GE IC697CPM790-GD Central Processing Unit

Overview

The IC697CPM790-GD is a high-performance CPU module designed for mission-critical applications. It excels in Emergency Shutdown (ESD), fire and gas systems, and safety-related control environments. This CPU supports Triple Modular Redundancy (TMR) to ensure high reliability. It operates with a 64 MHz 80486DX2 processor and includes floating-point math capabilities for fast and accurate control logic execution. The module integrates seamlessly with GE’s Mark V Speedtronic control systems.

Technical Specifications

Processor & Memory

• CPU Type: 80486DX2

• Clock Speed: 64 MHz

• Memory: 1 MB battery-backed RAM

• Ladder Logic Program Memory: Up to 512 KB

• Floating Point Support: Yes

• Scan Rate: 0.4 microseconds per Boolean function

I/O Capabilities

• Discrete I/O (Simplex Mode): Up to 12K points

• Discrete I/O (TMR Mode): 2048 voted inputs and 2048 voted outputs

• Analog I/O (Simplex Mode): Up to 8K inputs and 8K outputs

• Analog I/O (TMR Mode): 1024 voted analog inputs

Communication & Interfaces

• Serial Port: RS-485 compatible (15-pin sub-D connector)

• Programming Interface: MS-DOS or Windows-based software

• Network: Ethernet TCP/IP or SNP port (via converter)

• Backplane Interface: VME C.1 standard format

Functional Features

• Triple Modular Redundancy (TMR): Supported via standalone C program

• Memory Protection: Password-controlled access and keyswitch

• Status Indicators: OK, RUN, Outputs Enabled, Memory Protect LEDs

• Firmware: In-system upgradeable

Mechanical & Environmental

• Slot Width: Single-slot module

• Mounting: Slot 1 of IC697 rack

• Operating Temperature: 0°C to +60°C

• Storage Temperature: –25°C to +70°C

• Weight: 1.2 kg