IC693ALG221E GE Fanuc

IC693ALG221E GE Fanuc Input module

Brand：General Electric Model number：IC693ALG221E

Country of origin: U.S. Product weight：0.55kg

HS code：8517623990

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Product Details：

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The GE Fanuc IC693ALG221E is a high-performance Analog Input Module designed for use with the Series 90-30 Programmable Logic Controller (PLC) system. It is a current-only analog input module that provides four input channels, each capable of converting an analog current signal into a digital value for use by the PLC processor. The "E" suffix typically denotes a specific hardware revision or updated version of the original module, maintaining full backward compatibility with the Series 90-30 rack.

Technical Specifications

Module Type: Current Analog Input
Number of Channels: 4 Differential Inputs
Input Range: 4 to 20 mA and 0 to 20 mA (Software configurable)
Resolution: 12-bit binary (4 to 20 mA range equals 0 to 4000 counts; 0 to 20 mA range equals 0 to 4000 counts)
Conversion Speed: 1 millisecond per channel (4 milliseconds total for all four channels)
Input Impedance: 250 ohms
Accuracy: +/- 0.1% of full scale at 25 degrees Celsius; +/- 0.25% of full scale over the full operating temperature range
Power Consumption: 100 mA from the +5V bus on the PLC backplane
External Power Requirement: None (The module is loop-powered or powered by the field device, but requires 24VDC for the loop if the device is passive)
Isolation: 1500 volts between field side and logic side

Product Advantages

High Precision: The 12-bit resolution ensures that small changes in industrial current loops are captured accurately, which is vital for process control applications.
Fast Response Time: With a conversion rate of 1ms per channel, the module provides rapid data updates to the CPU, allowing for responsive control loops.
Easy Configuration: The module is configured using GE Fanuc software (such as Proficy Machine Edition), eliminating the need for hardware jumpers or DIP switches to set the input range.
System Reliability: Built-in diagnostics and a robust 1500V isolation barrier protect the sensitive PLC backplane from electrical noise and surges originating in the field.
Compact Footprint: It occupies a single slot on any Series 90-30 baseplate, maximizing the use of space in control cabinets.

Important Considerations and Precautions

Wiring Integrity: Ensure that the input current does not exceed the maximum rated limits (typically 30mA) to avoid damaging the internal 250-ohm precision resistors.
Loop Power: While the module itself does not require external power for its internal logic, the 4-20mA current loops often require an external 24VDC power supply depending on whether the field transmitters are 2-wire or 4-wire devices.
Shielding: To maintain accuracy and minimize electrical interference, it is highly recommended to use shielded twisted-pair cable for all analog signals and to ground the shields at the PLC end only.
Module Placement: Avoid installing the analog module directly next to high-voltage or high-noise components, such as motor starters or large AC contactors, to prevent signal distortion.
Discontinuation Notice: As the Series 90-30 is a mature platform, users should be aware that these parts may be categorized as "Legacy" or "Discontinued" by Emerson (who acquired GE Intelligent Platforms). Checking for refurbished units or planning a migration to the PACSystems RX3i platform is advised for long-term projects.

Product Applications

The IC693ALG221E is widely used in industrial environments where monitoring continuous variables is necessary.

Process Industry: Monitoring pressure, flow, and level transmitters in chemical plants or water treatment facilities.
Temperature Monitoring: Interfacing with temperature transmitters that output a 4-20mA signal to track oven or cooling system performance.
HVAC Systems: Controlling air dampers and valves based on feedback from humidity and CO2 sensors.
Material Handling: Measuring the weight on conveyor scales or the tension in web-handling machinery.
Environmental Control: Collecting data from specialized sensors for air quality or pH levels in liquid waste management.

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