Product Introduction
In process control applications requiring precise current measurement, the GE IC694ALG223 analog current input module delivers exceptional performance. As part of the PACSystems RX3i series, this high-density module features sixteen single-ended input channels individually configurable for 0–20 mA, 4–20 mA (normal), or 4–20 mA (enhanced) signals. The GE IC694ALG223 provides 12‑bit resolution and a 13 ms update rate per channel, making it ideal for interfacing transmitters, transducers, and isolators in demanding industrial environments.
Technical Specifications Breakdown
The following table lists the key parameters of the GE IC694ALG223 module, sourced directly from the product documentation.
| Parameter |
Value |
| Number of Channels |
16 single-ended |
| Input Ranges |
0–20 mA, 4–20 mA (normal), 4–20 mA (enhanced) |
| Digital Resolution |
12 bits |
| Channel Update Rate |
13 ms |
| Input Impedance |
250 Ω |
| Accuracy (@25°C) |
±0.25% of full scale |
| Power Draw (5 VDC bus) |
120 mA |
| External Supply Range |
20–30 VDC |
| Input Low-Pass Filter |
19 Hz |
| Factory Calibration |
4 µA/bit (4–20 mA), 5 µA/bit (0–20 mA & enhanced) |
The module also reports open-wire faults when configured for the 4–20 mA enhanced range, reducing diagnostic time. Its 19 Hz input filter ensures stable readings in electrically noisy environments.
Industry Applications
The GE IC694ALG223 excels in applications where high channel density and reliable current sensing are critical. Typical use cases include:
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Oil & Gas: Monitoring pressure transmitters and flow meters in remote wellheads, where the 4–20 mA enhanced range provides open-wire detection.
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Water Treatment: Interfacing with pH sensors and level transducers in distributed I/O configurations within RX3i and RX7i systems.
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Manufacturing: Aggregating analog signals from multiple sensors to a single CPU, reducing cabling and cabinet space by up to 16 channels per slot.
Installation & Setup Guidance
Install the GE IC694ALG223 in any single slot of a PACSystems RX3i chassis. Before powering on, verify that the external 24 VDC supply is within 20–30 VDC and that the module’s current draw (120 mA from the 5 VDC bus plus 65 mA for field loops) does not exceed the power supply capacity. Configure input ranges and alarm thresholds using the PAC Machine Edition software. For 4–20 mA enhanced mode, enable the open-wire detection feature to automatically flag broken loops. No field wiring terminal blocks are included; use compatible RX3i I/O terminal bases.
Maintenance & Reliability
The GE IC694ALG223 is an active product with a design life typical of industrial automation modules. To ensure long-term reliability, inspect the module annually for dust accumulation on the heat sink and verify that the ambient temperature stays between 0 °C and 60 °C. Because the module provides power supply status feedback, operators can integrate diagnostic alarms into the CPU logic to pre‑empt failures. The factory calibration (4 µA/bit or 5 µA/bit) should not require adjustment unless the module is replaced. The low‑pass filter at 19 Hz helps reduce noise‑induced errors, extending the effective sensor life.
Selection Guide & Purchasing Advice
When ordering the GE IC694ALG223, confirm that your chassis supports the RX3i series and that you have the correct terminal base for field wiring. This module replaces older high‑density analog input modules requiring multiple slots, offering a compact, cost‑effective upgrade. For volume pricing or technical assistance, contact UBEST Automation (store: ubest101) – your trusted source for industrial automation spares. Verify stock availability and lead times before placing an order.