Technical Specifications
- Manufacturer: GE Fanuc (GE-Emerson)
- Series: 90-70
- Processor: 12 MHz 80C186 microprocessor (equivalent to 90% of IBM AT performance)
- Onboard Memory: 96 KB battery-backed CMOS logic and data memory
- Expansion Memory: Supports up to 512 KB optional expansion memory
- Serial Ports: 2 ports, configurable for RS-232, RS-422, or RS-485
- Baud Rate: Up to 9.6 Kbaud (simultaneous on both ports); up to 19.2 Kbaud (individual port)
- Programming Tools: IC647, IC640, or IBM-compatible PC with PCM Development Software
- Current Consumption: 1.0 Amp
- Configuration: Software-configurable (no DIP switches or jumpers)
- Status Indicators: 3 status LEDs, 1 reset pushbutton
- Real-Time Clock: Synchronized with PLC real-time calendar clock
- Battery Life: 10 years at 20°C (68°F)
Key Features
- High-Performance Coprocessing: Offloads real-time computations, complex math operations, and control algorithms from the main PLC CPU.
- Dual-Tasking Capability: Executes two independent tasks simultaneously, optimizing multitasking performance.
- Flexible Communication: Dual serial ports support multiple protocols (RS-232/422/485) for seamless connectivity with HMI, SCADA, and third-party devices.
- Extensive Memory Support: 96 KB onboard battery-backed memory ensures data retention during power loss; 512 KB expansion enables large-scale data logging and program storage.
- Simplified Configuration: Software-based configuration via MS-DOS or Windows tools eliminates hardware adjustments.
- Seamless PLC Integration: Communicates via the PLC backplane with direct access to PLC user and system memory.
- Robust Reliability: Industrial-grade design with long battery life and status monitoring LEDs for easy maintenance.
Application Scenarios
- Industrial Process Control: Used in chemical, metallurgical, power, and water treatment industries for real-time monitoring, closed-loop control, and data logging.
- Manufacturing Automation: Supports assembly lines, robotics control, and CNC machinery by handling motion control algorithms and operator interface tasks.
- Data Acquisition & Communication: Collects data from sensors/field devices, processes it, and transmits to SCADA/HMI systems or remote terminals via serial links.
- Building Automation: Manages HVAC systems, lighting control, and security systems with complex logic and real-time response requirements.
- Legacy System Upgrades: Enhances performance of existing GE 90-70 PLC systems without full hardware replacement, extending operational lifespan.
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