GE IC660BBA026

Technical Specifications​

Input channels: 6 analog inputs.

Input signal: 4 to 20 mA standard; overrange to 25 mA according to configuration.

Resolution: 1 µA.

Accuracy: 0.1% of full scale at rated conditions.

Conversion time: 16.6 ms to 400 ms per channel, user-selectable.

Block power: 18 to 56 VDC.

Loop impedance support: up to 1000 ohms for 0 to 20 mA range, up to 800 ohms for 20 to 25 mA overrange.

Isolation: 1500 VAC RMS block-to-block and group-to-group.

Diagnostics: underrange, overrange, high alarm, low alarm, open-wire.

Heat dissipation: approximately 12 W maximum in high-performance configuration.

Dimensions: 8.83 in x 3.34 in x 3.91 in.

Weight: approximately 4 lb, 1.8 kg.

Functional Features​

Microamp-level current conversion for precision loops.

Selectable conversion time for speed versus stability.

Full channel isolation for noisy analog environments.

Genius protocol reporting with Unit OK and I/O Enabled status.

Alarm and open-circuit detection per input.

Application Scenarios​

Flow and pressure transmitter acquisition.

Tank level and weight-system analog input.

Combustion and boiler control loops.

Process skids and distributed Genius I/O stations.

Performance Parameters​

1 µA resolution across 4 to 20 mA provides fine signal granularity.

0.1% full-scale accuracy supports closed-loop control.

Open-wire detection identifies broken transmitter or loop discontinuity.

Materials And Construction​

Molded industrial Genius enclosure.

Analog input front end with precision shunt, ADC, and isolation barriers.

Screw terminal block for loop and power wiring.

LED indicators for block health and I/O enable.

Working Principle​

Each input converts the 4 to 20 mA loop current into a proportional voltage through a precision resistor. An ADC digitizes the value, the module applies calibration and filtering, and the Genius interface transmits normalized engineering data. Diagnostic routines compare measured current with configured underrange, overrange, and alarm limits.

Installation Requirements​

Mount in a Genius-compatible enclosure with proper bus termination.

Wire each transmitter as active current source within supported loop impedance.

Supply 18 to 56 VDC block power.

Set conversion time, range, and alarms in the bus configuration.

Separate analog shields from high-voltage conductors.

Usage Precautions​

Confirm transmitter loop resistance does not exceed the module impedance limit.

Do not apply voltage sources directly to current inputs.

Configure underrange/overrange alarms before process startup.

Replace with identical IC660BBA026 firmware/configuration to preserve scaling.

Inspect terminals regularly to prevent loose current-loop wiring.