GE IC660BBA026 Analog Input Block

The GE IC660BBA026 functions as a smart analog input block for Genius I/O networks. This block accepts four differential analog signals from field sensors. You will find it in process control and monitoring systems. It delivers 12-bit resolution for accurate measurement results. Therefore, this unit suits chemical, power, and water treatment facilities.

This block measures 180 mm in height and 95 mm in width. Its depth reaches 57 mm for panel or DIN rail mounting. The unit weighs approximately 0.68 kilograms. It contains one 12-bit ADC converter with multiplexed inputs. Two transformer-coupled isolation barriers separate field from logic circuits. Additionally, you get six status LEDs on the front panel.

Key Technical Specifications

Parameter	Value
Manufacturer	GE Fanuc Automation
Model	IC660BBA026
Product Type	Analog Input Block
Number of Channels	4 differential
ADC Resolution	12 bits
Input Signal Ranges	4-20 mA, 0-10 VDC
Accuracy	±0.25% of full scale
Conversion Time	25 ms per channel
Height	180 mm
Width	95 mm
Depth	57 mm
Weight	0.68 kg
Isolation Barriers	2 (transformer-coupled)
Status LEDs	6 (power, active, channel)
Energy Storage	≈ 550 µF (capacitive)
Operating Temperature	0°C to +60°C

Internal Architecture and Energy Storage

The GE IC660BBA026 stores moderate energy in its power supply filter. Electrolytic capacitors hold approximately 550 microfarads of total capacitance. These capacitors maintain stable DC rails during input fluctuations. A microprocessor manages channel scanning and data formatting. This chip also handles Genius network communication protocols. Two optical isolators separate the ADC from the field wiring. You get a built-in 24 VDC regulator for loop power.

Connection Interfaces and Signal Wiring

You will find a removable 10-pin terminal block on this block. This terminal accepts four analog input pairs and shield connections. Use twisted shielded pair cable for all analog signals. Connect the shield drain wire to the ground terminal only. The GE IC660BBA026 also includes two Genius network connectors. One connector brings network traffic into the unit. The other connector passes it to the next device. Four LEDs indicate channel activity and fault conditions.

Configuration and Installation Steps

You mount this block onto standard 35 mm DIN rail. First, clip the top edge onto the rail firmly. Then, press the bottom downward until it clicks into place. Slide the block along the rail for proper spacing. Connect the 24 VDC power supply to the dedicated terminals. The GE IC660BBA026 consumes 150 mA from this supply. Use the handheld monitor or software to configure each channel. Set each input for either 4-20 mA or 0-10 V range. Always terminate the Genius network at both physical ends.