GE IC695CRU320-BB Redundant PAC: High-Availability RX3i Controller

The GE IC695CRU320-BB is a high-performance Redundant Programmable Automation Controller (PAC) from GE Fanuc (now GE Automation & Controls), part of the renowned PACSystems RX3i series. Engineered for mission-critical industrial environments, this controller ensures maximum system uptime and safety. It is the preferred choice for industries such as metallurgy, oil and gas, manufacturing, and advanced robotics where downtime is not an option.

This article provides a detailed overview of the technical specifications, core features, and typical applications of the IC695CRU320-BB.

1. Key Technical Specifications of the IC695CRU320-BB

Understanding the hardware capabilities of the RX3i Redundant PAC is essential for system integrators and engineers.

• Processor Performance: At its core, the module utilizes an Intel Celeron M processor clocked at 1 GHz. This provides the robust computational power necessary for complex logic and data processing tasks.
• Memory and Data Retention:
  • RAM: Equipped with 64 MB of battery-backed RAM, ensuring critical data is preserved during a power outage.
  • Flash Memory: Includes 64 MB of non-volatile flash memory. This guarantees that the firmware, program logic, and configuration data remain safe and intact even when the system is powered down without a battery.
• Control Capacity: The controller supports a substantial memory structure capable of handling up to 512 program blocks, with each block size reaching up to 128 KB. This makes it suitable for complex logic, motion control, and data-intensive applications.
• Integrated Communication Ports: It features two RS-232/RS-485 serial ports, providing flexible connectivity for legacy field devices, Human-Machine Interfaces (HMIs), and remote terminal units (RTUs).
• Physical and Environmental Specifications: The IC695CRU320-BB is built for rugged industrial environments. It typically operates within a temperature range of 0°C to 55°C (with some sources indicating an extended range of -20°C to 60°C). It features an IP20 protection rating and has a typical power consumption of approximately 10 Watts.

2. Core Features and Advantages of the Redundant PAC

The defining characteristic of the IC695CRU320-BB is its redundancy capability, but it offers several other high-value features:

• Redundant Hot-Standby Operation: This is the standout feature. The module supports a primary-backup controller configuration. In the event of a primary controller failure, the system performs an automatic bumpless switchover to the standby unit. The switch is exceptionally fast, completing in approximately 3.133 milliseconds—often within a single logic scan cycle—ensuring uninterrupted process control.
• High-Speed Backplane Data Transfer: Mounted directly onto the RX3i backplane via a PCI slot (supporting PCI 2.2 and higher), it enables high-speed communication. It supports 2 MB data transfers, facilitating rapid handling of distributed I/O and reducing system latency.
• Backward Compatibility and Scalability: One of the major advantages of the RX3i platform is its compatibility with the legacy 90-30 Series I/O modules. This allows end-users to phase out old hardware gradually, protecting their existing investment while upgrading to modern control architecture.
• Unified Programming Environment: The controller is programmed and configured using the powerful Proficy Machine Edition (PME) software. PME supports all five languages defined in the IEC 61131-3 standard, including Ladder Logic (LD), Structured Text (ST), and Function Block Diagram (FBD), providing flexibility for programmers of all backgrounds.

3. Typical Applications in Key Industries

Thanks to its high reliability, fast switchover times, and robust design, the GE IC695CRU320-BB is deployed in some of the most demanding industrial sectors:

• Power Generation: Used in power plant main control systems where constant uptime is critical for grid stability.
• Oil, Gas, and Chemical: Ideal for refining, pipeline monitoring, and chemical process control where failures can lead to safety hazards and financial loss.
• Metals and Mining: Suited for steel mills, aluminum smelters, and mining operations that operate in harsh, high-temperature, and high-vibration environments.
• Advanced Robotics and Manufacturing: Employed in high-speed production lines that demand precise synchronization and exacting motion control to maintain product quality and throughput.