GE IC660ELB905R Genius Bus Controller Module

The GE IC660ELB905R, also cataloged as the IC660ELB905 Genius Network Interface Module, operates as a dedicated hardware component for peer-to-peer data exchange and Genius LAN communication execution within Series 90-70 VME Backplane platforms. Utilizing a single 15-pin D-sub female connector, the module establishes high-speed deterministic bus interfacing to link up to 32 Genius I/O devices or host controllers across extended industrial network topologies.

Hardware Specifications

Dedicated Hardware Features

The IC660ELB905R module features an onboard Genius Controller ASIC paired with four optocouplers and an isolated DC/DC converter to maintain 1500 Vrms isolation between the Genius LAN network and the Series 90-70 VME backplane. Supporting high-speed backplane bus communication velocity parameters, the board manages global data transfers with typical scan cycles of 5 ms for 256 I/O points. Integrated hardware watchdog timers and dual line drivers enforce fault detection and protocol stability while maintaining firmware flash compatibility across Series 90-70 PLC CPU families.

Frequently Asked Questions

Q: What cable specifications are required to maintain the 750-meter maximum segment distance on the IC660ELB905R Genius port?

A: The Genius LAN protocol requires approved shielded twisted-pair cabling (such as Belden 9880 or equivalent twinaxial cable) terminated with proper 75-ohm or 100-ohm end-of-line resistors matching the cable characteristic impedance to eliminate signal reflection.

Q: Does the IC660ELB905R support dual Genius bus redundancy?

A: Yes, the module supports redundant bus topologies using dual cables and switching circuitry to maintain continuous communication coverage if a single cable segment experiences an open or short circuit fault.

Field Installation Guidelines

1. VME Slot Alignment: Insert the IC660ELB905R card into its designated slot on the Series 90-70 VME rack with power disconnected, ensuring both 48-pin rear connectors engage fully with the backplane plane.
2. Torque Retaining Screws: Secure the top and bottom panel mounting thumbscrews to the rack frame to ensure structural ground contact and prevent connector vibration detachment.
3. Shield Termination: Connect the shield wire of the Genius LAN twinaxial cable directly to the shield pin on the 15-pin D-sub connector or the rack frame earth lug to minimize high-frequency noise interference.
4. Segment Termination: Ensure that physical end-of-line termination resistors are installed across the serial data pair at the two physical ends of the Genius LAN segment.