Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | IC660BBD101 |
| Manufacturer | GE Fanuc |
| Product Family | Genius I/O |
| Product Type | 115VAC Low-Leakage I/O Block |
| Number of Circuits | 8 |
| Circuit Configuration | Input, tristate input, or output |
| Nominal Voltage | 115VAC |
| Operating Voltage | 93–132VAC |
| Frequency | 47–63Hz |
| Input Filter | Selectable 10–100ms |
| Output Response | Zero-crossing |
| Output Current | Up to 2A per circuit |
| Block-to-Block Isolation | 1500V |
| Standby Power | 8.5W |
| Heat Dissipation | 16.8W max with 8 inputs; 43.5W max with 8 outputs at 2A |
| Power Dropout | 1 cycle |
| Dimensions | 8.83 × 3.34 × 3.91 in |
| Weight | Approx. 4 lb / 1.8kg |
The IC660BBD101 is an intelligent Genius I/O block rather than a conventional PLC rack module. Its eight circuits share a 115VAC supply architecture, and each circuit can be configured for discrete input, tristate input, or output operation.
The control power is taken from the field voltage wired to the block, so a separate low-voltage block power supply is not required. The block also provides electronic circuit protection, output pulse testing, selectable input filtering, output feedback, and configurable power-up behavior.
Product Introduction
The GE Fanuc IC660BBD101 is an 8-circuit, 115VAC low-leakage Genius I/O block used to connect discrete sensors and actuators to a Genius communications network. The eight circuits are individually configurable, allowing the same block architecture to handle different combinations of AC discrete inputs and outputs. Its low-leakage design is particularly relevant when interfacing field devices that are sensitive to residual current.
For maintenance teams, the important point is that this is a distributed Genius I/O device, not a Series 90-30 plug-in I/O card. The terminal assembly, Genius bus wiring, field-voltage arrangement, and block configuration all matter during replacement. The documented catalog structure also shows that the electronics assembly and terminal assembly could be ordered separately.
IC660BBD101
Application Scenarios & Field Pitfalls
Engineering Pain Point
The IC660BBD101 is often encountered in older distributed control installations where the I/O block is physically located near the field devices rather than inside a conventional PLC rack. A replacement therefore requires more than matching the eight-point count. The Genius bus connection, 115VAC phase, circuit configuration, and stored block parameters must all be checked.
Typical Applications
- Legacy GE Fanuc distributed I/O systems — remote 115VAC discrete signal acquisition and control.
- Industrial machine control — AC proximity switches, limit switches, contactors, and indicating devices.
- Process auxiliary systems — distributed valve, motor, and equipment status/control circuits.
- Series Six / Genius-based installations — systems using Genius bus controllers or PCIM interfaces. The documented compatibility information includes Series Six Genius bus controllers and the IC660ELB906 PCIM.
Technical Pitfalls to Avoid
- Do not classify it as an ordinary 8-point AC input module. Every circuit can be configured as an input, tristate input, or output.
- Check the field-voltage arrangement carefully. The block’s control power is derived from the input/output device voltage, and the installation documentation specifies making block power connections to the same 120VAC phase.
- Do not substitute another Genius block solely because it has eight circuits. IC660BBD100, IC660BBD101, IC660BBS101 and other blocks have different electrical characteristics and functions.
- Record the Genius configuration before removal. Reference addresses, circuit I/O type, and baud-rate information are important when commissioning replacement hardware. The Genius documentation specifically recommends recording these parameters on the block label.
Related Products
- IC660BBD100 — Related 115VAC 8-circuit Genius block; electrical characteristics differ from the low-leakage BBD101.
- IC660TSD100 — Terminal assembly associated with the BBD101/BBD100/CBD100 electronics family.
- IC660EBD101 — Electronics assembly associated with the BBD101 terminal assembly.
- IC660BBD110 — 115VAC 16-circuit input block; input-only architecture rather than the configurable eight-circuit BBD101.
- IC660BBS101 — 115VAC/125VDC isolated I/O block with different electrical isolation and field-interface characteristics.
- IC660BBR100 — 16-circuit normally-closed relay output block.
- IC660BBR101 — 16-circuit normally-open relay output block.
- IC660ELB906 — Genius PCIM interface used with compatible computer-based control architectures.
- IC650CBB900-series — Series Six Genius bus controller family documented as compatible with the BBD101.
Procurement Check
For a replacement, specify the complete IC660BBD101 catalog number and verify the existing terminal assembly, Genius bus configuration, circuit-by-circuit I/O configuration, baud rate, and 115VAC wiring phase. If the installed unit has a separate electronics and terminal assembly, check both before ordering. A visually similar Genius block is not automatically a functional substitute.
