GE IC693CPU340 PLC Central Processing Unit Module

GE IC693CPU340 PLC Central Processing Unit Module

GE IC693CPU340 PLC Central Processing Unit Module

Brand： GE Fanuc

Product ID： IC693CPU340

Condition： New / used

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Description

GE IC693CPU340

I. Basic Information


Model: IC693CPU340

Brand: GE Fanuc 

Product Line: Single-slot main control CPU module for Series 90-30 medium-sized modular PLC, designed for medium and small discrete & process automation projects, integrating logic control, analog closed-loop regulation and basic data communication functions, serving as mainstream mid-range controller of 90-30 series.


Product Positioning

IC693CPU340 adopts compact single-slot hardware design, equipped with 20MHz 80C188XL industrial processor, 32KB Flash program memory and large-capacity register memory. It supports up to 1024 discrete I/O points and 192 analog channels, expandable via one main backplane and four extension backplanes. Equipped with hardware watchdog and battery-backed RTC clock, it realizes complete power-on self-test and runtime fault diagnosis, which can execute sequential logic control, PID closed-loop adjustment, timed interrupt and data upload tasks. Widely applied in machinery, water treatment, HVAC, auxiliary power control and packaging industries, it balances control performance, storage capacity and deployment cost, applicable for legacy 90-30 system renovation and new small & medium automation projects.


Hardware Architecture

Integrated single-slot PCB plug-in structure composed of five core units:
  1. Main Processing Unit: 20MHz 16-bit 80C188XL industrial processor with hardware watchdog to recover system crash automatically, logic scan speed 0.3ms per 1K Boolean contacts, without floating-point arithmetic function.
  2. Storage Unit: 32KB non-volatile Flash for user program permanent storage; 10K-word %R register memory for process variables; built-in replaceable lithium battery to retain RTC clock and key offline data for more than one year.
  3. Onboard Communication Unit: Integrated RS232/RS485 serial port supporting SNP, SNP-X, Modbus RTU slave protocols for programming, HMI and SCADA connection; master communication function requires external CCM/PCM expansion modules.
  4. Backplane Bus Interface: Dedicated parallel bus for high-speed data exchange between CPU and local/expansion I/O modules with built-in data error verification mechanism.
  5. Diagnostic Indication Unit: Front-panel LED indicators for RUN, FAULT, BATTERY and COMM status to quickly locate hardware, power, battery and communication faults.
The module adopts flame-retardant industrial PCB with ESD & EFT surge protection on all ports and metal shielding housing to resist industrial electromagnetic interference.


Mounting Specification

Compatible with 5-slot / 10-slot standard main backplane of GE 90-30 series, vertical snap-in single-slot installation, maximum 4 extension backplanes cascaded. It has passed IEC anti-vibration, humidity cycle and wide-temperature aging tests, with standardized dimensions for direct spare replacement.Dimension (W×H×D): 90mm × 126mm × 50mm, net weight: 0.272kg.


Compatible Systems

  1. Hardware: 90-30 series main/extension backplanes, IC693 digital, analog and special-function I/O modules;
  2. Communication Accessories: CCM, PCM communication co-processor, isolated RS485 repeaters, programming cables;
  3. Configuration Software: Proficy Machine Edition, supporting LD, FBD, ST IEC61131-3 programming languages;
  4. Upper Equipment: Touch screen, SCADA system, third-party PLC and smart transmitters;
  5. Application Industries: Mechanical automation, municipal wastewater treatment, HVAC, auxiliary power control, packaging & textile production lines.


Product Characteristics

  1. Compact single-slot design saves rack space and reserves enough slots for I/O and communication expansion;
  2. 32KB Flash non-volatile memory permanently stores user programs without external storage card;
  3. Max 1024 discrete I/O and 192 analog points meet medium-sized project point expansion requirements;
  4. Supports periodic and event interrupt subroutines to realize high-speed data acquisition and precise sequential interlock control;
  5. Hardware overcurrent, surge and ESD protection plus watchdog automatic reset ensure continuous production operation under abnormal conditions;
  6. Native Modbus RTU slave protocol facilitates seamless connection with third-party monitoring equipment;
  7. UL & CE certified with wide temperature and humidity adaptability for long-term stable operation in standard industrial electrical rooms.


II. Technical Specifications


2.1 Electrical Parameters

  • Rated Backplane Power: +5VDC, typical operating current 490mA, max power consumption 3W;
  • Backup Battery: 3.6V lithium battery, minimum operating voltage 2.7V, low voltage triggers battery alarm LED;
  • Serial Communication: Max baud rate 19200bps, RS485 supports up to 32 slave nodes per bus;
  • Dielectric Withstand Voltage: 500VAC/1min isolation between communication ports and ground.


2.2 Calculation & Storage Parameters

  • CPU: 80C188XL, 20MHz 16-bit processor, no floating-point unit;
  • Logic Scan Speed: 0.3ms / 1000 Boolean contacts;
  • User Program Memory: 32KB Flash;
  • Register Memory: 10K words (%R), global memory %G: 1280 bits;
  • Max I/O Capacity: DI 512, DO 512, AI 128, AQ 64;
  • Backplane Expansion: 1 main + up to 4 extension backplanes.


2.3 Communication Protocols

  • Onboard Serial: SNP, SNP-X, Modbus RTU (Slave only);
  • Extended Communication: Modbus RTU Master, GENIUS Bus via CCM/PCM modules;
  • Local Commissioning: RS232 for program upload/download and online variable monitoring.


2.4 Environmental Specifications

  • Operating Temperature: 0℃ ~ +60℃ (unventilated cabinet);
  • Storage & Transport Temperature: -40℃ ~ +85℃;
  • Relative Humidity: 5%～95%RH, non-condensing, no corrosive gas or heavy dust;
  • Vibration Standard: IEC 60068-2-6, continuous 0.7g vibration in horizontal & vertical directions;
  • Protection Class: Bare unit IP20, IP30 when installed in sealed metal cabinet;
  • EMC Compliance: IEC 61000-6-2 industrial immunity standard.


2.5 Mechanical Parameters

  • Dimension (W×H×D): 90mm × 126mm × 50mm;
  • Net Weight: 0.272kg;
  • Mounting: Vertical snap-in single-slot installation on 90-30 standard backplane;
  • Housing: Flame-retardant ABS shell, FR4 V0 flame-retardant PCB.



III. Key Features


3.1 Sequential Logic & Closed-Loop Process Control

Supports mainstream IEC61131-3 programming languages to realize equipment interlock, emergency stop, sequential control and fault alarm; built-in standard PID function blocks for temperature, pressure, liquid level and flow closed-loop regulation, combined with interrupt technology to improve control response accuracy for environmental protection, HVAC and chemical small-scale process projects.


3.2 Distributed I/O Expansion & Data Acquisition

Multi-stage cascaded extension backplanes collect field discrete and analog signals, complete range conversion, digital filtering and limit judgment, and output control instructions to actuators; global registers realize cross-module data sharing for complex interlock logic programming.


3.3 Multi-Mode Industrial Data Communication

The onboard RS232/485 port supports local programming debugging and Modbus RTU communication with HMI/SCADA for remote parameter monitoring and fault data upload; expansion communication modules realize distributed multi-PLC networking data interaction.


3.4 Hardware Watchdog & Full-Range Self-Diagnosis

Full-channel self-test after power-on covers CPU, memory, backplane bus, communication and battery; runtime real-time monitoring of program runaway, I/O disconnection, low battery and communication failure triggers automatic system reset and fault log storage for troubleshooting.


3.5 Power-Failure Data Protection & Time Retention

User programs are permanently stored in Flash; the backup lithium battery retains RTC clock and process variables to avoid parameter loss after power failure, ensuring continuous and stable production process after restart.


IV. Working Principle


IC693CPU340 operates based on cyclic scan execution + backplane I/O data interaction + serial communication data exchange.After power-on and hardware self-test, the CPU loads user programs from Flash and enters RUN mode. Each scan cycle includes three steps: reading input status from I/O modules via backplane bus, executing user control logic, and transmitting output instructions to field actuators. The serial port responds to upper computer read-write commands for program debugging and data upload. Once program abnormality occurs, the hardware watchdog resets the system and records fault information; the lithium battery locks all key operating data immediately after power failure to prevent loss.


V. Application Scenarios


  1. Environmental Protection: Municipal sewage & water treatment pump-valve interlock, chemical dosing process control;
  2. General Machinery: Packaging, textile, small CNC equipment and conveyor line sequential control;
  3. Building HVAC: Central air conditioning temperature & humidity regulation, fan & pump frequency conversion monitoring;
  4. Power Auxiliary System: Substation DC panel, factory low-voltage distribution and boiler auxiliary machine sequential startup control;
  5. Automation Renovation: Replace faulty 90-30 series CPU, fully compatible with original backplane, I/O modules and existing engineering programs.

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