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AEG PC-A984

  • Product Introduction: AEG PC-A984 is a high-performance central processing unit (CPU) module designed as the core of the Modicon 984 series PLC systems, engineered for medium to large-scale industrial automation and process control applications. The CPU features a 32-bit RISC processor, high-capacity on-board memory, multi-protocol communication support and a high-speed backplane bus interface, delivering fast program execution and real-time I/O data processing. It supports IEC 61131-3 programming standards, built-in diagnostic functions and redundant power supply input, with a rugged industrial design optimized for 24/7 continuous operation in harsh environments. The PC-A984 is the primary control component for Modicon 984 series PLC systems, enabling complex control logic, sequential process control and integration with industrial networks in factory automation, process control and building automation applications.
  • Technical Specifications:
    • Processor: 32-bit industrial RISC processor, 80 MHz clock speed
    • Program Execution Speed: 0.1 μs per boolean instruction, 0.5 μs per floating-point instruction
    • On-Board Memory: 2 MB Flash program memory (non-volatile), 1 MB RAM data memory, expandable via AS-M996-000 memory module
    • Supported Programming Standards: IEC 61131-3 (Ladder Logic, Function Block Diagram, Structured Text, Sequential Function Chart, Instruction List)
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Detailed content

    • I/O Capacity: Up to 2048 digital I/O points, up to 256 analog I/O points (via expansion chassis)
    • Backplane Interface: Modicon 984/900 series proprietary high-speed bus, 20 Mbps data transfer rate
    • Communication Interfaces: On-board RS-485 (Modbus RTU/ASCII), optional Ethernet/IP/Profibus-DP communication module support
    • Communication Capacity: Up to 32 simultaneous Modbus master/slave connections
    • Power Supply Input: Redundant 24 V DC input (18-30 V DC), reverse polarity protection
    • Built-In Diagnostics: Real-time self-diagnosis (CPU, memory, backplane, communication), I/O fault diagnosis, power fault diagnosis
    • Fault Handling: Programmable fault detection and response, automatic program backup, restart options (warm/cold/auto)
    • Status Indicators: Multi-color LED indicators (CPU power, run/stop, program mode, memory fault, communication fault, I/O fault)
    • Operating Temperature: -25°C to +70°C
    • Storage Temperature: -40°C to +85°C
    • Vibration Resistance: 5-50 Hz, 1 g acceleration (IEC 60068-2-6); shock resistance 15 g, 11 ms (IEC 60068-2-27)
    • Protection Class: IP20 (cabinet-mounted)
    • Dimensions: 80 mm (W) × 160 mm (H) × 60 mm (D)
    • Weight: 0.8 kg
    • Compliance: IEC 61131-3, IEC 61000-6-2 (EMC), CE, RoHS, UL 508
  • Functional Features:
    • 32-bit 80 MHz RISC processor delivers ultra-fast program execution (0.1 μs per boolean instruction), enabling complex control logic and high-speed sequential process control for medium to large-scale automation applications. On-board non-volatile Flash program memory (2 MB) retains control programs during power outages, with no battery required, eliminating maintenance and data loss from battery failure. Expandable memory via the AS-M996-000 module enables large program storage and long-term data logging for complex applications requiring extensive control logic and process data collection. Support for all IEC 61131-3 programming languages provides maximum flexibility for programmers, enabling the use of the most suitable language for specific control tasks (e.g., ladder logic for discrete control, structured text for complex math). Redundant 24 V DC power input ensures uninterrupted CPU operation even if one power source fails, critical for mission-critical process control and safety instrumented systems (SIS). Real-time built-in diagnostics and fault handling provide comprehensive system monitoring, with programmable fault responses enabling custom safety actions (e.g., machine stop, alarm triggering) for different fault conditions. On-board Modbus RS-485 communication and support for optional industrial Ethernet/fieldbus modules enable seamless integration into industrial networks, facilitating centralized monitoring and control via HMI/SCADA systems. High-speed 20 Mbps backplane bus interface ensures real-time I/O data processing and synchronization, critical for high-speed automation and motion control applications with fast-acting I/O devices. The CPU supports up to 2048 digital and 256 analog I/O points (via expansion chassis), making it suitable for medium to large-scale automation systems in factory and process control. Rugged industrial design with wide temperature tolerance and vibration/shock resistance ensures 24/7 continuous operation in harsh industrial environments, including manufacturing plants, chemical processing facilities and mining sites. Automatic program backup and configurable restart options (warm/cold/auto) minimize downtime after power outages or system faults, enabling fast system recovery and resumption of operation.
  • Application Scenarios:
    • Medium to large-scale factory automation systems (e.g., automotive assembly lines, packaging plants) requiring complex discrete and sequential control logic. Process control applications in chemical and petrochemical plants for monitoring and controlling continuous and batch processes with multiple analog and digital I/O points. Building automation systems for large commercial and industrial buildings, controlling HVAC, lighting, access control and fire safety systems with integrated communication to BMS. Water and wastewater treatment plants for controlling multi-stage treatment processes, pumps, valves and monitoring systems with redundant power for uninterrupted operation. Food and beverage production for large-scale batch process control, complying with HACCP and food safety standards with precise analog and digital control. Power generation and distribution facilities for controlling auxiliary equipment, transformers and switchgear with real-time diagnostics and fault handling. Mining and mineral processing for controlling material handling systems, crushers and conveyor belts with rugged design for high-vibration mine site environments. Marine and offshore platform automation systems for controlling shipboard and platform equipment, with redundant power and rugged construction for salt-laden and vibration-prone environments. Semiconductor and electronics manufacturing for controlling clean room equipment and fabrication processes with high-speed program execution and real-time I/O processing.

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