GE Fanuc IC660ELB912G Genius I/O Bus Controller Interface Module

The GE Fanuc IC660ELB912G, also cataloged as the IC660ELB912 Interface Module (Bus Controller), operates as a dedicated hardware component for localized module interconnections and backplane power distribution within GE Fanuc Series 90-30 and 90-70 platforms. It manages communication between host PLC processors and up to 31 Genius I/O blocks or controller nodes across a single shielded twisted-pair network, executing cyclic scan transfers at a fixed 153.6 kbps baud rate.

Hardware Specifications

Deterministic Network and High-Density Expansion

The IC660ELB912G bus controller maintains high backplane bus communication velocity across Series 90-30 and 90-70 backplane architectures, transferring network I/O data to the CPU with typical scan rates of 5 ms per 8 devices. By supporting continuous I/O density scaling up to 31 drop addresses, the module ensures deterministic data throughput across distances up to 2500 meters using signal repeaters. Internal transceiver design and firmware flash compatibility maintain consistent timing, protocol isolation, and seamless node addressing without introducing scan jitter to the host PLC.

Frequently Asked Questions

Q: How is the Genius network address configured on the IC660ELB912G interface module?

A: The bus address (range 0 to 31) is configured using two rotary switches located on the module front panel.

Q: What level of electrical isolation does the IC660ELB912G provide between field network lines and backplane logic?

A: The module incorporates internal isolation barriers rated for 1500 VAC between the Genius bus communication circuitry and the backplane logic.

Q: Can the IC660ELB912G module be installed in both Series 90-30 and Series 90-70 racks?

A: Yes, the 1-slot form factor is designed for direct mounting into either GE Fanuc Series 90-30 or Series 90-70 rack slots.

Field Installation Guidelines

1. Insert the IC660ELB912G module into a designated rack slot of the Series 90-30 or 90-70 chassis and engage the retaining mechanism.
2. Ensure power to the rack chassis and 24 VDC auxiliary supply lines is completely turned off prior to inserting or removing the module.
3. Wire the Genius network using Belden 9182 shielded twisted-pair cable connected to the 5-pin female front connector.
4. Set the two front-panel rotary switches to an unused node address between 0 and 31 before initializing the bus controller.
5. Terminate both physical ends of the Genius bus cable run with standard termination resistors to suppress line reflections and noise.