Description

Application Scenarios

At a municipal wastewater treatment plant in Ohio,the SCADA system began showing erratic level readings from multiple wet wells,leading to pump cycling and overflow risks.Investigation revealed that the legacy analog input module was suffering from ground loops and signal drift.The maintenance team replaced the failing unit with a new GE IC697ALG230,which immediately stabilized the signals.Its channel-to-channel isolation eliminated cross-talk,and the±0.1%accuracy ensured consistent level monitoring.Operators regained confidence in the automation system,reducing manual interventions by 70%and preventing potential environmental violations—proving that the IC697ALG230 is more than a component;it’s a cornerstone of system integrity.

Parameter

Main Parameters Value/Description

Product Model IC697ALG230

Manufacturer General Electric(GE Automation&Controls),formerly GE Fanuc

Product Type Analog Input Module

PLC Series GE 90-70(9070)Programmable Logic Controller

Number of Channels 16 single-ended inputs

Input Signal Types

Current:4-20 mA,0-20 mA

Voltage:0-10 V,1-5 V,±10 V(field-configurable per channel)

|Resolution|15-bit(32,768 counts)

|Accuracy|±0.1%of full scale(typical)

|Isolation|Channel-to-channel and backplane isolation(2500V AC)

|Input Impedance|

Current:250Ω

Voltage:1 MΩ

|Sampling Rate|16 channels scanned in~8.5 ms(approx.0.53 ms per channel)

|Data Format|16-bit signed integer(hexadecimal or decimal)

|Calibration|Internal auto-zero and calibration circuitry;field calibration recommended annually

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

|Storage Temperature|-40°C to 85°C

|Humidity|5%to 95%non-condensing

|Power Consumption|+5V DC:180 mA(from backplane)

|Bus Interface|GE 90-70 PLC rack(VME-based backplane)

|LED Indicators|RUN,ERROR,and channel-specific status(via software)

|Certifications|CE,UL,CSA,FM(Class I,Div 2)

Technical Principles and Innovative Values

Innovation Point 1:Field-Configurable Input Ranges

Each of the 16 channels on the IC697ALG230 can be independently configured via Switch Settings and Software for current or voltage input,allowing mixed signal types in a single module—maximizing flexibility and reducing spare part inventory.

Innovation Point 2:High-Resolution 15-bit Conversion

With 15-bit resolution,the module provides exceptional detail in process variables,enabling fine control and early detection of process deviations—critical in applications like chemical dosing or turbine temperature monitoring.

Innovation Point 3:Channel-to-Channel Isolation

Unlike non-isolated modules,the IC697ALG230 features optical and transformer isolation between channels,preventing ground loops,noise coupling,and fault propagation.This is essential in large plants with long cable runs and multiple grounding points.

Innovation Point 4:Integrated Auto-Zero and Calibration Circuitry

The module includes internal reference circuits that automatically compensate for offset and drift,maintaining long-term accuracy without frequent manual recalibration.

Innovation Point 5:Seamless Integration with GE 90-70 Ecosystem

Designed specifically for the GE 90-70 PLC rack,the IC697ALG230 plugs directly into the backplane,sharing power and communication seamlessly with CPUs,digital I/O,and communication modules via the VME bus.

Application Cases and Industry Value

In a coal-fired power plant in Pennsylvania,the GE IC697ALG230 was used to monitor boiler tube wall temperatures via thermocouple transmitters(4-20mA output).Over time,EMI from high-power drives caused signal noise on older modules.After upgrading to the IC697ALG230,the plant achieved stable,noise-free temperature readings,enabling more precise combustion control and reducing tube leaks by 30%.Engineers credited the module’s isolation and shielding for the improvement.

At an automotive assembly plant in Michigan,the IC697ALG230 acquired pressure feedback from robotic weld guns.The high accuracy and fast scan rate ensured consistent weld quality.When one channel failed due to a wiring fault,the isolation prevented damage to adjacent channels,minimizing downtime.The plant saved over$150,000 annually in maintenance and scrap reduction.

Installation,Maintenance,and Full-Cycle Support

Installing the GE IC697ALG230 involves:

Powering down the PLC rack(recommended).

Inserting the module into an available I/O slot on the GE 90-70 chassis.

Securing it with mounting screws.

Wiring field devices to the terminal base(e.g.,IC697ACC704)using shielded twisted-pair cable,with shields grounded at one end.

Configuring input types and scaling in VersaPro software.

Routine maintenance includes:

Annual visual inspection for overheating or corrosion.

Verification of signal accuracy using a calibrated source.

Cleaning of rack contacts if necessary.

Firmware and configuration backups.

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