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The GE Fanuc IC687RCM711 is a critical Rack Controller Module designed for the GE Fanuc Series 90-70 PLC system. This module serves as the central intelligence and communication hub for the entire rack, orchestrating the operation of all other installed modules, including CPU, I/O, and specialty cards. Its primary function is to manage the backplane data exchange, execute the control logic stored in memory, and facilitate communication with programming terminals and upstream systems via the integrated serial port. The GE Fanuc IC687RCM711 is a key component of the rugged and reliable Series 90-70 platform, which is engineered for high-performance applications requiring fast scan times, deterministic operation, and a large I/O capacity. The value of this controller lies in its powerful processing capabilities and robust architecture, which provide a stable and dependable foundation for complex automation tasks in demanding industrial environments, ensuring seamless control and high availability.
IC687RCM711 GE
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | IC687RCM711 |
| Manufacturer | GE Fanuc (now part of Emerson) |
| Product Type | Rack Controller Module (CPU) |
| Backplane Compatibility | Series 90-70 5-slot or 10-slot VME rack |
| Memory Capacity | 768 Kbytes user logic, 1 Mbyte data memory |
| Execution Speed | 10 ms/K for Boolean instructions |
| I/O Capacity | Supports up to 512 local I/O points (discrete) and 192 analog points |
| Integrated Communications | RS-232/-422/-485 serial port (SNP, SNPX protocol) |
| Optional Communications | Supports Genius LAN, PROFIBUS-DP, Ethernet via dedicated modules |
| Battery Backup | Integrated lithium battery for RAM memory backup |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| Storage Temperature | -40 to 85 °C (-40 to 185 °F) |
| Relative Humidity | 5% to 95% non-condensing |
| Power Consumption | 1.5A @ 5V DC (from backplane) |
Main Features and Advantages
The GE Fanuc IC687RCM711 is engineered for high performance and reliability in industrial settings. It features a powerful 32-bit microprocessor that delivers fast execution of complex control logic, which is essential for applications requiring rapid response times and precise timing. A significant advantage is its substantial memory capacity, allowing for the implementation of extensive user programs and the storage of large volumes of process data directly on the controller. The module includes a versatile integrated serial port that supports multiple physical media (RS-232/-422/-485) and GE’s proprietary SNP and SNPX protocols, enabling straightforward connectivity for programming, diagnostics, and peer-to-peer communication.
For expanded connectivity, the GE Fanuc IC687RCM711 seamlessly interfaces with a wide array of dedicated network interface modules, such as Genius Bus Controller and Ethernet modules, allowing for easy integration into distributed control architectures. Its design emphasizes robustness, with a wide operating temperature range and protection against electrical noise common in industrial plants. The controller also supports hot backup redundancy configurations with the IC697CHS750 module, ensuring maximum system uptime for critical processes. This combination of power, flexibility, and resilience makes the GE Fanuc IC687RCM711 a trusted choice for complex automation solutions.
Application Field
The GE Fanuc IC687RCM711 is deployed in a vast range of industries that demand a robust and scalable mid-to-high-end PLC solution. In manufacturing automation, it is commonly found controlling complex assembly lines, robotic cells, and material handling systems, where its fast processing speed and large I/O capacity manage thousands of sensors and actuators. Within the water and wastewater treatment sector, the GE Fanuc IC687RCM711 is ideal for controlling filtration processes, pump stations, and chemical feed systems, thanks to its reliability and support for both discrete and analog control.
The energy sector, including power generation and distribution, utilizes this controller for turbine control, switchgear sequencing, and substation automation. Its ability to operate in harsh environments and support redundant configurations makes it suitable for these critical infrastructure applications. Furthermore, the GE Fanuc IC687RCM711 is a solid foundation for machine builders creating large, custom industrial machines that require sophisticated control, data logging, and connectivity to plant-wide monitoring systems.
IC687RCM711 GE
Related Products
IC697CPU781: A higher-end CPU module for the Series 90-70 family with expanded memory and faster execution speed.
IC697PWR711: A power supply module designed specifically for the Series 90-70 racks.
IC693ACC300: A typical 16-point discrete input module that would be used in a rack controlled by the RCM711.
IC693MDL645: A typical 16-point discrete output module compatible with the system.
IC697BEM731: A Genius Bus Controller Module, allowing the IC687RCM711 to communicate on a Genius LAN network.
IC697CHS750: A Redundancy Support Module, enabling hot-backup redundant controller configurations for fault tolerance.
IC690ACC901: A VME Rack (10-slot) designed to house the IC687RCM711 and other modules.
IC647GBM001: A Genius Bus Monitor interface module for diagnostics and configuration.
