GE IC697PCM711P Programmable Coprocessor Module

Technical Specifications

Processor & Memory

• Microprocessor: 12 MHz 80c186, offering performance comparable to 90% of an IBM AT

• Base Memory: 96 KB battery-backed CMOS for logic and data storage

• User Memory: Maximum 95 KB standard, expandable via memory daughterboards

• Expansion Options: Supports 64 KB, 128 KB, 256 KB, or 512 KB expansion memory boards

• Clock: Real-time calendar clock synchronized with the PLC

Power Requirements

• Backplane Load: Requires 1 Amp from the +5 VDC bus

• Input Voltage (Module): Supports 120/240 VAC or 24 VDC configurations (depending on specific hardware revision)

• Battery Backup: Lithium battery supports data retention for 6 months (no external power)

Physical Characteristics

• Dimensions: 4.1 cm x 16.0 cm x 9.9 cm (1.6″ x 6.3″ x 3.9″)

• Weight: Approximately 0.44 kg to 0.5 kg (0.97 to 1.1 lbs)

Environmental Limits

• Operating Temperature: -20°C to +70°C (some sources indicate 0°C to 60°C base range)

• Storage Temperature: -40°C to +85°C

• Protection Rating: IP65 (front panel)

Functional Features

High-Speed Processing & Counting
The module handles high-speed event processing with counting frequencies up to 620 kHz. It supports high-speed counting, frequency measurement, and pulse output capabilities, making it suitable for precision timing control and dynamic monitoring .

Flexible Programming Capabilities
It supports multi-tasking operations including real-time calculations, operator interface management, and data functions. The module is programmable using Ladder Diagram (LDI), Instruction List (IL), Structured Text (ST), and C Blocks via PCM development software .

Robust Communication Interfaces
Equipped with two serial ports configurable for RS-232, RS-422, or RS-485 protocols, supporting baud rates up to 19.2 kbaud. The module communicates with the PLC CPU directly through the backplane, requiring no additional application support from the main processor .

Integrated Protocol Support
The module features built-in Ethernet user support for SRTP and Modbus TCP/IP application protocols, providing real-time links to connected systems. It also integrates various fieldbus interfaces including Profibus, DeviceNet, and ControlNet for distributed control and I/O management .

Redundancy & Reliability
The design supports modular redundancy configurations. It features a “soft configuration” method with no DIP switches or jumpers required; all settings are managed via MS-DOS or Windows-based programming software. Status LEDs provide immediate visual feedback on operational health .

Application Scenarios

Motion Control Systems
Used in CNC machines and robotic joints for precise position and speed control via high-speed pulse outputs. Typical applications include controlling mechanical arm motion timing in automotive welding lines with accuracy under 0.1mm .

Process Automation
Suitable for monitoring pulse signals from flow meters and pressure sensors in petrochemical and power industries. For example, collecting real-time reactor temperature and pressure pulse signals in refinery catalytic cracking units to adjust process parameters .

Discrete Manufacturing
Applied in packaging machinery, material handling, textiles, and printing. The module handles speed monitoring of packaging machines and dynamic positioning of production lines .

Critical Infrastructure
Suitable for power plant DCS monitoring systems, hydroelectric plants, and chemical factory fluid control systems where high reliability and continuous operation are required. Supports SIL3 safety levels through TMR (Triple Modular Redundancy) configurations .

System Compatibility

• Compatible CPUs: IC697CPU78x and IC698CPU78x series

• Chassis: Fits any standard GE 90-70 series rack

• Programming Tools: IC647 or IC640 computers, or IBM compatible PCs