GE Fanuc IC697CPX935 I/O Module 96 MHZ 32-BIT Floating Point 1 Mbyte Fast Memory

The IC697CPX935 is a single-slot Central Processing Unit (CPU) belonging to the Series 90-30 product line, developed by GE Fanuc as part of GE Intelligent Platforms’ PLC offerings. Designed for real-time system control, this module integrates robust performance, flexible communication capabilities, and ample memory to support large-scale industrial applications.

Core Hardware & Performance
At its heart, the IC697CPX935 features a 96 MHz 80486DX4 microprocessor, delivering a Boolean execution speed of 0.4 microseconds and enabling floating-point calculations at the same rapid 0.4-microsecond interval. Its memory configuration includes 1 MB of battery-backed Random Access Memory (RAM) (relying on the IC697ACC701 battery for backup) and 256 KB of non-volatile flash memory—the latter dedicated to storing system firmware. A key advantage of the flash memory is that firmware updates can be completed without disassembling the module or replacing EPROMs, simplifying maintenance.

For I/O handling, the CPU supports substantial capacity: it accommodates up to 12,000 discrete input/output (I/O) points (12K bits) and allocates 8,000 words of memory for analog I/O. This robust I/O capability makes it well-suited for large, complex industrial applications where extensive process monitoring and control are required.

Communication Capabilities
The IC697CPX935 is equipped with three built-in serial ports to facilitate versatile connectivity:

1x RS232 serial port
2x 9-pin D-shell RS485 interfaces

All three ports support SNP Slave communication protocol, while Break-Free SNP Slave functionality is exclusive to Port 1 and Port 2. Beyond serial communication, the CPU interacts with intelligent option modules, analog/discrete I/O modules, and other compatible devices via a rack-mounted backplane that adheres to the VME C.1 standard format.

Compatibility & Supported Modules
The IC697CPX935 offers broad compatibility with GE Fanuc’s industrial ecosystem, supporting:

GE IC697 family modules (including analog, discrete I/O, and smart option modules)
Alphanumeric and programmable display processors
Communication modules, GE IC660/IC661 bus controllers, and link/LAN interface modules

Operational Requirements & Control
Environmental & Cooling Needs
The IC697CPX935 must operate in environments where temperatures do not exceed 50°C. To maintain this temperature limit, forced air cooling is mandatory—compatible rack fan assemblies include:

IC697ACC721 (120 VAC)
IC697ACC724 (240 VAC)
IC697ACC744 (24 VDC)

Programming & Control

Programming Software: User programs are developed using MS-DOS or Windows-based software, then downloaded to the CPU. Configuration can also be done via a connected computer running MS-DOS, Windows 95, or Windows NT.
Operational Control: The CPU can be controlled in two ways: through software linked to a computer, or via a 3-position RUN/STOP switch on the module.