GE IC697CGR935-GB CPU Module

The GE Fanuc IC697CGR935-GB, also cataloged as the IC697CGR935 Single Slot CPU Module, operates as a dedicated hardware component for floating-point computations and primary system logic execution within Series 90-70 redundancy platforms.

Hardware Specifications

Backplane Bus Communication Velocity & Firmware Compatibility

• Backplane Bus Communication Velocity: Interfacing directly with the high-speed Series 90-70 VME-based backplane, the module achieves microsecond deterministic memory exchanges and floating-point logic execution synchronized across redundant PLC racks.
• Redundancy Synchronization Protocols: Supports both GHS (single bus network execution) and GDB (multiple I/O network procedure) architectures, enabling fail-safe hot-standby state execution with minimal latency during primary CPU switchover.
• Firmware Flash Compatibility: Onboard memory daughterboard configuration and system flash firmware baselines must remain identical between primary and secondary redundant CPU units to prevent synchronization faults during power-up boot diagnostics.

Frequently Asked Questions

Q: What is the mandatory installation position for the IC697CGR935-GB module?

A: The IC697CGR935-GB controller module must be installed in Slot 1 of Rack 0 within the Series 90-70 rack chassis to establish primary system backplane bus arbitration.

Q: How is program RAM retained during total system power shutdown?

A: Program and register data are preserved by an lithium battery backup module connected to one of the CPU module's dedicated front battery connectors prior to rack insertion.

Q: What do the front panel status LEDs indicate during a successful diagnostic boot sequence?

A: Upon initial power-up, the top LED blinks during self-diagnostics. Once completed, the top-left LED remains continuously lit while the second and third LEDs turn off, signaling a healthy operational hardware state.

Field Installation Guidelines

1. Verify that all AC/DC power sources to the Series 90-70 rack are completely turned off before installing or removing the CPU module.
2. Confirm that the CPU key switch is set to the MEMORY PROTECT OFF position.
3. Attach an external lithium battery assembly to one of the two dedicated battery connectors on the module faceplate to prevent memory loss upon system de-energization.
4. Align the IC697CGR935-GB circuit board edges with the guide rails in Slot 1 of Rack 0.
5. Slide the module into the slot until the rear backplane connectors are fully engaged, and tighten the top and bottom captive mounting screws to secure the module to the rack frame.
6. Connect all required field communications or synchronization bus cables to the front port interfaces.
7. Apply rack power and observe the front diagnostic LED sequence. Confirm that the top-left diagnostic LED remains illuminated following self-test completion before switching the unit to RUN mode.