1. Product Overview

The Schneider Electric TSXMRPP224K SRAM Application Memory Expansion is a dedicated memory accessory designed for compatible Modicon Premium programmable logic controllers (PLCs). With a nominal application-memory capacity of 224 KB, this SRAM memory card provides additional storage for PLC application programs within supported industrial automation systems.

In industrial control applications, a PLC must store the logic and instructions required to operate machinery, coordinate production sequences, process input signals, and control output devices. The available application memory influences the size and complexity of programs that a controller can accommodate. When the original memory configuration needs to be maintained or replaced, a compatible memory expansion card can be an important component of the system’s hardware configuration.

The TSXMRPP224K is specifically categorized as an SRAM application memory expansion for the Modicon Premium automation platform. It is designed for use with supported processor models and is installed in the designated memory-card slot. Its function is to provide application-memory capacity rather than operate as an independent controller or I/O module.

The card is relevant to industrial facilities that continue to operate legacy Schneider Electric PLC systems. These systems may control production machinery, assembly equipment, packaging lines, and other industrial processes where replacing the entire controller would require substantial engineering and commissioning work.

Because the TSXMRPP224K is a discontinued product, selecting the correct reference is especially important. Buyers and maintenance engineers should verify the processor model, application requirements, memory-card condition, and applicable data-retention procedures before purchasing or installing a replacement.

2. Technical Specifications

The dimensions and weight above are based on the supplied product information. Processor compatibility and the usable application-memory capacity should be confirmed against the documentation for the exact PLC configuration.

3. Function and Working Principle

3.1 SRAM Application Memory

SRAM stands for static random-access memory. It is a semiconductor memory technology used in electronic systems for fast access to stored information.

In a PLC, application memory holds the program instructions and associated application information required by the controller. The processor executes the supported program to determine how the system responds to sensor signals, operating conditions, and control commands.

The TSXMRPP224K provides 224 KB of application memory for compatible Modicon Premium processors. It is a memory accessory rather than a processor in its own right. The PLC CPU remains responsible for executing the program, processing I/O, and coordinating supported communications.

3.2 Application Program Storage

Industrial PLC applications can contain a variety of control functions, including:

• Sequential machine-control logic.
• Motor and actuator interlocks.
• Timer and counter operations.
• Equipment start-up and shutdown sequences.
• Alarm and fault-handling logic.
• Process-control routines.
• Communication and data-processing instructions, where supported.

The TSXMRPP224K provides additional application-memory capacity within the limits of the supported processor and programming environment. The actual program that can be stored depends on the application structure, the processor’s capabilities, and the memory requirements of the installed software.

The 224 KB rating should not be interpreted as a guarantee that every PLC application can use the entire capacity for every type of program data. The programming environment and controller configuration determine the practical memory available to a particular project.

3.3 Dedicated Application Memory Versus Data Storage

Application memory and data-file memory serve different purposes in an automation system.

Application memory primarily accommodates the control program. Data-file memory, where supported, can be used for information such as recipes, production records, and other application-specific data.

The TSXMRPP224K is classified as an application-memory expansion. It should not be confused with dedicated SRAM file-memory cards or configurable memory cards that divide capacity between application and data storage.

Choosing the correct card requires understanding which memory resource the PLC application needs. A card designed for data files is not automatically a substitute for an application-memory expansion, even if both products use SRAM technology.

3.4 Program Modification and Maintenance

Schneider Electric’s documentation for the relevant memory-card family indicates that SRAM-based application storage can support online program modifications under supported conditions. This capability depends on the processor, application, programming software, and system configuration.

Before performing online changes, engineers should verify the applicable programming procedure and assess the operational risks. Changes to a running control program can affect production equipment and should be managed through the site’s approved engineering and safety processes.

3.5 Memory Retention Considerations

SRAM is volatile memory technology. Data retention depends on the memory card’s design and its supported backup or power-retention arrangements.

Maintenance personnel should check the relevant documentation for retention requirements before removing the card or disconnecting equipment. A verified application backup should be maintained so the control program can be recovered if the original card becomes damaged or unavailable.

Do not assume that a removed memory card will preserve its contents indefinitely or that every used card contains the latest version of the PLC application.

4. Role in Industrial Automation Systems

4.1 Supporting Existing PLC Applications

Many factories operate control systems that were commissioned years ago. Their PLC programs may be closely integrated with machinery, operator interfaces, electrical cabinets, I/O modules, and plant operating procedures.

Replacing the controller can require program migration, hardware redesign, communication testing, commissioning, and production downtime. When the existing processor remains suitable and supports the TSXMRPP224K, maintaining the correct application-memory configuration can help preserve the established system architecture.

The memory card does not independently increase processor speed or add new I/O capabilities. Its role is to provide the supported memory resource required by the existing controller configuration.

4.2 Maintaining Control Logic

Machine-control programs define how equipment responds to input signals and operating conditions. For example, a production line may require a defined sequence of conveyor starts, product detection, positioning, processing, and discharge.

The PLC executes this sequence using its application program and connected hardware. A compatible application-memory expansion can support the storage requirements of the program where the processor and application are configured accordingly.

The card’s suitability depends on the exact processor reference and the memory requirements of the control software.

4.3 Supporting Legacy System Reliability

For industrial facilities maintaining legacy Modicon Premium systems, an exact replacement memory card can be an important spare part. Keeping the correct reference available may help maintenance teams respond to card failure or hardware damage.

However, replacing a memory card is not simply a matter of matching its physical size. The replacement must be compatible with the processor and appropriate for the application-memory configuration.

4.4 Preserving Existing Engineering Work

A mature PLC application may contain years of engineering work, including equipment sequencing, interlocks, alarms, and machine-specific logic. Maintaining the original memory architecture can help reduce unnecessary changes to a validated control system.

Before changing memory hardware, engineers should document the current application version and ensure that a verified backup is available. This is particularly important for discontinued products where obtaining another identical card may become increasingly difficult.

5. Industrial Applications

Manufacturing and Assembly Lines

Manufacturing equipment often relies on PLC programs to coordinate sensors, motors, actuators, and machine sequences. The TSXMRPP224K may be relevant where a compatible Modicon Premium processor uses this application-memory configuration.

Typical environments include automated assembly stations, production machinery, material-handling systems, and dedicated manufacturing cells.

Packaging Machinery

Packaging systems can involve product detection, sequencing, timing, interlocks, and fault handling. The PLC program coordinates these functions to maintain the intended operating sequence.

A supported application-memory expansion can help accommodate the program requirements of an established controller. The card does not independently provide packaging functions; those functions depend on the PLC application and connected equipment.

Industrial Process Equipment

Process equipment may use PLC logic for start-up sequences, permissive checks, equipment coordination, and alarm handling. Where a compatible Modicon Premium processor remains in operation, maintaining the correct application memory can be part of a broader maintenance strategy.

Process measurements, regulation, and actuator control still depend on the processor, I/O modules, instruments, and application configuration.

Material Handling and Conveyor Systems

Conveyor systems and automated handling equipment use control logic to manage motor operation, transfer sequences, sensor states, and safety interlocks. The TSXMRPP224K may be relevant when maintaining the application-memory configuration of a supported legacy PLC.

Legacy Automation Maintenance

The TSXMRPP224K is particularly relevant to maintenance teams responsible for older Modicon Premium installations. It can be considered when identifying a spare or replacement for an existing application-memory card.

For replacement projects, verify the original part number and processor reference before purchasing. A card with a similar designation or higher nominal capacity should not be assumed to be compatible.

6. Installation and System Integration

Correct installation requires attention to processor compatibility, the designated memory-card slot, application backups, and the manufacturer’s handling procedures.

6.1 Confirm the PLC Processor

Before ordering the TSXMRPP224K, identify the full reference of the installed Modicon Premium processor.

The documented compatibility range includes TSX570 to TSX574, TSX57C, and TSXPCI572/3. Compatibility must still be checked against the exact processor version and the relevant hardware documentation.

Do not rely solely on the general Modicon Premium product-family name when selecting a memory card.

6.2 Verify the Installation Slot

The TSXMRPP224K is specified for Slot 0 on supported processors. Confirm the processor’s slot arrangement and installation instructions before fitting the card.

Follow the manufacturer’s procedures and site safety requirements. Do not insert or remove the card while the equipment is energized unless the manufacturer explicitly permits the operation for the exact configuration.

6.3 Back Up the PLC Application

Before replacing the memory card, create and verify a backup of the PLC application using the supported programming environment.

Where applicable, record the application version, processor reference, and relevant configuration information. Confirm that the backup is accessible and that the maintenance team has a documented recovery procedure.

A memory card removed from an operating controller should not automatically be treated as a verified backup of the latest program.

6.4 Observe ESD Precautions

Electronic memory accessories can be damaged by electrostatic discharge. Use appropriate ESD protection when handling the card, avoid touching exposed contacts, and store the component in suitable protective packaging when not installed.

Inspect the card for visible damage, contamination, or connector wear before installation.

6.5 Verify Application Memory

After installation, follow the approved procedure to confirm that the processor recognizes the memory card and that the application is available as expected.

Check controller diagnostics and application status before returning the equipment to service. If the card is being installed as part of a recovery operation, confirm that the correct program and configuration have been restored.

6.6 Plan for Data Retention

Because SRAM is volatile, confirm the applicable retention and backup arrangements for the exact card. Follow the manufacturer’s guidance when removing the card, powering down the processor, or storing the component.

For critical machinery, retain a verified application backup and document the recovery process before carrying out replacement work.

7. Compatible System Components

The following table describes the main system elements associated with the TSXMRPP224K. Compatibility should be confirmed against the complete hardware references.

This table describes functional relationships and does not guarantee that every component can be used together in every installation.

8. Related Memory Expansion Models

The following Schneider Electric memory products are useful for comparison when reviewing legacy Modicon Premium spare parts. They are not confirmed direct replacements for the TSXMRPP224K.

Selection should be based on the processor’s supported memory cards, application requirements, memory technology, and software environment. A higher-capacity card or a card with the same general memory technology is not necessarily a compatible replacement.

9. Key Advantages

Dedicated Application-Memory Expansion

The TSXMRPP224K provides 224 KB of SRAM application memory for supported Modicon Premium processors, helping accommodate the memory requirements of compatible PLC programs.

Support for Established Control Systems

Where the original processor remains suitable, the card can help maintain an existing PLC hardware configuration without requiring an immediate replacement of the complete controller.

Compatibility with Defined Processor Families

The documented processor compatibility range gives engineers a starting point for evaluating suitability. The exact processor reference and configuration must still be verified before installation.

Compact, Lightweight Design

The supplied dimensions are 132 × 91 × 26 mm, and the supplied weight is 0.076 kg. These specifications can assist with spare-parts identification and logistics planning.

Useful for Legacy Spare-Parts Management

For facilities operating older PLC systems, maintaining the correct memory card can support maintenance planning and reduce the uncertainty associated with finding a compatible component after a failure.

10. Technical FAQs

Q1: What is the Schneider Electric TSXMRPP224K?

The TSXMRPP224K is an SRAM application-memory expansion designed for compatible Schneider Electric Modicon Premium PLC processors.

Q2: What is the memory capacity of the TSXMRPP224K?

The card provides 224 KB of application memory.

Q3: Which PLC processors support the TSXMRPP224K?

The documented compatibility families include TSX570 to TSX574, TSX57C, and TSXPCI572/3. Always confirm the complete processor reference before purchase.

Q4: Where is the TSXMRPP224K installed?

The card is specified for Slot 0 on supported processors. Confirm the installation instructions for the exact processor model.

Q5: Is the TSXMRPP224K a PLC CPU?

No. It is a memory expansion accessory. The PLC processor executes the control program and manages supported I/O and communications.

Q6: What is the difference between application memory and file memory?

Application memory stores the PLC program, while file memory supports data-storage functions provided by the platform. The TSXMRPP224K is classified as an application-memory expansion, so it should not be confused with a dedicated file-memory card.

Q7: Is the TSXMRPP224K discontinued?

Yes. Schneider Electric’s product information identifies the reference as discontinued and states that it has not been replaced. The listed service end date varies by regional product information, so confirm the applicable lifecycle status for your market.

Q8: Can another memory card replace the TSXMRPP224K?

Not automatically. Different cards can use different memory technologies, capacities, and allocation arrangements. Verify processor compatibility and application requirements before selecting an alternative.

Q9: What are the dimensions and weight of the TSXMRPP224K?

The supplied dimensions are 132 × 91 × 26 mm, and the supplied weight is 0.076 kg.

Q10: Should the PLC application be backed up before replacing the memory card?

Yes. Create and verify an application backup and follow the manufacturer’s procedures for handling the card and restoring the application. Confirm any data-retention requirements before removing the original component.

11. Procurement and Replacement Considerations

The TSXMRPP224K is a discontinued industrial automation component. Procurement should therefore focus on exact identification, condition verification, and compatibility with the installed controller.

Before placing an order, confirm the complete part number against the existing card or equipment documentation. Ask the supplier to identify whether the component is new old stock, unused surplus, refurbished, or previously installed. For used or surplus parts, request clear photographs of the actual product and confirmation of any testing performed.

When planning a replacement, verify the processor model, designated memory slot, application-memory requirement, and available programming environment. If an alternative model is proposed, check its supported processor range and memory architecture rather than relying on nominal capacity alone.

For critical industrial equipment, keep a verified application backup and establish a documented restoration procedure. After installation, check the processor diagnostics and validate the relevant control functions before returning the system to normal production.

12. Conclusion

The Schneider Electric TSXMRPP224K SRAM Application Memory Expansion is a 224 KB memory accessory designed for compatible Modicon Premium PLC processors. Its primary purpose is to provide application-memory capacity for supported legacy automation systems.

With a supplied weight of 0.076 kg and a specified installation position in Slot 0, the TSXMRPP224K may be relevant to industrial maintenance, PLC program-memory replacement, and spare-parts planning. Its suitability depends on the exact processor model and application configuration.

Because the product is discontinued and no direct replacement is listed in the referenced Schneider Electric product information, buyers should verify compatibility, product condition, and application-recovery requirements before purchase. Accurate part identification and a verified backup strategy are essential for maintaining legacy industrial control systems.