GE IC694ALG223 Analog Current Input Module for PACSystem RX3i

Technical Specifications Breakdown

Key parameters from the datasheet define the IC694ALG223's performance:

• Input Channels: 16 single-ended inputs, configurable individually.
• Input Current Ranges: 0 to 20 milliamps and 4 to 20 milliamps (normal and enhanced).
• Digital Resolution: 12 bits, providing 4 µA/bit for 4-20 mA and 5 µA/bit for 0-20 mA and enhanced ranges.
• Channel Update Rate: 13 ms per channel, ensuring timely data capture.
• Accuracy: ±0.25% of full scale at 25°C (77°F); ±0.5% over the 0 to 60°C operating range.
• Input Impedance: 250 ohms.
• Input Low Pass Filter Response: 19 Hz.
• Power Requirements: 120 mA at 5 VDC from the backplane; 65 mA at 24 VDC from an external supply (20 to 30 VDC range).
• External Supply Range: 20 to 30 Volts DC.

These specs make the module suitable for precise current measurement in industrial environments.

Industry Applications

In process control, the IC694ALG223 interfaces with 4-20 mA transmitters for pressure, flow, or temperature monitoring. Its enhanced 4-20 mA range supports open-wire fault detection, critical for remote installations. For example, in a water treatment plant, the module reads signals from multiple flow meters, converting them to digital data for the RX3i controller. The 13 ms update rate ensures real-time response to process changes.

Installation & Setup Guidance

Install the IC694ALG223 in any single slot of a PACSystem RX3i chassis. Use configuration software to set each channel to 0-20 mA, 4-20 mA normal, or 4-20 mA enhanced. Wire the external 24 VDC supply (20-30 VDC range) to power the current loops. For 4-20 mA enhanced mode, enable open-wire detection alarms. Ensure the module's current draw of 120 mA at 5 VDC is within the backplane capacity.

Maintenance & Reliability

Routine inspection of connections and the external power supply ensures reliable operation. The module operates from 0 to 60°C, so verify ambient conditions stay within this range. Factory calibration (4 µA/count for 4-20 mA, 5 µA/count for other ranges) eliminates the need for field adjustment. Periodic verification of alarm settings via software maintains fault detection integrity.

What Is the IC694ALG223?

Struggling to integrate multiple analog current signals into your automation system reliably? The IC694ALG223 is a high-density analog current input module from GE Fanuc, part of the PACSystem RX3i series, now supported by Emerson Automation. This module provides sixteen single-ended input channels that accept 0-20 mA, 4-20 mA (normal), and 4-20 mA (enhanced) signals. With 12-bit digital resolution and a 13 ms channel update rate, it converts analog data from transmitters, transducers, and isolators into digital values for your controller.

Compatibility & Integration

The IC694ALG223 works as local or distributed I/O with PACSystems RX3i and RX7i controllers. It also fits Series 90-30 PLC systems with a serial connector. The module reports power supply status and module status to the CPU, enabling system-level diagnostics.

Selection Guide & Purchasing Advice

Before ordering, verify your system's backplane current capacity and external supply voltage (20-30 VDC). The IC694ALG223 is active in the product lifecycle. Contact AutoDCSTech for current availability and pricing. We stock this module and can advise on compatible accessories.

Frequently Asked Questions

1. What input ranges does the IC694ALG223 support?

It supports 0-20 mA, 4-20 mA (normal), and 4-20 mA (enhanced) ranges, configurable per channel.

1. How does open-wire fault detection work?

In 4-20 mA enhanced mode, the module detects currents from 4 down to 0 mA, triggering an alarm for broken wires.

1. What is the update rate for each channel?

The channel update rate is 13 ms, as specified in the datasheet.

1. Can I use this module with Series 90-30 PLCs?

Yes, it can be installed in I/O slots of Series 90-30 PLC systems that have a serial connector.

1. What is the accuracy over temperature?

Accuracy is ±0.25% of full scale at 25°C and ±0.5% over the 0 to 60°C operating range.