Description

Brief Product Description

The GE Fanuc IC697BEM731 is a high-performance Genius Bus Controller (GBC) designed for the Series 90-70 PLC platform. This module manages token-passing communications for up to 30 distributed devices, enabling robust data exchange across long industrial cable distances.

Advanced Network Management and Topology

The GE Fanuc IC697BEM731 serves as the primary communication hub for Genius I/O networks within a Series 90-70 PLC rack. By utilizing a deterministic token-passing protocol, the module coordinates data traffic for as many as 30 separate bus devices. Each controller features a dedicated interface channel and a Hand-Held Monitor (HHM) port, which simplifies local diagnostics and system configuration. While the module ships without a pre-set bus address, engineers typically utilize MS-DOS or Windows-based configuration utilities to assign the standard default address of 31. This flexibility allows for rapid integration into existing network architectures without extensive hardware manual adjustment.

Scalable Communication and Distances

System designers can optimize the IC697BEM731 for various physical plant layouts by adjusting the baud rate to match required cable lengths. The module supports four distinct operating modes that dictate the maximum transmission range. At the standard 153.6 Kbaud rate, the network covers up to 2,000 feet, while the extended 153.6 Kbaud setting reaches 3,500 feet. For larger facilities, the controller supports lower speeds of 76.8 Kbaud and 38.4 Kbaud, extending the total bus length to 4,500 feet and 7,500 feet respectively. To maintain network stability, all connected nodes must operate at a synchronized baud rate using high-quality shielded twisted-pair cabling, such as Belden 9182.

System Integration and Diagnostics

Reliability in the IC697BEM731 is enhanced through proactive fault detection and integrated self-diagnostics. The module continuously monitors the health of the Genius bus and reports errors directly to the PLC’s internal alarm queue, allowing for rapid troubleshooting of wiring or device failures. Furthermore, the unit facilitates global data transmission, enabling different CPUs on the same network to share synchronized data registers. Local status LEDs provide immediate visual confirmation of both module “OK” status and active bus communication. These features ensure that the IC697BEM731 remains a cornerstone of scalable and secure industrial automation networks.

Key Technical Characteristics

• Multi-Device Support: Manages communications for up to 30 distributed Genius I/O devices or other controllers.
• Flexible Baud Rates: Selectable speeds from 38.4 Kbaud to 153.6 Kbaud to balance speed and distance.
• Long-Range Connectivity: Supports maximum bus lengths of up to 7,500 feet using specialized industrial cabling.
• Software Configuration: Allows for easy setup of serial bus addresses and network parameters via standard GE software.
• Global Data Exchange: Enables high-speed synchronization of data between multiple PLC systems on the same bus.
• Integrated HHM Port: Provides a dedicated connection point for Hand-Held Monitors to facilitate field service.

Technical Specifications