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Product Overview

The GE IC697ALG230 Analog Input Basic Converter Module is an industrial automation module designed for analog signal acquisition and conversion within compatible GE PLC control systems. It serves as an interface between analog field signals and the PLC’s internal control architecture, allowing process measurements to be incorporated into monitoring, control, alarm, and sequencing functions.

Analog input modules are commonly used where process variables are represented by continuously varying electrical signals rather than simple ON/OFF states. Typical measurements include temperature, pressure, flow, level, position, speed, and other process conditions.

The supplied specifications for the GE IC697ALG230 are 138 × 70 × 25 mm, with a listed weight of 0.8 kg.

For reliable operation, the module must be installed in the appropriate GE rack and used with the correct field wiring, signal type, configuration, grounding, and system architecture.

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Product Identification

Parameter	Specification
Manufacturer	GE
Model	IC697ALG230
Product Type	Analog Input Basic Converter Module
Product Category	Analog Input / Signal Conversion Module
Primary Function	Analog Signal Acquisition and Conversion
Application	Industrial Automation
Dimensions	138 × 70 × 25 mm
Weight	0.8 kg
Installation	Compatible GE PLC Rack
Signal Type	Analog Field Signals
Maintenance	Module, Wiring, Configuration, and Signal Inspection

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Technical Specifications

Technical Item	Specification
Brand	GE
Model Number	IC697ALG230
Product Type	Analog Input Basic Converter Module
Main Function	Analog Input Signal Conversion
Dimensions	138 × 70 × 25 mm
Weight	0.8 kg
Installation Type	PLC Rack Module
Application	Process and Machine Automation
System Role	Analog Field Interface
Signal Processing	Analog-to-Digital Conversion
Maintenance Requirement	Periodic Inspection
Primary Service Areas	Module, Field Wiring, Signal Quality, Configuration

The dimensions and weight above are based on the product information supplied for this model. Exact electrical channel specifications should be verified against the applicable system documentation before final wiring or commissioning.

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What Is the GE IC697ALG230?

The GE IC697ALG230 functions as an interface between analog field devices and a PLC control system.

A typical analog acquisition process can be represented as:

Field Sensor

↓

Analog Electrical Signal

↓

IC697ALG230

↓

Signal Conditioning / Conversion

↓

PLC Digital Data

↓

Control Program

↓

Output / Control Action

This allows the PLC program to process continuously varying measurements.

For example, a process transmitter may provide a signal that changes according to pressure. The analog input module receives that signal, converts it into usable controller data, and makes the resulting value available to the control application.

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Main Functions

Analog Signal Acquisition

The module receives analog signals generated by compatible field instruments.

Signal Conversion

The incoming analog signal is converted into a digital representation that the PLC can process.

Process Monitoring

Analog measurements can be used for real-time monitoring of industrial processes.

Closed-Loop Control

The acquired values can be used as feedback for PID loops and other control strategies where supported by the overall PLC system.

Alarm Processing

The PLC application can use analog values to determine whether process conditions exceed predefined limits.

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Role in an Industrial Control System

Analog input modules occupy an important position between instrumentation and controller logic.

A typical control loop may operate as follows:

Temperature Sensor

→ Analog Signal

→ IC697ALG230

→ PLC CPU

→ Control Algorithm

→ Output Module

→ Heater / Valve / Drive

This architecture allows the controller to respond continuously to changes in the process.

For example, if a temperature measurement increases beyond the desired operating range, the PLC can use the analog input value to reduce heating output or initiate an alarm.

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Typical Industrial Applications

Process Automation

The module can be used as part of systems that monitor continuously varying process variables.

Typical applications include:

• Pressure monitoring
• Temperature monitoring
• Flow measurement
• Level measurement
• Process control

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Manufacturing Automation

Analog measurements are frequently required in automated machinery.

Examples include:

• Position feedback
• Speed monitoring
• Force measurement
• Machine temperature
• Pressure monitoring

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Pump and Motor Systems

Analog instrumentation can provide:

• Pressure feedback
• Flow feedback
• Motor-related measurements
• Process condition monitoring

These values can then be incorporated into PLC control logic.

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Water and Wastewater

Potential measurements include:

• Tank level
• Pressure
• Flow
• Chemical-process parameters
• Pump operating conditions

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Analog Input Signal Path

A general signal path is:

Sensor

↓

Transmitter

↓

Field Wiring

↓

IC697ALG230

↓

Signal Conditioning

↓

A/D Conversion

↓

PLC Data

↓

Control Logic

The quality of every stage affects the final measurement.

A faulty sensor, damaged cable, poor grounding connection, or incorrect configuration can all produce an inaccurate analog value even if the input module itself is operating correctly.

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Installation Guide

1. Confirm the Application

Before installation, identify:

• Sensor type
• Signal type
• Required measurement range
• Wiring method
• Rack location
• PLC configuration
• Grounding arrangement

Do not connect a field instrument until its electrical characteristics have been verified.

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2. Verify the Module

Confirm the module marking:

GE IC697ALG230

Inspect the module for:

• Physical damage
• Cracks
• Bent connectors
• Contamination
• Signs of overheating

The supplied dimensions are:

138 × 70 × 25 mm

The supplied weight is:

0.8 kg

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3. Back Up the PLC Program

Before modifying the control system:

1. Back up the application program.
2. Record the current hardware configuration.
3. Document existing module positions.
4. Save important process parameters.
5. Record existing diagnostic conditions.

This provides a recovery point if configuration changes cause unexpected behavior.

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4. Shut Down the System

Before installing the module:

1. Stop the controlled process.
2. Shut down the PLC according to plant procedures.
3. Isolate applicable power sources.
4. Follow lockout/tagout requirements.
5. Verify that the rack is safe to service.

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5. Inspect the Rack

Inspect the intended rack position for:

• Damaged connectors
• Bent contacts
• Dust
• Foreign material
• Corrosion
• Mechanical damage

A clean backplane interface is essential for reliable module communication.

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6. Install the Module

Align the IC697ALG230 with the correct rack position.

Insert it evenly into the rack interface.

Do not force the module.

If unusual resistance occurs, remove the module and inspect the connector and rack position.

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7. Secure the Module

Ensure that:

• The module is fully seated.
• Retaining hardware is secure.
• Adjacent modules are not disturbed.
• The module does not move excessively.

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8. Prepare Field Wiring

Before connecting the analog input:

1. Identify each field instrument.
2. Confirm the signal type.
3. Verify polarity where applicable.
4. Identify signal common/reference connections.
5. Separate analog wiring from high-power conductors where practical.

Analog signals are more susceptible to electrical interference than simple digital signals.

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9. Check Shielding and Grounding

Where shielded instrumentation cable is used, follow the plant grounding design.

Avoid creating unintended ground loops.

Check:

• Shield termination
• Signal reference
• Cabinet grounding
• Instrument grounding
• Cable routing

Incorrect grounding can produce unstable or noisy measurements.

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10. Configure the Input

Configure the PLC system according to the required analog input parameters.

Typical configuration considerations include:

• Input channel assignment
• Signal type
• Measurement range
• Scaling
• Engineering units
• Alarm limits
• Filtering
• Data interpretation

The exact parameters depend on the application and the system’s hardware/software configuration.

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11. Restore Power

After installation and wiring verification:

1. Inspect all connections.
2. Confirm no wires are loose.
3. Restore power.
4. Start the PLC.
5. Observe module diagnostics.

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12. Perform Signal Verification

Apply a known input condition and compare the PLC value with the expected measurement.

For example:

Known Field Signal

↓

Measured Module Value

↓

PLC Engineering Value

↓

Expected Process Reading

The measured value should remain stable and correspond to the expected input.

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Commissioning Checklist

Item	Verification
IC697ALG230 Identified	Confirmed
Rack Compatibility Checked	Confirmed
Slot Position Verified	Confirmed
PLC Backup Completed	Confirmed
Power Isolated	Confirmed
Module Inspected	Confirmed
Backplane Inspected	Confirmed
Field Signal Identified	Confirmed
Wiring Verified	Confirmed
Grounding Checked	Confirmed
Input Configuration Verified	Confirmed
PLC Restarted	Confirmed
Analog Value Tested	Confirmed
Diagnostics Checked	Confirmed

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Troubleshooting Guide

Analog Input Reads Zero

If an analog channel continuously reads zero, check:

• Field transmitter power
• Signal wiring
• Signal polarity
• Common/reference connection
• Input configuration
• Sensor operation
• Module connection

A zero reading does not automatically indicate a failed analog input module.

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Analog Input Is Unstable

An unstable analog value may be caused by:

• Electrical noise
• Poor shielding
• Ground-loop problems
• Loose terminals
• Damaged cable
• Unstable sensor output
• Incorrect signal configuration

Compare the PLC reading with a measurement taken directly at the field instrument.

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Analog Reading Is Higher Than Expected

Possible causes include:

• Incorrect scaling
• Incorrect signal range
• Wiring error
• Sensor calibration problem
• Incorrect engineering-unit conversion
• External electrical interference

Verify the entire signal chain before replacing the module.

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Analog Reading Is Lower Than Expected

Check:

• Sensor output
• Cable resistance
• Termination
• Signal polarity
• Configuration
• Scaling
• Grounding

A low reading can originate from either the field device or the control-system interface.

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Analog Value Is Fixed at One Number

If the input remains at an apparently fixed value, investigate:

• Sensor output
• Wiring continuity
• Configuration
• Input channel
• Software scaling
• Module hardware

Compare the PLC value against a known external measurement.

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Module Is Not Recognized

Possible causes include:

• Poor rack connection
• Incorrect module position
• Power problem
• Configuration mismatch
• Module failure

Start with physical seating and system diagnostics.

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Input Channel Works Intermittently

Possible causes include:

• Loose terminal
• Damaged cable
• Vibration
• Electrical interference
• Poor connector contact
• Field transmitter instability

Monitor the signal while physically inspecting the wiring.

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Multiple Analog Channels Are Incorrect

When several channels develop similar problems simultaneously, investigate common causes first:

• Module power
• Rack/backplane connection
• Shared signal reference
• Grounding
• Shielding
• Configuration
• Environmental interference

If all channels change in a similar way, the problem may be upstream or common to the module rather than individual sensors.

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Analog Signal Contains Excessive Noise

Check:

1. Cable routing.
2. Shield termination.
3. Grounding.
4. Nearby motor drives.
5. Contactors.
6. High-current conductors.
7. Sensor power supply.
8. Loose connections.

Variable-frequency drives and switching equipment can be significant sources of electrical interference in industrial cabinets.

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PLC Shows an Analog Input Fault

Review:

• Module diagnostics
• Channel status
• Hardware configuration
• Field wiring
• Input signal
• Power supply
• Backplane connection

Record the fault condition before resetting the system because intermittent faults can disappear after a restart.

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Preventive Maintenance

Monthly Inspection

Check:

• Analog values
• Module status
• Field wiring
• Visible contamination
• Cabinet temperature

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Quarterly Inspection

Inspect:

• Module seating
• Terminal connections
• Cable shielding
• Grounding
• Backplane condition
• Cabinet ventilation

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Annual Maintenance

Perform:

• Detailed module inspection
• Signal verification
• Wiring inspection
• Configuration backup
• Calibration review
• Thermal inspection

Maintenance frequency should be increased in environments with vibration, moisture, dust, or significant electrical interference.

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Analog Signal Maintenance Strategy

A reliable analog input system depends on more than the PLC module.

A practical maintenance sequence is:

Step 1 — Verify the Process

Determine whether the actual process variable is behaving normally.

Step 2 — Verify the Sensor

Measure the sensor or transmitter output independently.

Step 3 — Verify Field Wiring

Check cable continuity, terminals, polarity, shielding, and grounding.

Step 4 — Verify the Module

Check module status and channel behavior.

Step 5 — Verify PLC Scaling

Confirm that the raw input is being converted into the correct engineering units.

Step 6 — Verify the Application

Confirm that PLC logic is using the analog value correctly.

This sequence prevents unnecessary module replacement.

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Replacement Considerations

When replacing a GE IC697ALG230, verify:

Check Item	Purpose
Model Number	Confirms correct module
PLC Platform	Ensures system compatibility
Rack Position	Confirms installation location
Signal Type	Prevents incorrect field connection
Wiring	Ensures correct signal path
Scaling	Maintains measurement accuracy
Configuration	Ensures proper PLC operation
Environmental Conditions	Supports long-term reliability

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Compatible System Components

The IC697ALG230 should be considered as one element of a complete analog control loop.

Component	Function
Analog Sensor	Measures Process Variable
Transmitter	Generates Analog Signal
Field Cable	Transfers Signal
IC697ALG230	Analog Input Conversion
PLC CPU	Executes Control Logic
I/O Modules	Interfaces with Other Signals
Output Module	Sends Control Commands
Engineering Workstation	Configuration and Diagnostics
Cabinet Cooling System	Controls Equipment Temperature

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Key Advantages

Analog Process Integration

The module allows continuously varying field information to become part of the PLC control architecture.

Supports Process Monitoring

Analog data can be used to monitor temperature, pressure, flow, level, position, and other process conditions where compatible instrumentation is used.

Enables Closed-Loop Control

Analog feedback can be incorporated into control strategies through the PLC application.

Compact Industrial Design

The supplied dimensions are 138 × 70 × 25 mm, allowing the module to occupy a compact rack position.

Suitable for Industrial Automation

The module is designed for integration into PLC-based control systems rather than standalone measurement applications.

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Frequently Asked Questions

What is the GE IC697ALG230?

The GE IC697ALG230 is an Analog Input Basic Converter Module used to interface analog field signals with compatible GE PLC control systems.

What are its dimensions?

The supplied dimensions are:

138 × 70 × 25 mm

What is its weight?

The listed weight is:

0.8 kg

What does an analog input module do?

It receives continuously varying electrical signals from field instruments and converts them into data that the PLC can process.

What types of process variables can an analog input system monitor?

Depending on the connected instrumentation and configured signal type, applications can include:

• Temperature
• Pressure
• Flow
• Level
• Position
• Speed
• Other continuously varying process variables

Why is an analog input unstable?

Common causes include electrical noise, poor shielding, grounding problems, loose wiring, sensor instability, and incorrect configuration.

Why does the PLC display the wrong engineering value?

Incorrect scaling, signal-range configuration, wiring errors, or sensor calibration problems can cause incorrect engineering values.

How can I determine whether the module or sensor is faulty?

Measure the field signal independently and compare it with the value received by the PLC. If the sensor output is correct but the PLC value is incorrect, investigate the wiring, module, and configuration.

Can the module be replaced while powered?

Unless the host system specifically supports energized module replacement, power should be isolated before removing or installing the module.

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Installation Checklist

Item	Status
Correct IC697ALG230 Identified	✓
Host PLC Verified	✓
Rack Position Confirmed	✓
Application Backed Up	✓
Power Isolated	✓
Module Inspected	✓
Backplane Inspected	✓
Sensor Type Confirmed	✓
Signal Wiring Verified	✓
Shielding Checked	✓
Grounding Checked	✓
Input Configuration Verified	✓
PLC Restarted	✓
Analog Signal Tested	✓
Engineering Value Verified	✓

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Conclusion

The GE IC697ALG230 Analog Input Basic Converter Module provides an important interface between industrial instrumentation and compatible GE PLC control systems. By receiving analog field signals and converting them into controller-readable data, it enables process monitoring, alarm handling, feedback control, and other automation functions.

The supplied physical specifications are 138 × 70 × 25 mm, with a listed weight of 0.8 kg. Correct installation requires more than simply mounting the module in the rack. Technicians should verify the field signal, wiring, shielding, grounding, rack position, configuration, and scaling before commissioning.

When troubleshooting an analog input problem, the most effective approach is to examine the complete signal path—from the sensor and transmitter through the field wiring, input module, PLC configuration, and application logic. This helps distinguish a genuine module failure from problems caused by instrumentation, wiring, configuration, or electrical interference.

With correct installation and regular preventive maintenance, the GE IC697ALG230 can serve as a reliable analog interface within compatible industrial automation and process-control systems.