2048 KB Expansion Memory IC697MEM715 GE Fanuc Module

Product Overview

The GE Fanuc IC697MEM715 is a high-capacity expansion memory module designed for the Series 90-70 PLC system. Providing 2048 KB (2 MB) of additional storage, this module significantly increases the available space for complex logic programs, extensive register data, and historical logging. 

Technical Configuration

The IC697MEM715 serves as a plug-in daughterboard that integrates directly with the Series 90-70 CPU architecture:

• Memory Type: High-speed Static RAM (SRAM) for volatile data storage.
• Storage Capacity: 2048 KB (2 Megabytes) of total memory space.
• Access Speed: 100 ns access time for optimized scan cycle performance.
• Mounting: Direct plug-in module designed for CPU-mounted expansion.
• Data Protection: Nominal 6-month retention without applied power when backed by a system battery.

Technical Specifications

Installation & Maintenance

Install the IC697MEM715 only when the rack power is disconnected to prevent electrical damage to the Static RAM cells. Align the module with the expansion pins on the Series 90-70 CPU and apply even pressure until fully seated. Because SRAM is volatile, your program relies on the PLC’s lithium battery for retention during downtime. With a 10-year battery shelf life and a 6-month nominal retention duration, regular battery maintenance is critical to prevent data loss.

Engineering Advantages

With its 2048 KB capacity, the IC697MEM715 eliminates memory bottlenecks in large-scale applications such as coordinated motion control or complex PID loops. Its high-speed 100 ns access time ensures that the CPU can execute logic rungs without waiting for memory latency. This daughterboard allows engineers to expand system capabilities without replacing the core CPU, providing a cost-effective path for system scaling and increased data handling.

Technical FAQs

Q1: Can I use the IC697MEM715 to store programs permanently?
A1: No. Static RAM is volatile. For permanent storage that survives battery failure, programs should be burned to an EPROM or Flash module after development.

Q2: Is this module compatible with all Series 90-70 CPUs?
A2: It is compatible with most 90-70 CPUs that support expansion daughterboards, though you should verify your CPU’s specific firmware version and maximum memory addressing limits.

Q3: How do I handle the module safely during installation?
A3: Use a grounded ESD wrist strap. Static RAM is highly sensitive to electrostatic discharge, which can cause latent failures if the module is handled with bare hands.