GE IC660ELB905R Genius Network Module

This module interfaces Genius I/O blocks with GE series 90-70 PLC systems. It manages high-speed communication over a redundant Genius bus network. Therefore, it enables distributed I/O control in large industrial automation applications.

Technical Specifications of GE IC660ELB905R

The GE IC660ELB905R measures 20.0 cm in length and 15.0 cm in width. Its module weight equals approximately 0.65 kg for sturdy rack mounting. A single 15-pin D-sub connector provides the Genius network interface. Additionally, the module includes two LED status indicators for network diagnostics.

Parameter	Specification
Brand	General Electric (GE)
Full Model	IC660ELB905R
Category	Genius Network Interface Module
Dimensions (L x W x H)	20.0 cm x 15.0 cm x 4.5 cm (7.87″ x 5.91″ x 1.77″)
Module Weight	0.65 kg (1.43 lbs)
Primary Interface	1 x 15-pin D-Sub Female (Genius Bus)
Backplane Interface	Series 90-70 VME Backplane (Dual 48-pin Connectors)
Network Protocol	Genius LAN (GE Proprietary)
Transmission Rate	153.6 kbps (Nominal)
Bus Topology	Bus or Redundant Bus (Dual Cables)
Maximum Cable Length	750 meters (2460 feet) per Segment
Maximum Nodes per Segment	32 Genius Devices
Communication Type	Peer-to-Peer or Global Data Exchange
Scan Time	5 ms (Typical for 256 Points)
Fault Detection	Automatic Device Monitoring + Watchdog Timer
Redundancy Support	Yes (Dual Genius Bus Ports)
On-Board Components	1 Genius Controller ASIC + 2 Line Drivers + 1 Isolated DC/DC Converter + 4 Optocouplers
Energy Storage	2 x 220 µF Electrolytic Capacitors (35V) + 1 x 47 µF Tantalum (16V)
Operating Voltage	+5 VDC from VME Backplane (750 mA Typical)
Power Consumption	3.75 W (Typical)
Isolation Rating	1500 Vrms (Genius Port to Backplane)
Operating Temperature	0°C to +60°C (32°F to 140°F)
Mounting Type	Series 90-70 PLC Rack (Single Slot)

Energy Storage and Network Redundancy

The GE IC660ELB905R stores energy using three onboard capacitors. Two electrolytic capacitors smooth the network transceiver power supply. The tantalum capacitor filters high-frequency noise from the controller ASIC. Moreover, this module supports dual redundant Genius bus cables for fault tolerance. Consequently, the network continues operating even when one cable fails.

Installation and Diagnostic Indicators

You will find two LED indicators on the module’s front panel. A green LED shows normal network activity and bus status. A red LED illuminates during device faults or communication errors. The module also features a locking ejector for secure VME backplane insertion. Thus, it fits seamlessly into any standard Series 90-70 PLC rack slot.