GE Fanuc Memory Expansion Modules Series 90-70 IC697MEM715

The GE Fanuc IC697MEM715 serves as the primary IC697MEM715 Memory Expansion Module utilized to execute volatile data storage expansion across Series 90-70 PLC platforms. The module interfaces directly with the host central processing unit via the standard backplane architecture to extend the available memory register allocation for user logic programs, register tables, and system diagnostics data. It operates via dedicated hardware addressing space mapped directly through the CPU module parameters.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Compatibility

This daughterboard module relies on direct trace coupling to the CPU board, ensuring negligible latency relative to the standard backplane bus communication velocity limits. It matches the parallel clock cycles of the host processor to enable immediate execution of complex logic programs without introducing wait-states into the system scan time. System implementation requires explicit firmware flash compatibility verification; the host CPU operating system must be at or above the minimum revision threshold to recognize and map the expanded 256 kBytes capacity during the power-up initialization cycle.

Frequently Asked Questions

Q: Does the IC697MEM715 module support hot-swap insertion or removal while the rack is powered?

A: No. The IC697MEM715 is a physical daughterboard extension that plugs directly into dedicated pins on the host CPU module. Inserting or removing this component while the chassis power supply is energized will cause electrical damage to both the memory card and the host CPU processor board.

Q: How is data preserved on the CMOS SRAM array when primary rack power is disconnected?

A: The module does not contain an onboard battery. Data retention during power interruption is maintained entirely through the lithium battery pack connected to the host Series 90-70 CPU module, which distributes a standby voltage across the module interface pins.

Field Installation Guidelines

• Electrostatic Discharge Protection: Personnel must wear a properly grounded ESD wrist strap when handling the daughterboard module to prevent static discharge to the CMOS memory cells.
• Mechanical Alignment: Power down the PLC rack, extract the host CPU module, and align the plastic guide pins and electrical connectors of the IC697MEM715 precisely before applying perpendicular pressure to seat the board.
• Firmware Verification: Verify that the host CPU firmware version supports the exact memory allocation block size through the programming software before attempting to download new logic configurations.
• Retention Screw Torque: Tighten any physical module retention hardware according to standard mechanical chassis tolerances to prevent connection dropouts caused by industrial vibration profiles.