GE IC660ELB912G | Interface Module Genius Bus Controller

The GE IC660ELB912G manages communication between a PLC and Genius I/O blocks. This interface module serves as the bus controller for distributed I/O networks. You can use it with GE Fanuc Series 90-30, 90-70, or 9070 PLCs. The unit connects up to 31 Genius devices on a single network.

Network and Communication Specifications

Parameter	Specification
Brand	GE Fanuc (General Electric)
Model	IC660ELB912G
Product Type	Interface Module (Bus Controller)
Network Protocol	Genius I/O bus
Maximum Devices	31 (I/O blocks or other controllers)
Baud Rate	153.6 kbps (fixed)
Maximum Distance	2,500 meters (with repeaters)
Cable Type	Shielded twisted pair (Belden 9182)
Scan Rate	5 ms typical per 8 devices
Isolation Voltage	1500 VAC (bus to logic)

The GE IC660ELB912G controls all Genius I/O blocks on a single bus network. This interface module communicates at a fixed 153.6 kbps baud rate. You can place I/O blocks up to 2,500 meters away with repeaters. The unit scans 8 I/O blocks in approximately 5 milliseconds.

Physical Dimensions and Weight

Parameter	Specification
Weight	0.38 kg (0.84 lbs)
Height	140 mm
Width	43 mm (1 slot)
Depth	132 mm
Mounting	Series 90-30 or 90-70 rack
Connector Type	5-pin female (Genius bus)
Component Count	124 discrete parts

This interface module weighs 0.38 kg for secure rack installation. The unit occupies a single slot in a Series 90-30 or 90-70 chassis. Its width reaches 43 mm for standard I/O density. You can insert the GE IC660ELB912G alongside CPU or I/O modules.

Interface and Connection Points

A 5-pin female connector provides the Genius bus interface connection. The front panel includes two rotary switches for bus address setting (0 to 31). You will find three LED indicators for bus status, module health, and power. A 9-pin D-sub connector supports a hand-held monitor for troubleshooting. A 3-position terminal block accepts 24 VDC power input.

Energy Storage and Internal Circuitry

The GE IC660ELB912G stores minimal energy for bus signal buffering. Small capacitors provide 47 µF of total storage for the communication controller. The module does not contain any battery for configuration retention. Instead, it reads all address settings from the rotary switches at power-up. Four optocouplers provide isolation between the backplane and bus transceiver.

Component Layout and Construction

A dedicated Genius bus controller ASIC handles all protocol management. The module includes a line driver and receiver for twisted pair cable. You will find 48 resistors, 36 capacitors, and 8 integrated circuits on the board. The GE IC660ELB912G contains a DC-DC converter for internal power regulation. A metal shield covers the transceiver section for electromagnetic interference reduction.

Operational Use and System Integration

Transitioning to this module expands your distributed I/O capabilities significantly. You can place Genius blocks near field devices for shorter wiring runs. The module works with all Genius I/O blocks including discrete, analog, and specialty modules. Use the GE IC660ELB912G for large conveyor systems, batch processes, or distributed pump stations. For best results, terminate both ends of the Genius bus with 100-ohm resistors.