Description

The GE IC687BEM731-AB is a critical communication and control interface module from the renowned GE Fanuc Series 90-70 programmable logic controller (PLC) family. This module serves as a Genius Bus Controller, acting as the vital link between the central 90-70 PLC processor and the distributed Genius I/O system. The primary function of the GE IC687BEM731-AB is to manage high-speed, peer-to-peer data exchange and control across the Genius bus network, enabling a highly responsive and distributed control architecture. By interfacing with remote Genius I/O blocks, it allows the PLC to monitor sensors and command actuators over a single, robust twisted-pair cable, significantly reducing wiring complexity and installation costs. The GE IC687BEM731-AB is designed for installation in a Series 90-70 rack, where it operates under the control of the main CPU. Its role is indispensable in creating scalable and modular automation systems, providing deterministic performance essential for complex industrial processes. The integration of the GE IC687BEM731-AB into a control system enhances data integrity, simplifies troubleshooting, and provides a robust foundation for distributed I/O management.

GE IC687BEM731-AB

Technical Specifications

Main Features and Advantages

The GE IC687BEM731-AB offers a suite of powerful features that make it a cornerstone for distributed control. Its core capability is managing the high-integrity Genius bus network, which provides deterministic I/O scanning and peer-to-peer messaging between controllers. This ensures that critical process data is exchanged predictably and without collision, a vital requirement for real-time control applications.

Enhanced System Diagnostics and Reliability: A significant advantage of the GE IC687BEM731-AB is its comprehensive diagnostic coverage. It continuously monitors the health and status of all devices on its Genius bus segment, providing detailed fault information to the PLC programmer. This allows for rapid identification of issues such as module failures, network shorts, or communication errors, drastically reducing system downtime. The bus itself is designed with built-in fault tolerance, and the module’s robust electrical isolation protects the central PLC rack from electrical transients on the field bus.

Simplified Configuration and Scalability: The GE IC687BEM731-AB is configured using standard GE Fanuc programming software (such as Proficy Machine Edition Logic Developer), making it easy to set up and integrate into an existing control strategy. Its ability to support a large number of distributed I/O drops from a single slot in the main rack offers exceptional system scalability. This allows engineers to expand I/O capacity without consuming additional central rack slots, providing a cost-effective and flexible architecture for growing automation needs. The proven design of the GE IC687BEM731-AB ensures long-term stability and interoperability within the extensive Series 90-70 and Genius ecosystem.

Application Field

The GE IC687BEM731-AB finds its primary application in medium to large-scale industrial automation systems that utilize the GE Fanuc Series 90-70 platform and require distributed I/O control. In Manufacturing and Automotive assembly lines, it is used to coordinate complex sequences of operations across vast factory floors, connecting the central PLC to remote panels of sensors and actuators. The Water and Wastewater Treatment industry relies on the GE IC687BEM731-AB to manage processes spread over large geographical areas, such as controlling pump stations, valve actuators, and chemical feed systems from a central control room.

Within the Oil & Gas sector, this module is employed in pipeline monitoring and control (SCADA) systems, where it gathers data from remote terminal units (RTUs) along the pipeline. It is also well-suited for Material Handling systems in distribution centers and for Machine Control on large, complex production machinery where I/O points are distributed across the equipment. The GE IC687BEM731-AB solves the critical challenge of centralizing control logic while physically distributing I/O, leading to cleaner panel designs, reduced installation costs, and more maintainable systems.

GE IC687BEM731-AB

Related Products

GE IC693BEM331: A similar Genius Bus Controller module designed for the earlier Series 90-30 PLC platform.

GE IC697BEM731: The equivalent Genius Bus Controller for the higher-performance Series 90-70 and later RX7i platforms.

GE Fanuc Genius I/O Blocks (e.g., IC660BBB020, IC660BBD102): The various input, output, and analog modules that are controlled by the IC687BEM731-AB on the Genius bus.

GE IC690CPU700: A typical CPU module for the Series 90-70 system that would be housed in the same rack as the IC687BEM731-AB.

GE Series 90-70 Power Supply (e.g., IC697PWR711): The power supply unit that provides stable power to the rack containing the IC687BEM731-AB.

GE IC687CHS117: A 17-slot rack that can house the IC687BEM731-AB module and other Series 90-70 components.