC CPU uses checksum method for continuous error checking of program memory to report errors of memory parity. Error checking and parity generation takes place for every byte for SRAM memory.

For installation of IC697MEM735, the user must align connectors of CPU and the board with proper fitting of the screws and the standoffs on board. Before installation of the CPU can begin, the power to the rack must be OFF. After CPU placement in the rack, the user can turn the power ON. The user can clear the memory using programming software such as Windows system or MS-DOS.

In the absence of power to the memory, the lithium battery IC697ACC701 supplies power to keep the memory intact. IC697ACC701 also handles the operation of the calendar clock available on the CPU. The user must install the new battery before removal of the old one.