GE IC697CPU731 Series 90-70 Central Processing Units

GE IC697CPU731 Central Processing Unit

The GE IC697CPU731, also cataloged as the IC697CPU731 Central Processing Unit, operates as a dedicated hardware component for high-speed logic execution and I/O management within Series 90-70 PLC platforms.

Hardware Specifications

Industrial Control and Backplane Communication

The IC697CPU731 orchestrates data traffic across the Series 90-70 backplane, maintaining precise backplane bus communication velocity for synchronized I/O scanning. Users manage I/O density scaling by configuring memory allocation between data and program segments to suit specific application requirements. The processor architecture supports seamless integration with various smart option modules and LAN interfaces. Furthermore, the CPU maintains firmware flash compatibility with legacy expansion cards, ensuring operational stability across modular rack configurations.

Frequently Asked Questions (FAQ)

Q: Can the CPU be installed or removed while the rack power is active?

A: No, you must power off the PLC baseplate before installing or removing the CPU to prevent potential damage to the backplane connectors or internal circuitry.

Q: How is the volatile memory preserved during power loss?

A: You must connect a battery to the dedicated battery connectors on the CPU module. This battery supports data retention for the user program and configuration memory during power outages.

Q: What methods exist for controlling the operating state of the CPU?

A: You can control the CPU state manually via the three-position physical switch on the module faceplate, or remotely through a connected programmer using compatible software.

Field Installation Guidelines

1. Slot Positioning: Align the module with the guide rails in the intended PLC baseplate slot. Ensure the module seats fully into the backplane connectors before engaging the retaining mechanisms.
2. Battery Initialization: Connect the backup battery immediately after physical installation to ensure that data retention is active prior to system commissioning.
3. Grounding Protocols: Verify that the PLC rack chassis maintains a solid, low-impedance connection to the main cabinet ground bus to mitigate electrical noise and protect the 80C186 processor logic.
4. Wiring Discipline: Separate communication cables (LAN/RS-232) from high-voltage AC power wiring. Use shielded twisted-pair cabling for all external I/O signals to maintain signal integrity during high-speed processing cycles.