Product Overview

The GE IC694ALG223 is a high-density analog expansion module designed for the PACSystems RX3i and Series 90-30 controller families. This module provides 16 single-ended channels specifically engineered for current-loop signal acquisition. It serves as a precision interface for field transmitters, pressure transducers, and flow meters, converting analog current signals into 12-bit digital data for the PLC processor.

Occupying only a single slot in the universal backplane, the IC694ALG223 maximizes I/O density while maintaining high signal integrity. The module supports multiple software-configurable ranges, including 0 to 20 mA and 4 to 20 mA, with an "Enhanced" mode available for 4 to 20 mA signals to facilitate advanced fault detection and diagnostic reporting.

Technical Specifications

• Manufacturer: GE Fanuc / Emerson (PACSystems)

• Model Number: IC694ALG223

• Input Channels: 16 Single-Ended

• Resolution: 12-Bit (4 to 5 μA per count depending on range)

• Input Signal Ranges: 0-20 mA, 4-20 mA, 4-20 mA Enhanced

• Update Rate: 13 ms (all 16 channels)

• Backplane Current Draw: 120 mA @ 5V DC

• External Power Requirement: 65 mA @ 24V DC (for current loops)

• Common Mode Rejection: >70 dB at DC; >70 dB at 60 Hz

• Operating Temperature: 0°C to 60°C (32°F to 140°F)

• Dimensions: 3.5 x 13 x 13.5 cm

• Weight: 0.36 kg

Key Technical Characteristics

• Advanced Loop Diagnostics: When operated in the 4-20 mA Enhanced range, the module provides automated open-wire detection. This feature triggers a diagnostic alarm if the current falls below threshold levels, allowing for immediate identification of field wiring failures.

• Superior Noise Immunity: Built to operate in electrically congested industrial plants, the module features robust common-mode rejection and digital filtering, ensuring that electromagnetic interference does not compromise data accuracy.

• Precision Conversion: Each channel utilizes high-speed analog-to-digital conversion with factory calibration, providing a consistent resolution of 4 μA for the 4-20 mA range and 5 μA for the 0-20 mA range.

• Intelligent Power Monitoring: The IC694ALG223 continuously tracks the status of the user-supplied 24V DC power. Should the external power source fail, the module immediately notifies the CPU to prevent invalid data from affecting process logic.

• Configurable Alarms: The module supports software-defined high and low alarm limits for each channel, enabling proactive monitoring of process variables directly at the I/O level.

Application Utility

The IC694ALG223 is a standard choice for high-density analog monitoring in various sectors, including:

• Process Industries: Chemical, water treatment, and oil and gas.

• Manufacturing: Monitoring sensor feedback in automated assembly lines.

• Infrastructure: Environmental monitoring and HVAC control systems.

• SCADA Systems: Acting as a reliable data acquisition node for remote telemetry.