PRODUCT INFORMATION
Product Overview
The General Electric IC694ALG223 is an Analog current input module designed for PACSystems RX3i control systems. This high-density module provides sixteen single-ended analog input channels for industrial process acquisition. It converts incoming analog current signals into 12-bit digital values. Supported signal ranges include 0 to 20 mA, standard 4 to 20 mA, and enhanced 4 to 20 mA. The module occupies a single slot in any compatible RX3i backplane rack.
The module interfaces directly with field transmitters, transducers, and signal isolators. It draws 120 mA from the backplane 5 VDC bus. An external 24 VDC supply provides 65 mA for field loop currents. The hardware reports external power supply operational status directly to the CPU. When configured for enhanced 4 to 20 mA mode, the unit provides open-wire fault detection.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Weight | 1.31 lbs (0.60 kg) |
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| Product Description | Analog input module |
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| No of Channels | Sixteen (16) single-ended inputs; |
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| Input Channels | 16 |
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| Nominal Input signal | 0-20 mA; 4-20 mA (normal); 4-20 mA (enhanced) |
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| Input Current Ranges | 0 to 20 milliamps, 4 to 20 milliamps |
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| Channel update rate | 13 ms |
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| Power Requirements | 120 milliamps at 5 Volts DC |
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| Digital Resolution | 12 bit |
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| Input Impedance | 250 ohms |
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| Analog resolution | 4–20 mA: 4 µA (4 µA/bit) 0–20 mA: 5 µA (5 µA/bit) 4–20 mA Enhanced: 5 µA (5 µA/bit) |
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| External Supply Range | 20 to 30 Volts DC |
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| Accuracy | +/-0.25% of full scale @ 25degrees C (77degrees F); +/- 0.5% of full scale over specified operating temperature range |
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| Input Low Pass Filter Response | 19 Hz |
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| Current draw | 120 mA @ 5 VDC; 65 mA @ 24 VDC (user supplied) |
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| Operating Temperature | 0 to 60 degrees Celsius |
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| Calibration | 4 µA per count on 4 to 20 mA range; 5 µA per count on 0 to 20 mA and 4 to 20 mA Enhanced |
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| Product Lifecycle Status | Active |
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TECHNICAL INFORMATION
Features
- Sixteen single-ended analog current input channels in a single-slot module form factor.
- Software-configurable ranges for 0 to 20 mA, 4 to 20 mA normal, and 4 to 20 mA enhanced.
- Internal 12-bit analog-to-digital converter assigned per input channel.
- Factory calibrated resolution of 4 µA per count for standard 4 to 20 mA operation.
- Factory calibrated resolution of 5 µA per count for 0 to 20 mA and enhanced ranges.
- Open-wire fault detection when operating in the 4 to 20 mA enhanced input range.
- User-configurable high and low process alarm thresholds set through programming software.
- External power supply status monitoring mapped directly to controller reference memory.
TECHNICAL INFORMATION
Applications
- Current loop interface for process transmitters measuring pressure, flow, and temperature.
- Signal acquisition from industrial transducers and instrumentation isolators.
- Centralized and distributed analog data monitoring in PACSystems RX3i automated architectures.
- Process monitoring requiring broken-wire diagnostics on 4 to 20 mA control loops.
TECHNICAL INFORMATION
Connections / Interfaces
- Sixteen single-ended analog input terminals share a common connection.
- Backplane connection draws 120 mA at 5 VDC through the RX3i chassis connector.
- External power terminal connection accepts 20 to 30 VDC for input loop power.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into a single vacant slot of an RX3i chassis or compatible baseplate.
- Ensure external 24 VDC power is disconnected before wiring input terminal points.
- Use shielded twisted-pair cabling for all low-level analog input current loops.
- Maintain module operating environment within the rated 0 to 60 degrees Celsius range.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure individual channel ranges as 0-20 mA, 4-20 mA, or 4-20 mA enhanced via software.
- Set high and low alarm limits for each active analog channel using control software.
- Assign CPU reference memory addresses to read module status and power supply diagnostics.
- Select the enhanced 4-20 mA range to enable automatic open-wire detection.
TECHNICAL INFORMATION
Compatibility
- Installs directly into PACSystems RX3i chassis backplane slots.
- Operates in local and distributed I/O racks with RX3i and RX7i controllers.
- Installs into Series 90-30 PLC systems equipped with a serial connector backplane.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Product lifecycle status is currently verified as Active.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSInstalls directly into PACSystems RX3i chassis backplane slots. Operates in local and distributed I/O racks with RX3i and RX7i controllers. Installs into Series 90-30 PLC systems equipped with a serial connector backplane.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What input current ranges are supported by the IC694ALG223?
The module supports 0 to 20 mA, 4 to 20 mA normal, and 4 to 20 mA enhanced ranges.
How does the IC694ALG223 detect open-wire conditions on field loops?
Open-wire detection operates in 4 to 20 mA enhanced mode. It flags input currents falling below 4 mA.
What are the power requirements for operating the IC694ALG223?
It requires 120 mA at 5 VDC from the backplane. It also requires 65 mA from an external 24 VDC supply.
What is the conversion resolution of each channel on the IC694ALG223?
Each channel uses an embedded analog-to-digital converter that provides 12 bits of conversion resolution.
