1. Product Overview

The Schneider Electric TSXAEZ802 Analog Input Module is an industrial automation component designed for analog signal acquisition within the Modicon TSX Micro automation platform. It enables a compatible programmable logic controller (PLC) to receive current signals from field instruments and use the resulting measurement data for process monitoring, control logic, and industrial equipment coordination.

The TSXAEZ802 supports eight analog input channels and accepts 0–20 mA and 4–20 mA signals. Its 12-bit analog-to-digital conversion capability allows incoming current signals to be represented as digital values for processing by the PLC application.

In industrial installations, analog signals are commonly used to monitor pressure, flow, liquid level, temperature transmitters, and other process variables. By collecting measurements from compatible instruments, the module helps the control system evaluate operating conditions and respond according to the configured application program.

The TSXAEZ802 is particularly relevant to facilities maintaining existing Modicon TSX Micro systems. Before purchasing a replacement, engineers should verify the complete model number, hardware configuration, wiring requirements, and compatibility with the installed controller.

2. Technical Specifications

Technical note: The electrical characteristics above are associated with the TSXAEZ802 product specifications. The physical dimensions are reproduced from the supplied product information; confirm the mechanical drawing before planning a mounting arrangement. The stated acquisition period should not be interpreted as a guarantee of complete application response time.

3. Function and Working Principle

The TSXAEZ802 receives supported current signals from field instruments and makes the corresponding measurement data available to a compatible PLC system.

3.1 Analog Current Signal Acquisition

The module accepts two common industrial current ranges: 0–20 mA and 4–20 mA.

A 4–20 mA loop is widely used in industrial instrumentation because it can transmit measurement information over suitable wiring and allows the live-zero value of 4 mA to be distinguished from a zero-current condition.

For example, a compatible pressure transmitter may use a 4–20 mA output to represent a configured pressure range. The TSXAEZ802 receives the current signal, allowing the PLC application to process the corresponding measurement.

The transmitter’s configured range must match the scaling settings used in the controller program.

3.2 Analog-to-Digital Conversion

The module uses 12-bit analog-to-digital conversion to represent the incoming current signal as a digital value. The PLC can then process the acquired data according to the control program.

The numerical value is interpreted and scaled using the appropriate configuration and programming methods for the installed TSX Micro system.

Correct scaling is essential. If the instrument range and PLC scaling formula do not match, the displayed process value may be incorrect even when the module is receiving a valid signal.

3.3 Eight-Channel Measurement

With eight input channels, the module can collect signals from multiple compatible field instruments within a suitable system configuration.

For example, a process installation may monitor several pressure transmitters, flow transmitters, or level instruments. The exact arrangement depends on the instruments, controller architecture, wiring design, and application requirements.

3.4 Integration with PLC Control Logic

The acquired measurements can be used by the PLC program for monitoring, alarms, sequence control, and process regulation.

A controller may compare a measurement with configured limits, display it on an operator interface, or use it in a control calculation. Actual system functions depend on the application program and connected equipment.

4. Role in Industrial Automation Systems

The TSXAEZ802 provides an interface between compatible current-output instruments and the Modicon TSX Micro control platform.

Process Monitoring

The module allows the controller to acquire current signals from supported field transmitters. The resulting values can be used to monitor changing process conditions and identify deviations from expected operating ranges.

Equipment Coordination

Analog measurements can provide information needed for coordinating pumps, valves, drives, and other machinery. The controller application determines how these measurements affect the operating sequence.

Process Regulation

When incorporated into a correctly designed control loop, analog input data can help a PLC regulate variables such as flow, pressure, or level. Control performance depends on the complete system, including the sensor, input module, controller program, and final control element.

Alarm and Operator Information

The PLC can compare acquired measurements with configured thresholds and generate alarms or status information. When supported by the installed system, measurements can also be presented through an operator interface or supervisory application.

The TSXAEZ802 is a standard analog input module; safety-related functions require appropriately designed and validated safety equipment.

5. Typical Industrial Applications

The TSXAEZ802 can be considered for compatible TSX Micro installations that require 0–20 mA or 4–20 mA signal acquisition.

• Manufacturing machinery: Monitoring current-output transmitters and variable process conditions.
• Water and wastewater systems: Collecting supported pressure, flow, and level measurements.
• Process industries: Acquiring instrument signals for PLC-based process monitoring.
• HVAC systems: Monitoring compatible transmitters used for pressure and other process measurements.
• Packaging equipment: Monitoring process variables used by programmed machine sequences.
• Industrial utilities: Collecting measurement data for equipment supervision.
• Production lines: Integrating multiple current-output instruments into an existing PLC control system.

The suitability of each application depends on the instrument output range, the control-system configuration, and the requirements of the process.

6. Installation and System Integration

Proper installation helps maintain signal quality and reliable operation. Qualified personnel should follow the applicable equipment documentation and site electrical safety procedures.

6.1 Verify the Model and Controller Compatibility

Confirm that the product label identifies the module as TSXAEZ802. Check that the installed PLC platform and hardware configuration support this module.

The TSXAEZ802 is associated with the Modicon TSX Micro platform. It should not be assumed to be directly compatible with unrelated PLC families merely because they are also manufactured by Schneider Electric.

6.2 Isolate Power Before Installation

Place the controlled equipment in a safe condition and follow the facility’s lockout/tagout procedures. Isolate the relevant controller supply and external field circuits as required.

Do not insert or remove the module under power unless the manufacturer explicitly permits the operation for the exact hardware configuration.

6.3 Verify the Current Loop

Before wiring a transmitter, confirm whether it uses a 0–20 mA or 4–20 mA output and verify the wiring arrangement against the module’s documentation.

Check the transmitter’s supply requirements, polarity, loop wiring, and any required external components. Incorrect connections can lead to invalid measurements or equipment damage.

6.4 Check Wiring and Signal Quality

Inspect terminals and cables for loose connections, damage, or corrosion. Route analog wiring according to the approved installation design, with suitable separation from motor cables and other sources of electrical interference.

Follow the manufacturer’s grounding and shielding requirements. Do not assume that individual channels are isolated unless the documentation explicitly confirms this.

6.5 Configure PLC Scaling

Configure the input and application logic using the software and procedures supported by the installed TSX Micro system.

Verify that the PLC program interprets the module’s data correctly and converts it into the required engineering units. For a 4–20 mA transmitter, the scaling should reflect the instrument’s configured measurement range rather than an assumed default.

6.6 Commission the Module

After installation, verify that the module is recognized by the controller and that no unexpected hardware diagnostics are present.

Test each connected channel using appropriate procedures and suitable test equipment. Confirm that the displayed value corresponds to the applied signal and that alarms or control actions operate as intended.

Document the final wiring, channel assignments, scaling parameters, and test results for future maintenance.

7. Troubleshooting Common Problems

Analog input faults may result from the field instrument, wiring, loop power, module, controller configuration, or application program. Diagnosis should consider the complete measurement path.

7.1 Reading Remains at Zero

Possible causes:

• Open current loop.
• Incorrect wiring polarity.
• Missing transmitter power.
• Loose or damaged terminal connections.
• Incorrect channel configuration.
• Defective transmitter.

Recommended checks:

1. Verify the transmitter’s power supply and operating status.
2. Inspect the loop wiring after making the circuit safe.
3. Confirm the signal type and wiring arrangement.
4. Use suitable test equipment to measure the loop current.
5. Check the PLC’s channel assignment and diagnostic information.
6. Determine whether the fault is in the instrument, wiring, or input channel before replacing hardware.

7.2 Reading Is Lower or Higher Than Expected

Possible causes:

• Incorrect transmitter range.
• Incorrect PLC scaling.
• Signal type mismatch.
• Wiring or loop resistance problems.
• Incorrect interpretation of raw input data.

Recommended checks:

Compare the transmitter’s configured measurement range with the PLC scaling parameters. Confirm that the input is configured for the correct current range and use a suitable calibrated instrument to check the actual loop current.

7.3 Unstable Analog Values

Possible causes:

• Electrical interference.
• Loose terminals.
• Poor shielding or grounding.
• Unstable loop power.
• Faulty field instrumentation.
• Process fluctuations.

Recommended checks:

Inspect the wiring route, grounding, and shielding arrangement. Check loop current stability and compare the PLC value with an independent measurement where practical. Determine whether fluctuations correspond to motor switching, equipment startup, or actual changes in the process.

7.4 One Channel Fails While Others Work

Possible causes:

• A fault in the individual transmitter or cable.
• Incorrect channel wiring.
• A configuration problem.
• A defective input channel.

Recommended checks:

Inspect the affected loop and compare its configuration with a known-good channel. Any temporary loop interchange should be performed only when permitted by the system design and after suitable isolation. Avoid changing wiring in a way that could introduce an unsafe or misleading control condition.

7.5 PLC Does Not Recognize the Module

Possible causes:

• Unsupported controller configuration.
• Incorrect installation.
• A hardware connection problem.
• Configuration software or system setup issues.
• A defective module.

Recommended checks:

Verify the exact model number, controller compatibility, mounting, and hardware configuration. Review diagnostic information and consult the applicable technical documentation before replacing additional components.

8. Compatible System Components

The following are general component categories that may be used with a compatible TSX Micro installation. They are not a guarantee that every individual component or configuration is compatible with the TSXAEZ802.

Compatibility must be evaluated using the exact controller, module, field instrument, and software configuration.

9. Replacement and Alternative Selection

The TSXAEZ802 is associated with the legacy Modicon TSX Micro platform. Before purchasing a replacement, confirm whether the original hardware is required to maintain the installed system or whether an engineered migration is appropriate.

Replacement Recommendations

An exact TSXAEZ802 replacement with verified identification is generally the most straightforward choice when maintaining the original installation.

If the module is unavailable, an alternative should be selected only after checking the required current ranges, number of channels, electrical characteristics, controller compatibility, wiring arrangement, and software support. A different module may require hardware changes, program modifications, and additional commissioning.

Do not assume that a similar-looking analog input module can be installed without changes.

10. Key Advantages of the TSXAEZ802

Eight-Channel Signal Acquisition

The module supports eight analog current input channels, allowing multiple compatible transmitters to be integrated into a suitable control system.

Support for Common Current Ranges

Its 0–20 mA and 4–20 mA input capabilities accommodate common industrial measurement interfaces.

Integration with Existing TSX Micro Systems

For compatible installations, the module supports analog measurement acquisition within the established Modicon TSX Micro architecture.

Structured Process Monitoring

Measurements acquired by the module can be used by the PLC application for monitoring, alarms, and control calculations.

Practical Spare-Parts Identification

The model number and documented electrical characteristics help maintenance teams evaluate replacement suitability and manage legacy automation spare parts.

11. Frequently Asked Questions

What is the Schneider TSXAEZ802 Analog Input Module?

The TSXAEZ802 is an eight-channel analog input module for the Modicon TSX Micro automation platform. It accepts 0–20 mA and 4–20 mA current signals.

How many input channels does the TSXAEZ802 have?

The module has eight analog input channels.

What signal types does it support?

The documented input types are 0–20 mA and 4–20 mA.

What is its analog-to-digital conversion resolution?

The documented analog-to-digital conversion resolution is 12 bits.

What are the dimensions and weight?

The supplied dimensions are 121 × 82 × 50 mm, and the supplied weight is 0.2 kg. Confirm the physical drawing if exact mounting dimensions are critical.

Can the TSXAEZ802 be used with any Schneider PLC?

No. It is associated with the Modicon TSX Micro automation platform. Compatibility with a particular controller and configuration must be verified before installation.

What should buyers check before ordering?

Confirm the exact part number, channel count, input ranges, controller compatibility, product condition, and supplier testing or warranty terms. For replacement projects, comparing the product label and connectors with the installed unit is also recommended.

12. Conclusion

The Schneider TSXAEZ802 Analog Input Module is an eight-channel current-input module for compatible Modicon TSX Micro automation systems. It supports 0–20 mA and 4–20 mA signals and provides 12-bit analog-to-digital conversion for industrial measurement applications.

Its supplied dimensions of 121 × 82 × 50 mm and weight of 0.2 kg are useful for procurement and installation planning. Successful integration depends on confirming the complete hardware configuration, current-loop wiring, input scaling, and controller compatibility.

For industrial maintenance and spare-parts procurement, accurate model identification and systematic commissioning checks help reduce compatibility risks and support reliable process monitoring.