GE IC660BBA026

Technical Specifications

• Number of input channels: 6 individually isolated channels
• Input signal range: 4 mA to 20 mA (0 mA to 25 mA overrange capability)
• Input resolution: 1 µA (at 200 ms conversion time)
• Measurement accuracy: 0.1% of full scale
• Conversion time: Programmable from 16 ms to 400 ms
• Supply voltage range: 18 V DC to 56 V DC
• Power consumption: 12 W
• Isolation voltage: 1500 V block-to-block and group-to-group
• Communication protocol: Genius Protocol
• Operating temperature range: 0°C to +60°C
• Storage temperature range: -40°C to +85°C
• Weight: 1.8 kg

Functional Features

• Each channel provides 24 V loop power supply for field transmitters
• Independent channel isolation eliminates ground loop interference
• Software configurable input scaling and engineering unit conversion
• Upper and lower alarm limits programmable per channel
• Advanced diagnostics including open wire detection, overrange/underrange detection and internal fault reporting
• Dedicated digital output for Bus Switching Module control

Application Scenarios

• Industrial process control system analog signal acquisition
• Pressure, flow, level and temperature transmitter signal integration
• Factory automation production line process variable monitoring
• Distributed control system (DCS) and PLC system field I/O expansion
• 4–20 mA loop powered field device interface

Working Principle

The module provides 24 V DC excitation power to each current loop, and the field transmitter modulates the loop current according to the measured process variable. The internal precision sampling resistor converts the current signal into a voltage signal, which is then amplified and digitized by the A/D converter. The microprocessor processes the digital data, applies scaling and linearization, and transmits the final engineering value to the host controller via the Genius bus. The module continuously monitors each channel for fault conditions and reports status information to the control system.

Installation Requirements

• Supports right-side up or upside down mounting orientations
• Use shielded twisted pair cables for analog signal wiring
• Ensure proper cable shielding termination to minimize noise pickup
• Maintain adequate spacing from high-voltage power cables
• Connect the module to the Genius bus with correct network termination

Material & Structure

• Rugged industrial plastic enclosure with NEMA 1 rating
• Internal integrated analog signal conditioning, A/D conversion and communication circuits
• Screw terminal connectors for secure field wiring
• Front panel with status indicators for power, communication and fault conditions

Usage Notes

• Do not exceed the maximum input current rating
• Verify loop power supply compatibility with field transmitters
• Set appropriate conversion time to balance noise rejection and response speed
• Ensure reliable system grounding to maintain measurement accuracy
• Disconnect power before wiring or module replacement