The General Electric IC697CPX935 is a high-performance, single-slot Central Processing Unit (CPU) module designed for the Series 90-70 Programmable Logic Controller (PLC) platform. Engineered for real-time control of complex industrial processes, this module utilizes a 96 MHz 80486DX4 microprocessor to deliver efficient execution of logic and data processing tasks.

Features

• Single-slot design with three integrated serial ports (1x RS-232, 2x RS-485).
• 1 MB of battery-backed RAM and 256 KB of non-volatile user flash memory.
• Fast Boolean execution speed of 0.4 microseconds per function.
• Supports floating-point calculations for advanced process control.
• Configurable memory allocation for data and programs.
• Three-position operation mode switch (RUN/STOP) for local control.
• Seven front-mounted green LEDs for real-time status indication.

Technical Specifications

Applications

The IC697CPX935 is widely utilized in large-scale industrial automation environments, including:

• Combined-cycle power plants for turbine synchronization.
• Nuclear and hydroelectric generation control systems.
• Large-scale wind turbine automation.
• Oil and gas refinery monitoring for compressors and pumps.
• Water treatment facility process coordination.

Installation Guidelines

• Ensure the CPU is installed in the designated slot (typically Slot 1, Rack 0) of the IC697 backplane.
• Always power down the rack before inserting or removing the module to prevent electrical damage.
• Ensure the module is fully seated and the locking mechanism is engaged to maintain proper backplane contact.
• Use shielded cables for serial communication to minimize EMI interference.
• Maintain proper ventilation within the cabinet to ensure the module operates within its 50 degC thermal limit.
• Verify battery (IC697ACC701) installation to ensure data retention during power loss.

FAQs

What is the primary function of the IC697CPX935?

The IC697CPX935 serves as the central controller for the Series 90-70 PLC system, handling logic execution, I/O communication, and process control tasks.

How is the module programmed?

Programming and configuration are performed using compatible MS-DOS or Windows-based software via the serial communication ports.

What happens if the battery fails?

The battery is required to maintain the contents of the RAM. If the battery voltage drops below the threshold, the memory contents may be lost during a power cycle; it is recommended to replace the battery periodically.

Can I restrict access to the program?

Yes, program and configuration data can be secured using software passwords or by using the physical memory protect keyswitch on the module front panel.