I. Basic Information
Full Model：IC695CPU320-CF
Brand & Origin：GE Fanuc / GE General Electric, USA
Product Positioning
As a high-end core CPU main control module of GE PACSystem RX3i series programmable automation controllers, it serves as the central core component for logic operation, program scheduling, I/O management, communication networking and closed-loop control of the entire PLC automatic control system. Designed for medium and large-scale industrial automatic control systems, it is mainly responsible for production line process logic operation, equipment linkage control, analog closed-loop regulation, full-station I/O data acquisition and processing, data interaction with upper systems and overall equipment fault management. It undertakes core main control tasks including system program cyclic execution, real-time task scheduling, equipment interlock protection, data storage and recording, and system redundant coordination. It is an essential original core spare part for upgrading and expanding PLC systems, replacing outdated CPU modules, improving operational performance of automatic control systems and optimizing equipment control accuracy.
Hardware Architecture
It adopts an industrial-grade 1.0GHz Celeron M high-performance embedded operation architecture with a 32-bit RISC high-speed instruction operation system. Equipped with 64MB high-speed RAM, 64MB non-volatile NVRAM power-down storage unit, dual independent serial communication ports, backplane high-speed bus interaction loop, hardware real-time clock, system self-check diagnosis circuit and fault latching module. The entire PCB is coated with military-grade triple-proof conformal coating, featuring partitioned layout of main control operation, storage and communication units, independent wiring for strong and weak currents and shielding noise reduction design for high-frequency operation loops. It delivers fast operation speed, stable program scheduling, safe data storage, efficient communication response and zero crash or drift during long-term uninterrupted operation. Specially designed for harsh industrial conditions featuring high-frequency logic operation, multi-equipment linkage, continuous high-load scheduling and complex electromagnetic interference, it effectively avoids production line shutdown, equipment misoperation and process runaway caused by delayed main control operation, program abnormality, data loss and communication lag.
Mounting Specification
It supports embedded installation on standard 12-slot/16-slot backplane racks of GE PACSystem RX3i series, with precise alignment and locking via standard backplane bus, providing reliable electrical contact, excellent shock resistance and anti-loosening performance. Featuring high integration and compact structure, it fully adapts to the standard layout of RX3i series control cabinets and the dust-proof, moisture-proof, vibration-resistant and wide-temperature round-the-clock continuous operation environment of sealed industrial control cabinets. It is easy to assemble and disassemble with regular wiring, facilitating on-site program downloading, parameter configuration and fault troubleshooting, fully complying with RX3i system rack installation and electrical docking specifications.
Compatible Systems
Fully compatible with GE PACSystem RX3i full-series PLC automatic control systems, it can seamlessly network and coordinate with system power modules, digital/analog I/O modules, communication expansion modules, high-speed counting modules and motion control modules. Perfectly adapted to Proficy Machine Edition dedicated programming and configuration software, it supports full-process operations including program editing, online monitoring, parameter setting, program upload/download and system diagnosis. As the core main control unit of the system, it coordinates the overall equipment logic operation, I/O management, communication interaction and closed-loop control, supporting stable automatic operation of industrial production lines under all working conditions.
Product Characteristics
A standardized original industrial-grade high-end CPU main control module. It completes high-speed operation calibration, program stability testing, full-load burn-in testing, data storage reliability verification and full EMC electromagnetic compatibility certification before factory delivery. It supports multi-task parallel scheduling, large-capacity program storage, millisecond-level high-speed logic operation and permanent power-down data preservation. Compatible with mainstream industrial protocols such as Modbus RTU and SNP/SNPX, it features strong communication adaptability. Integrated with comprehensive hardware self-check, fault diagnosis, status latching and abnormal alarm functions, it complies with Class A industrial automatic control equipment operation standards and supports 24/7 uninterrupted high-load continuous operation. Outdated faulty CPU modules of RX3i series can be replaced in situ without damage.
II. Technical Specifications
1. Core Operation & Memory Parameters
Processor Architecture: Equipped with 1.0GHz industrial-grade Celeron M processor and 32-bit RISC high-speed instruction operation system, it executes Boolean instructions at 0.1μs per instruction and data operation instructions at 1μs per instruction. It supports parallel processing of I/O acquisition, logic operation, data processing and communication interaction without operation stuttering or task delay. The controllable control cycle is ≤10ms under normal working conditions, meeting high-speed real-time control requirements of medium and large-scale automatic production lines. Memory Configuration: Standard 64MB high-speed RAM and 64MB NVRAM non-volatile power-down storage ensure permanent preservation of programs, process parameters, fault records and operating data after power failure without data loss risk. It supports up to 512 program blocks with a maximum single block capacity of 128KB, capable of carrying complex process logic and multi-equipment linkage control programs.
2. Communication & Interface Parameters
Equipped with two independent serial communication interfaces including RS232 local configuration debugging port and RS485 remote networking port with clear division of labor and no mutual interference. The RS232 port is dedicated to local program upload/download, online monitoring, firmware upgrading and on-site parameter debugging; the RS485 port is used for remote networking, multi-equipment communication linkage and data interaction with upper SCADA systems. Compatible with Modbus RTU, SNP/SNPX mainstream industrial protocols, it delivers accurate data transmission timing with no packet loss or frame error and excellent communication stability. It supports high-speed backplane bus communication for high-speed data synchronization with all I/O and expansion modules in the rack, ensuring synchronous instructions, status and data of the entire system.
3. Electrical & Operating Parameters
Adapted to standard backplane power supply of RX3i systems, it features low power consumption and controllable heat generation, with no overheating frequency reduction or performance attenuation during long-term high-load operation. Built-in power supply monitoring and abnormal voltage self-check circuits monitor power status in real time to avoid main control restart and program abnormalities caused by power supply fluctuations. It supports adaptive scheduling of multi-working-condition tasks, automatically optimizing operational resource allocation according to equipment load, operating at low energy consumption under light load and full performance under high load, adapting to full-condition operation requirements of industrial equipment including start-stop, variable load and continuous production.
4. Diagnosis & Protection Parameters
Built-in full-dimensional system hardware diagnosis functions support processor operation self-check, storage unit detection, communication link diagnosis, backplane bus status monitoring and power abnormality identification, enabling accurate positioning of hardware faults, program errors, communication interruptions and bus abnormalities with fault code latching. Adopting electrical isolation architecture for operation and communication areas, the onboard multi-stage circuits for surge absorption, electrostatic protection and pulse interference suppression provide industrial-grade EMC electromagnetic compatibility protection. It resists intense industrial cabinet electromagnetic interference, instantaneous line impact and grid fluctuation interference, with independent single-module fault tolerance and no fault propagation to the entire automatic control system.
5. Environmental Operating Parameters
Operating Temperature：0℃～+60℃
Storage Temperature：-40℃～+85℃
Operating Humidity：5%~95% RH, non-condensing
It withstands harsh industrial conditions including alternating temperature and humidity, dust accumulation, mechanical vibration, electromagnetic radiation interference and long-term high-load operation fluctuations, suitable for year-round uninterrupted high-reliability continuous operation of automatic equipment in intelligent manufacturing, energy heavy industry, chemical industry, water treatment and other fields. The net weight is about 0.703kg with stable structure and excellent shock and weather resistance.
III. Key Features
1. High-Speed Core Operation for Precise Control of Complex Processes
Supported by 1.0GHz high-frequency processor and 32-bit high-speed operation architecture, paired with millisecond-level control cycle and ultra-fast instruction execution speed, it efficiently processes high-intensity operation tasks such as multi-equipment linkage, multi-loop closed-loop regulation and complex interlock logic. The multi-task parallel scheduling mechanism synchronously completes I/O acquisition, logic operation, data storage and communication interaction, eliminating operation delay, process deviation and unsynchronized equipment linkage. It precisely meets the high-precision and high real-time process control requirements of medium and large-scale automatic production lines, ensuring stable production processes and consistent product parameters.
2. Large-Capacity Power-Down Storage Ensures Data Security
The dual storage architecture of 64MB RAM + 64MB NVRAM provides sufficient operating memory for stable operation of large-capacity complex programs. The non-volatile power-down storage unit permanently saves user programs, process setting parameters, equipment operation logs and fault record data. No program re-downloading or parameter resetting is required after power failure, shutdown or accidental restart, and normal operation resumes immediately after power-on. It completely avoids production faults caused by power-off data loss and parameter disorder, greatly improving system operation stability and production continuity.
3. Dual Independent Communication Ports for Convenient Networking & O&M
Equipped with dual independent RS232+RS485 serial ports with clear functional division and complementary performance. The local RS232 port supports rapid on-site program debugging, firmware upgrading and online monitoring for short-distance operation and maintenance; the remote RS485 port supports long-distance industrial networking and seamless docking with upper SCADA, configuration software, intelligent instruments, frequency converters and other peripheral equipment. Compatible with multiple mainstream industrial protocols, it features flexible networking and strong scalability, enabling rapid construction of automatic monitoring and management systems and adapting to single equipment and full-line automatic networking scenarios.
4. Full-Dimensional Fault Diagnosis Improves O&M Efficiency
Integrated full-dimensional system self-check and fault diagnosis functions monitor CPU operation status, storage status, communication links, backplane bus and power supply conditions in real time. It automatically identifies various hardware faults, program abnormalities and communication faults, latches fault codes and records fault time sequences. Operation and maintenance personnel can quickly and accurately locate fault points without section-by-section inspection, significantly reducing fault downtime and maintenance time. It adapts to unattended and continuous high-reliability production operation needs of industrial sites and effectively improves equipment operating rate.
5. Commissioning-Free In-Situ Replacement Reduces Renovation Costs
The hardware dimensions, backplane interfaces, program logic and communication protocols fully comply with GE RX3i system standards. For problems of outdated CPU modules such as operation stuttering, program crash, data loss, abnormal communication and frequent faults, direct in-situ plug-and-play replacement is available. No system program modification, parameter reconfiguration or complex debugging and calibration is required. It can be put into full-load operation after power-on self-test and simple parameter verification, drastically shortening the downtime for automatic system technical renovation and maintenance and reducing operation and maintenance costs.
IV. Working Principle
GE IC695CPU320-CF serves as the core main control module of GE PACSystem RX3i automatic control systems. After being installed on the system standard backplane rack and powered on, the module automatically completes hardware self-test, processor initialization, storage unit verification, communication link matching and system fault clearing, finishes program loading and parameter initialization, and enters the normal multi-task main control operating state.
Relying on the high-speed 32-bit operation core, the module cyclically executes user preset process programs and control logic, collects switching and analog operating data of all I/O modules in the rack in real time through the high-speed backplane bus, and synchronously receives control commands from upper systems and peripheral equipment. The processor performs high-speed logic operation, threshold judgment and closed-loop regulation calculation on collected data and control commands, generates accurate equipment control commands, and issues them to each I/O and drive module through the backplane bus to realize automatic actions such as equipment start-stop, process regulation, interlock protection and linkage control.
During operation, the module stores equipment operating parameters, process data and operation logs in the NVRAM power-down storage unit in real time, and uploads data to the upper monitoring system through the RS485 serial port; the local RS232 port responds to operation and maintenance debugging, program modification and firmware upgrading commands in real time. The module monitors its own hardware, communication, power supply and bus operating status throughout operation. Once abnormal faults are detected, it immediately latches fault information, triggers system alarms and executes fault protection logic to avoid equipment misoperation and process runaway. It can quickly reset and resume operation after fault elimination, continuously ensuring closed-loop, stable, accurate and safe operation of the entire RX3i automatic control system.
V. Application Scenarios
1. GE RX3i PLC Core Automatic Control Systems: Exclusively applied as the main control center of GE PACSystem RX3i medium and large-scale automatic control systems, undertaking overall logic operation, I/O management, process closed-loop control and communication networking tasks for various industrial complete sets of automatic equipment.
2. Intelligent Production Line Control Systems: Used for automatic line control, equipment linkage control and closed-loop process parameter regulation in mechanical processing, assembly, packaging, conveying and other continuous production lines, ensuring high-speed, accurate and stable automatic operation of production lines.
3. Energy & Heavy Industry Public Engineering Systems: Adapted to harsh working conditions of thermal power plants, water treatment, oil and chemical industry, metallurgy and heavy industry, it undertakes interlock control, condition monitoring, safety protection and data uploading tasks for public equipment, ensuring year-round uninterrupted high-reliability operation of heavy industrial equipment.
4. Technical Renovation & Spare Replacement of Legacy Industrial Control Systems: Serving as an original core spare part for in-situ replacement of faulty modules, upgrading system operational performance, optimizing automatic system stability and intelligent upgrading of production lines, solving problems of insufficient operational performance, failed data storage, unstable communication and high failure rate of legacy RX3i series CPU modules.
