GE Fanuc IC660 Genius I/O Modules: IC660CBB902 IC660FP8900K IC660CBB902K

Technical Dossier

Product Details And Specifications

GE Fanuc IC660 Genius I/O Series Technical Notes

The GE Fanuc IC660 Genius I/O series is a distributed I/O platform deployed across global heavy industry sectors including petrochemical refineries, nuclear power generation facilities, offshore oil & gas platforms, and continuous-process chemical plants. Introduced in the 1980s as part of GE's Series Six and Series 90 automation ecosystem, the IC660 architecture established a field-proven standard for high-noise-immunity serial bus communication between PLCs and remote I/O blocks. Installations of this series remain operational in facilities across North America, Europe, and Asia-Pacific, where replacement of the entire control infrastructure is cost-prohibitive. The Genius Bus — operating at 153.6 kbps over a single twisted-pair cable — supports up to 32 devices per segment, enabling deterministic I/O scanning in environments where reliability is a non-negotiable operational requirement. The IC660 series is classified as a mature/end-of-life product line by GE Vernova (formerly GE Digital); however, demand for spare parts and replacement modules remains sustained due to the long operational lifecycles typical of DCS and PLC installations in regulated industries.

The Evolution of IC660 Architecture

The IC660 Genius I/O platform was developed alongside GE's Series Six PLC in the early 1980s, representing one of the first commercially deployed distributed I/O bus architectures in industrial automation. The original design used a proprietary Genius Bus protocol — a token-passing, single-master serial network — that predated fieldbus standards such as PROFIBUS and DeviceNet by nearly a decade.

In the early 1990s, GE transitioned the IC660 ecosystem to support the Series 90-70 and Series 90-30 PLC families, introducing Bus Controller modules (IC660CBB902, IC660CBB903) that served as the interface between the PLC backplane and the Genius Bus segment. This generation introduced redundant bus capability and expanded the I/O block catalog to include analog, discrete, and specialty modules.

IC660 Full Catalog & Functionalities (SKU List)

The following SKUs represent the core IC660 Genius I/O module range, organized by functional category. All models listed are verified members of the IC660 product family.

Bus Controllers (CPU / Network Interface)

• IC660CBB902: Genius Bus Controller for Series 90-70; single-bus, 32-device capacity
• IC660CBB902K: IC660CBB902 kit variant; includes mounting hardware and documentation
• IC660CBB903: Dual-bus Genius Bus Controller; supports redundant Genius Bus segments
• IC660FP8900K: Hand-held Monitor/Programmer kit for Genius Bus configuration and diagnostics
• IC660HHM501: Hand-held Monitor for Genius Bus; field diagnostic and configuration tool

Power Supply Modules (PS)

• IC660BBA020: 24 VDC power supply block for Genius I/O; 20W output rating
• IC660BBA100: 120 VAC input power supply block; standard field-side power for I/O blocks
• IC660BBA104: 120/240 VAC dual-voltage power supply block; wide-input field power module

Discrete I/O Blocks (DI / DO)

• IC660EBA100: 115 VAC discrete I/O block; 16-point mixed input/output configuration
• IC660EBD100: 24 VDC discrete I/O block; 16-point mixed input/output, standard density
• IC660EBD110: 24 VDC discrete I/O block; 32-point high-density mixed I/O configuration
• IC660TSD100: Discrete I/O terminal assembly; field-side wiring termination for EBD/EBA blocks

Analog I/O Blocks (AI / AO)

• IC660ELB912: Analog input block; 8-channel, 4–20 mA / 0–10 V configurable inputs
• IC660ELB921: Analog output block; 4-channel, 4–20 mA current output for process control loops
• IC660ELB922: Analog combination block; mixed analog input/output, 4-channel each

Auxiliary / Relay Modules

• IC660BRD100: Relay output block; 8-point, Form C contacts, 2A per point at 120 VAC

Quality Control for the IC660 Range

IC660 modules present specific quality control challenges due to their backplane bus interface, EEPROM-based configuration storage, and age-related component degradation. DriveKNMS applies a structured test protocol to all IC660 units prior to shipment.

Bus Controller modules (IC660CBB902, IC660CBB903) are tested under live Genius Bus conditions using a dedicated Series 90-70 test rack. Bus arbitration, device enumeration, and I/O scan cycle integrity are verified at rated bus speed (153.6 kbps). Analog I/O blocks (IC660ELB912, IC660ELB921, IC660ELB922) are calibrated against NIST-traceable reference standards, with channel-by-channel linearity and offset verification across the full input/output range. Discrete I/O blocks are tested for contact integrity, isolation resistance, and response time under rated load. All modules undergo visual inspection for capacitor condition, PCB corrosion, and connector pin integrity. Units that do not meet specification are quarantined and not offered for sale.