Purchase now IC697BEM731 GE Fanuc Genius Bus Controller
Purchase now IC697BEM731 to establish a highly resilient and deterministic communication backbone across your entire factory floor. The GE Fanuc IC697BEM731 is a sophisticated Genius Bus Controller (GBC) module designed to seamlessly integrate the Series 90-70 Programmable Logic Controller into the powerful Genius I/O distributed network. Acting as the undisputed communication master of the bus, this module facilitates the lightning-fast exchange of critical control data between the central VME rack and up to 31 remote Genius I/O blocks, variable frequency drives, operator interfaces, or other peer PLCs on the network. Operating on a highly robust token-passing protocol at speeds up to 153.6 Kbaud, the IC697BEM731 ensures absolutely deterministic data delivery. This level of synchronized communication is vital for time-critical factory automation tasks, coordinated motion control, and extensive global data sharing between multiple machine cells. Upgrading or replacing a faulty GBC with this authentic OEM part guarantees that your distributed network remains immune to costly data collisions and communication timeouts.
Core Technical Specifications
- Part Number: IC697BEM731
- Manufacturer: GE Fanuc
- Product Series: Series 90-70 PLC
- Module Type: Genius Bus Controller (GBC)
- Maximum Network Devices: Up to 31 active devices per controller
- Communication Protocol: Genius token-passing network
- Baud Rates: Selectable up to 153.6 Kbaud
- Network Span: Supports cable runs up to 7,500 feet (at lower baud rates)
Expert Installation and Network Termination Tips
The physical layer of a Genius network requires meticulous attention to wiring topology. The IC697BEM731 must be connected to field devices using a strict daisy-chain wiring method. Never use star topologies or long drop lines (T-taps), as these create signal reflections that will corrupt the data packets and cause intermittent network drops. The most critical aspect of setting up this Genius Bus Controller is proper termination. You must install a terminating resistor at both physical ends of the communication cable run. Depending on the specific impedance of the twinaxial or twisted-pair cable you are using, this resistor is typically 75, 100, or 150 ohms. Failure to terminate the network properly will result in bouncing signals, leading the IC697BEM731 to register massive communication errors and potentially halt the PLC logic.
Frequently Asked Questions (FAQs)
What does it mean if the COMM OK LED on the IC697BEM731 is flashing? A flashing COMM OK LED generally indicates that the bus controller is active and passing the token, but it is experiencing intermittent communication errors with one or more devices on the network. This is often traced back to degraded cable shielding, loose terminal connections on a remote I/O block, or missing termination resistors.
Can I use multiple Genius Bus Controllers in a single Series 90-70 rack? Yes. For large-scale manufacturing facilities that require thousands of distributed I/O points, you can install multiple IC697BEM731 modules in the same VME backplane. Each module will manage its own independent Genius network, vastly expanding the control capabilities of the single CPU.
How does this module share data with other PLCs? The module supports GE Fanuc’s «Global Data» broadcasting feature. This allows the IC697BEM731 to automatically transmit specific memory addresses to the network, where any other PLC equipped with a Genius controller can read the data instantly without requiring complex messaging logic.
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