GE IC660BBA025 Analog Output Block

The GE IC660BBA025 provides high-precision analog output for Genius I/O networks. This block converts digital commands into continuous analog signals. You will find it driving valves, actuators, and chart recorders. It delivers four independent output channels with 12-bit resolution. Therefore, this unit suits process control and positioning applications.

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

Key Technical Specifications

Parameter	Value
Manufacturer	GE Fanuc Automation
Model	IC660BBA025
Product Type	Analog Output Block
Number of Channels	4 (single-ended)
DAC Resolution	12 bits
Output Signal Ranges	4-20 mA, 0-10 VDC
Accuracy	±0.5% of full scale
Settling Time	5 ms per channel
Load Resistance (mA)	0 to 750 ohms
Load Resistance (V)	2000 ohms minimum
Height	180 mm
Width	95 mm
Depth	57 mm
Weight	0.68 kg
Isolation Barriers	3 (transformer-coupled)
Status LEDs	6 (power, active, channel)
Energy Storage	≈ 600 µF (capacitive)
Operating Temperature	0°C to +60°C

Internal Architecture and Energy Storage

The GE IC660BBA025 stores moderate energy in its output filter circuits. Electrolytic capacitors hold approximately 600 microfarads of total capacitance. These capacitors smooth the DAC outputs for stable analog signals. A dedicated microprocessor handles communication and channel updates. This chip receives Genius network commands and generates output values. Three isolation barriers protect the backplane from field transients. You get a built-in 24 VDC regulator for loop-powered outputs.

Connection Interfaces and Signal Wiring

You will find a removable 10-pin terminal block on this block. This terminal accepts four analog output pairs plus shield connections. Connect the signal wires to the positive and negative screw terminals. For 4-20 mA current loops, add an external loop power supply. For 0-10 V voltage outputs, use high-impedance inputs only. The GE IC660BBA025 includes two Genius network connectors on top. One connector brings network traffic into the block. The other connector passes it to the next Genius device.

Configuration and Installation Steps

You mount this block onto standard 35 mm DIN rail. First, hook the top lip onto the rail edge securely. Then, press the bottom downward until it locks in place. Slide the block along the rail for proper spacing. Connect 24 VDC power to the dedicated input terminals. The GE IC660BBA025 consumes 200 mA from this supply. Use a handheld monitor or software to configure each channel. Set each output for either 4-20 mA or 0-10 V operation. Always terminate both ends of the Genius network properly.