GE VMIVME-7700RC
GE VMIVME-2120
GE VMIVME-2120

GE IC697VRM015 | Series 90-70 PLC Fiber-Optic Reflective Memory Board

  • Brand: GE (General Electric)
  • Model: IC697VRM015 (Variant of Series 90-70 PLC Family)
  • Product Type: Fiber-Optic Reflective Memory Board
  • Series: Series 90-70 (GE Fanuc Legacy Industrial Automation)
  • Core Function: Enables high-speed, low-latency data sharing between multiple nodes in GE Fanuc 90-70 PLC systems using fiber-optic technology. It acts as a “data mirror” to synchronize memory across distributed control architectures, critical for real-time industrial automation.
  • Key Specs:
    • Bus Compatibility: VMEbus Rev. C.1 (supports A24/A32 addressing)
    • Memory: 256 Kbyte onboard SRAM (global shared memory)
    • Data Transfer Rate: Up to 6.2 Mbyte/s (non-redundant), 3.2 Mbyte/s (redundant)
    • Nodes Supported: Up to 256 nodes per network
    • Distance Between Nodes: Up to 2,000 meters (fiber-optic cable)
    • Latency: 400–750 nanoseconds (deterministic)
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Part number: IC697VRM015
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Description

IC697VRM015: Product Overview​
The GE IC697VRM015​ is a fiber-optic reflective memory board designed for GE Fanuc’s Series 90-70 PLC family, a legacy platform renowned for its reliability in industrial automation. As part of the Series 90-70 ecosystem, it addresses the need for real-time data synchronization​ in distributed control systems—where multiple PLCs, HMIs, or computers must share data with minimal delay.
Role in Automation Systems:
Positioned as a “network backbone” in Series 90-70 architectures, the IC697VRM015 performs two primary functions:
  1. Data Mirroring: Writes data to onboard SRAM, which is automatically replicated to the same memory location in all connected nodes (via fiber-optic links). This eliminates the need for software-based data transfer protocols (e.g., TCP/IP), reducing latency and CPU overhead.
  2. Interrupt Handling: Supports user-definable interrupts to notify nodes of data changes, enabling real-time responses to events (e.g., turbine overspeed, valve actuation).
Core Functionality:
  • Fiber-Optic Technology: Uses 170 Mbaud serial fiber-optic links for high-speed, noise-immune communication. This is critical for industrial environments with high electromagnetic interference (EMI).
  • Redundant Mode: Optional redundant data transfer (dual fibers) ensures data integrity in mission-critical applications (e.g., power generation, where downtime is costly).
  • VMEbus Compatibility: Conforms to VMEbus Rev. C.1, allowing seamless integration with existing Series 90-70 I/O racks and controllers (e.g., IC697CPU731).
  • Deterministic Latency: Fixed latency (400–750 ns) ensures predictable data transfer, essential for real-time control algorithms (e.g., PID loops, turbine governor control).
Platform Benefits (Series 90-70):
The IC697VRM015 inherits the Series 90-70 platform’s strengths, including:
  • Reliability: The Series 90-70 system is the industry standard for industrial automation, with a proven track record of 24/7 operation in power plants, refineries, and manufacturing facilities worldwide.
  • Legacy Compatibility: The board works with existing Series 90-70 components (e.g., I/O modules, power supplies), reducing the cost of system upgrades.
  • Scalability: Supports expansion to 256 nodes, making it suitable for large-scale distributed control systems (e.g., multi-turbine power plants).

    GE VMIVME-7700RC

    GE VMIVME-7700RC

Technical Specifications​
  • Model Number: IC697VRM015 (Variant of Series 90-70 PLC Family)
  • Manufacturer: GE (General Electric)
  • Product Type: Fiber-Optic Reflective Memory Board
  • Series: Series 90-70 (Industrial Automation)
  • Bus Standard: VMEbus Rev. C.1 (A24/A32 addressing, D32/D16/D8 data transfer)
  • Onboard Memory: 256 Kbyte SRAM (global shared memory)
  • Data Transfer Rate:
    • Non-redundant: Up to 6.2 Mbyte/s
    • Redundant: Up to 3.2 Mbyte/s
  • Nodes Supported: Up to 256 nodes per network
  • Distance Between Nodes: Up to 2,000 meters (fiber-optic cable)
  • Latency: 400–750 nanoseconds (deterministic)
  • Fiber-Optic Link: 170 Mbaud serial (multimode/single-mode supported)
  • Interrupts: User-definable vectors (supports up to 256 interrupts)
  • Operating Temperature: 0°C to +60°C (industrial-grade)
  • Storage Temperature: -40°C to +85°C
  • Humidity: 5–95% non-condensing
  • Weight: ~0.5 kg (1.1 lbs)
  • Certifications: CE, UL (inferred from GE industrial product standards)
Core Features & Customer Value​
1. High-Speed Data Sharing:
The IC697VRM015’s 6.2 Mbyte/s transfer rate (non-redundant) enables real-time synchronization of large datasets (e.g., turbine sensor data, process variables) across multiple nodes. This is critical for applications like power generation, where turbine speed must be monitored and adjusted in milliseconds.
2. Deterministic Latency:
Fixed latency (400–750 ns) ensures that data arrives at all nodes at the same time, eliminating timing errors in control algorithms. For example, in a manufacturing plant, this ensures that robotic arms move in sync with conveyor belts, preventing collisions.
3. Noise Immunity:
Fiber-optic links are immune to EMI, which is common in industrial environments (e.g., near motors, transformers). This ensures reliable data transfer even in harsh conditions, reducing downtime due to communication errors.
4. Scalability:
Support for up to 256 nodes makes the IC697VRM015 suitable for large-scale distributed control systems. For instance, a multi-turbine power plant can use the board to connect all turbine controllers to a central HMI, enabling centralized monitoring and control.
5. Redundant Mode:
Optional redundant data transfer (dual fibers) ensures data integrity in mission-critical applications. If one fiber fails, the other takes over automatically, preventing data loss or system downtime.

GE VMIVME-7700RC

GE VMIVME-7700RC

Typical Applications​
The GE IC697VRM015​ is widely used in industrial automation systems for:
  1. Power Generation:
    • Synchronizes data between turbine controllers, generators, and HMIs in gas/steam turbine power plants.
  2. Manufacturing:
    • Connects PLCs, robots, and conveyor systems in automotive/electronics manufacturing lines.
  3. Petrochemical Industry:
    • Enables real-time monitoring of refinery equipment (e.g., distillation columns, pumps) from a central control room.
  4. Water Treatment:
    • Synchronizes data between water quality sensors, pumps, and valves in water treatment plants.

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