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- 6AG1952-1AP00-7AA0
- RAM Memory Card
- Germany
- 134 × 91 × 15 mm
- 0.055 kg
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Product Overview
The Siemens 6AG1952-1AP00-7AA0 SIPLUS S7-400 RAM Memory Card is an industrial memory accessory designed for Siemens SIMATIC S7-400 programmable logic controllers. It provides 8 MB of RAM storage for supported S7-400 CPU configurations and is intended for applications where reliable program and data storage is essential to continuous industrial automation.
This model is based on the standard Siemens memory card 6ES7952-1AP00-0AA0 and belongs to the SIPLUS product range. Compared with the corresponding standard version, the SIPLUS configuration includes conformal coating and an extended operating temperature range of -25°C to +70°C. These characteristics make it suitable for selected industrial environments where temperature variation and exposure to environmental contaminants require additional consideration.
Memory cards are important components in programmable controller systems. They provide storage capacity for control programs and associated data, depending on the CPU architecture and supported memory functions. In an S7-400 installation, the memory card must be compatible with the installed CPU and its firmware and configuration requirements.
The 6AG1952-1AP00-7AA0 uses a long-design memory-card format intended for supported S7-400 equipment. Its 8 MB capacity provides storage for applications that require more memory than smaller-capacity cards. Correct selection is important because different S7-400 CPUs and memory-card variants may have different compatibility requirements.
For industrial maintenance teams, this model can be relevant when replacing an existing SIPLUS memory card, restoring a controller configuration, or maintaining equipment operating in demanding environments. Before installation, engineers should confirm the exact CPU model, memory-card type, program requirements, and backup procedures.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Siemens |
| Product Series | SIPLUS S7-400 |
| Model | 6AG1952-1AP00-7AA0 |
| Product Type | RAM Memory Card |
| Memory Technology | RAM |
| Memory Capacity | 8 MB |
| Standard Base Model | 6ES7952-1AP00-0AA0 |
| Compatible Controller Family | SIMATIC S7-400 |
| Card Design | Long design |
| Conformal Coating | Included |
| Operating Temperature | -25°C to +70°C |
| Product Application | PLC program and data memory |
| Dimensions Provided | 134 × 91 × 15 mm |
| Weight Provided | 0.055 kg |
| Product Category | Industrial Automation Memory Accessory |
Note: Dimensions and weight are supplied listing values. Confirm the exact physical measurements and packaging specifications before using them for installation or shipping calculations.
Function and Working Principle
The Siemens 6AG1952-1AP00-7AA0 provides memory capacity for supported SIMATIC S7-400 controller configurations. Its function is closely related to the CPU’s memory architecture and the way the automation program is stored and managed.
1. PLC Program Storage
A programmable logic controller executes a user program to control industrial equipment. The program may contain logic for machine sequencing, process interlocks, signal processing, alarm handling, and communication with other automation devices.
The memory card provides storage capacity for the supported controller’s program and related information. Its 8 MB capacity is intended for S7-400 applications that require the corresponding memory-card specification.
The amount of memory required depends on the program structure, data blocks, configuration, and application complexity.
2. Data Storage and Memory Management
In an S7-400 system, memory is used for different types of information, including program instructions, data blocks, and controller-related information. The CPU manages memory according to its architecture and configuration.
The memory card must be suitable for the installed CPU. It should not be treated as a universal memory device that can be inserted into any Siemens PLC.
Engineers should check the CPU manual and system documentation to determine how the selected memory card is used and which data is stored or retained under different power conditions.
3. 8 MB Memory Capacity
The 8 MB capacity provides storage for supported S7-400 applications. It may be relevant to systems containing multiple program blocks, extensive data structures, or complex control sequences.
The required memory capacity should be evaluated before selecting a replacement. A card with a different capacity or technology may not be an appropriate substitute even if its physical design appears similar.
4. Conformal Coating Protection
The SIPLUS version includes conformal coating. This protective coating is applied to electronic assemblies to help reduce the effects of environmental exposure under specified operating conditions.
It is particularly relevant in industrial applications where humidity, condensation, dust, or chemically active substances may affect electronic equipment.
Conformal coating does not make the memory card waterproof or suitable for unrestricted exposure to liquids. The installation must still comply with the product’s environmental limits.
5. Extended Temperature Operation
The specified operating temperature range is -25°C to +70°C. This extended range distinguishes the SIPLUS configuration from many standard industrial components.
It provides additional flexibility for equipment installed in environments with wider temperature variation. However, the operating limits of the complete PLC system are determined by all installed components, not just the memory card.
Role in Siemens SIMATIC S7-400 Control Systems
The 6AG1952-1AP00-7AA0 is designed for supported SIMATIC S7-400 configurations. It serves as a memory accessory within the controller architecture rather than functioning as an independent processing or I/O module.
1. Support for S7-400 CPU Operation
The S7-400 family is used in industrial automation systems requiring modular control, extensive I/O, and integration with plant-level equipment.
The CPU executes the automation program, processes input signals, and generates output commands. The memory card provides the specified memory resource required by compatible CPU configurations.
The exact memory-card requirements depend on the CPU model and its supported hardware configuration.
2. Program Backup and Maintenance
Memory-card handling is an important part of PLC maintenance. When replacing a card, maintenance personnel should confirm whether the original program and required data have been backed up.
A replacement card should not be assumed to contain the existing machine program. If the card is blank or contains different data, the controller may require program restoration and commissioning before returning to service.
3. Integration with Industrial I/O
The S7-400 CPU works with digital and analog I/O modules to monitor field signals and control industrial equipment.
The memory card supports the controller’s memory requirements, while the I/O modules perform signal acquisition and output control. Together, these components form part of the automation system.
4. Support for Process Automation
In process-control installations, the S7-400 may coordinate pumps, motors, valves, transmitters, and other field equipment. The memory card supports the storage requirements of the controller application.
Reliable program storage and proper maintenance procedures are important for reducing recovery time after component replacement or controller servicing.
Industrial Applications
The Siemens SIPLUS S7-400 8 MB RAM memory card can be used in supported industrial automation installations where the S7-400 platform is deployed.
1. Manufacturing Automation
Manufacturing systems often use PLCs to coordinate production sequences, machine interlocks, conveyor operation, and material handling.
The 8 MB memory card provides storage capacity for supported S7-400 controller configurations used in these applications.
2. Process Control Systems
Process plants may use S7-400 controllers to coordinate pumps, valves, motors, and measurement devices. The memory card supports the controller’s program and data-memory requirements.
In these environments, the SIPLUS temperature range and conformal coating may be relevant where specified environmental conditions exceed those of standard equipment.
3. Chemical and Industrial Processing
Industrial processing facilities may experience humidity, airborne contaminants, and temperature variation. Components with appropriate environmental protection can help support equipment reliability.
The SIPLUS version’s conformal coating and extended temperature range make it a candidate for installations that meet its documented environmental specifications.
4. Energy and Utility Facilities
Power generation and utility installations may use PLC-based automation for auxiliary equipment, monitoring, and equipment coordination.
The memory card can support compatible S7-400 controller systems used in these applications. Correct CPU compatibility and program backup remain essential.
5. Infrastructure and Large Equipment Systems
Large industrial machines and infrastructure systems may rely on S7-400 controllers for equipment sequencing and process coordination.
Where an existing system uses the 6AG1952-1AP00-7AA0, maintaining an identical spare can simplify replacement planning and help preserve the original hardware configuration.
Installation and System Integration
Correct installation is essential for reliable controller operation and protection of stored application data.
1. Verify CPU Compatibility
Before purchasing or installing the memory card, identify the exact SIMATIC S7-400 CPU model.
Confirm that the CPU supports the 8 MB RAM memory card and the long-design format. Do not assume compatibility based only on the S7-400 family name.
2. Confirm the Memory Card Type
The 6AG1952-1AP00-7AA0 is an 8 MB RAM memory card. It is not interchangeable with every S7-400 memory card.
RAM and FEPROM memory cards use different memory technologies and have different characteristics. A replacement must match the requirements of the CPU and application.
3. Back Up the Existing Program
Before removing an installed memory card, follow the applicable Siemens maintenance procedure and back up the controller program and relevant data.
Confirm the backup is readable and corresponds to the correct machine or process. For critical installations, maintain a documented recovery procedure.
4. Handle the Card Carefully
Memory cards are electronic components and should be handled using appropriate electrostatic discharge precautions.
Avoid touching electrical contacts unnecessarily. Keep the card clean and dry, and inspect the connector area before installation.
5. Install According to CPU Instructions
Follow the CPU-specific installation procedure. Confirm the correct orientation and insertion method, and do not force the card into the slot.
The controller should be placed in the required maintenance or power state before card replacement. Follow the equipment documentation to avoid damaging the CPU or losing important data.
6. Verify Controller Operation
After installation, check the CPU diagnostic indicators and confirm that the controller recognizes the memory card.
If the system reports a memory or configuration fault, verify the card type, CPU compatibility, program contents, and installation procedure before attempting further operation.
Compatible System Components
The 6AG1952-1AP00-7AA0 is used with supported Siemens S7-400 equipment. The following components illustrate the wider controller environment.
| Component | Function | Integration Consideration |
|---|---|---|
| SIMATIC S7-400 CPU | Executes the automation program | Confirm support for the 8 MB RAM card |
| S7-400 Rack | Provides mounting and backplane connections | Select a rack compatible with the installed CPU |
| Digital Input Module | Acquires discrete field signals | Configure according to the controller hardware setup |
| Digital Output Module | Controls discrete field devices | Check voltage, current, and load requirements |
| Analog Input Module | Reads process measurement signals | Verify signal type and channel configuration |
| Analog Output Module | Sends analog control references | Confirm connected device requirements |
| Power Supply Module | Supplies the PLC rack | Verify the required supply and load capacity |
| Programming Device | Used for PLC configuration and diagnostics | Use compatible engineering software and interfaces |
| Industrial Communication Module | Connects the PLC to other automation equipment | Verify network protocol and module compatibility |
These are system-level examples, not items included with the memory card. Exact compatibility must be checked against the CPU and system documentation.
Alternative Models and Replacement Considerations
The 6AG1952-1AP00-7AA0 is based on the standard Siemens 6ES7952-1AP00-0AA0 memory card, with SIPLUS environmental enhancements.
| Model | Description | Replacement Considerations |
|---|---|---|
| 6ES7952-1AP00-0AA0 | Standard SIMATIC S7-400 8 MB RAM memory card | Base model; check environmental requirements before substitution |
| 6AG1952-1AM00-7AA0 | SIPLUS S7-400 4 MB RAM memory card | Different capacity; not a direct equivalent |
| 6AG1952-1AS00-7AA0 | SIPLUS S7-400 16 MB RAM memory card | Higher capacity; verify CPU support |
| 6AG1952-1AY00-7AA0 | SIPLUS S7-400 64 MB RAM memory card | Different capacity; verify CPU and application compatibility |
| 6AG1952-1KT00-4AA0 | SIPLUS S7-400 FEPROM memory card | Different memory technology; not a direct RAM replacement |
Before selecting an alternative, verify:
- CPU model and hardware revision.
- Required memory-card technology.
- Memory capacity.
- Long-design mechanical format.
- Operating temperature requirements.
- Environmental protection requirements.
- Existing program and data backup.
- Controller firmware and configuration compatibility.
A memory card with a larger capacity is not automatically a valid replacement. The CPU must support the selected card and memory configuration.
Key Advantages
8 MB Storage Capacity
The 8 MB RAM capacity supports compatible S7-400 controller applications with corresponding memory requirements.
SIPLUS Environmental Design
The SIPLUS configuration includes conformal coating, providing additional protection for the electronic assembly under the specified environmental conditions.
Extended Operating Temperature
The -25°C to +70°C operating range supports installations requiring a wider temperature envelope than standard configurations.
Compatibility with S7-400 Systems
The card is designed for supported SIMATIC S7-400 CPU configurations, making it relevant to maintenance and replacement projects involving this PLC family.
Long-Design Format
Its long-design form is intended for the corresponding S7-400 memory-card interface.
Industrial Maintenance Support
Keeping an accurately identified spare memory card can help maintenance teams prepare for controller servicing and reduce delays associated with sourcing the correct component.
Technical FAQs
1. What is the Siemens 6AG1952-1AP00-7AA0?
It is a SIPLUS S7-400 RAM memory card with 8 MB capacity. It is designed for supported SIMATIC S7-400 CPUs and includes conformal coating.
2. What is the memory capacity?
The card provides 8 MB of RAM memory.
3. What is the standard base model?
The 6AG1952-1AP00-7AA0 is based on the standard Siemens 6ES7952-1AP00-0AA0 memory card.
4. What is the operating temperature range?
The specified operating temperature range is -25°C to +70°C.
5. What is the purpose of the conformal coating?
Conformal coating helps protect the electronic assembly against specified environmental influences. It does not make the card waterproof or suitable for unrestricted exposure to liquids.
6. Which PLC family is it designed for?
It is designed for supported Siemens SIMATIC S7-400 CPUs. The exact CPU model must be checked before installation.
7. Is it interchangeable with an FEPROM memory card?
No. RAM and FEPROM cards use different memory technologies. The replacement must match the CPU’s requirements and the application design.
8. Can it be used with any Siemens PLC?
No. It is specifically intended for compatible S7-400 systems and should not be treated as a universal Siemens PLC memory card.
9. What should be checked before replacement?
Verify the CPU model, memory capacity, card type, mechanical format, operating conditions, and backup status of the existing controller program.
10. Does the memory card contain the machine program?
The card may contain application data when supplied from an existing configured system, but a replacement or unused card should not be assumed to contain the required program. Confirm its contents and restore the correct backup when necessary.
Procurement and Maintenance Recommendations
When purchasing the Siemens 6AG1952-1AP00-7AA0, verify the complete part number and confirm that the product is the SIPLUS 8 MB RAM version rather than a standard memory card or another capacity variant.
For replacement projects, compare the card with the existing component and check the CPU’s supported memory-card specifications. Confirm the condition of the connector, housing, and card contacts. If the card is supplied as used or refurbished equipment, request appropriate testing and clear product photographs.
Memory-card maintenance should include a reliable backup strategy. Store a verified copy of the PLC program and relevant data in an approved location, and document the CPU model and memory-card configuration. This information can help reduce recovery time following equipment failure.
During handling, use electrostatic discharge precautions and follow the CPU-specific installation procedure. Do not remove or insert the card without checking the controller’s required operating state.
For applications with demanding environmental conditions, confirm that the actual installation remains within the specified temperature and environmental limits. The SIPLUS coating provides additional protection, but correct cabinet design and system-level environmental control remain necessary.
Conclusion
The Siemens 6AG1952-1AP00-7AA0 SIPLUS S7-400 RAM Memory Card is an 8 MB memory accessory designed for compatible SIMATIC S7-400 controllers. Based on the standard 6ES7952-1AP00-0AA0 model, it adds conformal coating and an extended operating temperature range of -25°C to +70°C.
Its long-design format and industrial environmental features make it relevant to S7-400 maintenance, replacement, and spare-parts applications. Before purchasing or installing the card, verify CPU compatibility, memory technology, capacity, and the availability of a complete program backup.