GE IC660BBD021 | Source/Sink I/O Block 16-Circuit

The GE IC660BBD021 provides flexible digital I/O for GE Fanuc Genius networks. This source/sink I/O block connects field devices to a Genius bus controller. You can configure each channel independently as input or output. The unit handles both sourcing and sinking field devices without jumpers.

I/O and Electrical Specifications

Parameter	Specification
Brand	GE Fanuc (General Electric)
Model	IC660BBD021
Product Type	Source/Sink I/O Block
Number of Circuits	16 (configurable)
Voltage Range	12 to 24 VDC nominal
Input Current	7 mA per circuit (sink mode)
Output Current	0.5 A per circuit (source mode)
Output Type	MOSFET (solid state)
Short Circuit Protection	Yes (1.5 A trip)
Response Time	1 ms typical
Isolation Voltage	500 VAC (field to logic)

The GE IC660BBD021 allows per-circuit configuration as input or output. This source/sink I/O block operates from 12 to 24 VDC power supplies. You can mix input and output functions on the same device. The unit provides 0.5 amp sourcing outputs for small loads.

Physical Dimensions and Weight

Parameter	Specification
Weight	0.85 kg (1.87 lbs)
Height	152 mm
Width	114 mm
Depth	79 mm
Enclosure Type	IP20 (open style)
Mounting	DIN rail or panel
Terminal Type	Screw clamp (28 positions)
Component Count	142 discrete parts

This source/sink I/O block weighs 0.85 kg for rugged industrial mounting. The unit measures 152 mm tall by 114 mm wide. Its depth reaches 79 mm including the terminal block. You can mount the GE IC660BBD021 on a 35 mm DIN rail or directly to a panel.

Interface and Network Connection

A Genius bus connector (5-pin female) links to the network cable. The front panel includes two rotary switches for bus address setting (0 to 31). You will find 28 screw terminals for field device wiring and power. Two LED indicators show bus status and module health. Sixteen yellow LEDs display individual circuit status for inputs or outputs.

Energy Storage and Internal Circuitry

The GE IC660BBD021 stores minimal energy for signal buffering. Small filter capacitors provide 220 µF of total storage at 24 VDC. The module does not contain any battery for configuration retention. Instead, it reads all address and mode settings from the rotary switches. Sixteen MOSFETs drive outputs with internal current limiting.

Component Layout and Construction

A Genius bus controller ASIC handles all network communication tasks. Sixteen optocouplers isolate field signals from the internal logic. You will find 68 resistors, 42 capacitors, and 8 integrated circuits on the board. The GE IC660BBD021 includes transient suppression for all I/O circuits. A metal shield covers the Genius transceiver section for noise immunity.

Operational Use and System Integration

Transitioning to this block expands your Genius distributed I/O capacity. You can place the block up to 2,500 meters from the bus controller. The unit works with all Genius bus controllers for Series 90-30 or 90-70 PLCs. Use the GE IC660BBD021 for machine control, material handling, or remote monitoring. For best results, terminate the Genius bus with 100-ohm resistors at both ends.