Siemens 6ES7952-1KM00-0AA0 SIMATIC S7-400 Memory Card

The Siemens 6ES7952-1KM00-0AA0 serves as the primary 6ES7952-1KM00-0AA0 Flash EPROM Memory Card utilized to execute non-volatile program backup and data block storage across SIMATIC S7-400 controller platforms. This long-design hardware sub-module interfaces directly with the central processing unit expansion slot, utilizing a 5 V operating voltage to retain structured user code and system configuration profiles. The module ensures data security by preventing loss of user application blocks during complete power source failures independent of battery backup status.

Hardware Specifications

Deterministic Network Routing and Firmware Compatibility

This hardware storage component maintains rigid alignment with backplane bus communication velocity parameters, matching block-transfer protocols required by Profinet and EtherNet/IP deterministic networks. The internal solid-state registers support synchronized code retrieval loops during initial boot execution, preventing CPU cycle timeouts regardless of application I/O density scaling. The non-volatile 4 Mbytes structure exhibits strict firmware flash compatibility with S7-400 processing modules, ensuring secure execution images can be transferred and sustained without inserting addressing delays or block corruption errors into the hardware controller.

Frequently Asked Questions

Q: Is it permissible to insert or extract the 6ES7952-1KM00-0AA0 card while the S7-400 CPU is running in "RUN" mode?

A: No. Memory card manipulation during active processing causes the CPU to enter a fault state and stop execution. The controller must be switched to "STOP" mode or powered down completely before card extraction.

Q: Does the Flash EPROM card require a continuous battery backup to retain the loaded program?

A: No. Unlike RAM cards, Flash EPROM technology utilizes non-volatile cells that retain the application firmware and system block data indefinitely without drawing power from the lithium battery on the CPU rack.

Q: How is data written to this specific 5 V memory card hardware?

A: Writing requires either direct loading via the SIMATIC S7-400 CPU assembly during an operational program transfer or an external Siemens programming device equipped with a dedicated memory card slot.

Field Installation Guidelines

• Verify that the controller mode switch is set to the "STOP" position or completely de-energized before inserting the card into the module slot.
• Align the long-design card edges carefully inside the CPU guide rails to avoid mechanical deformation of the internal 5 V connecting pins.
• Discharge all localized static electricity from field tools and clothing by grounding to the enclosure cabinet before handling the memory module.
• Prevent installation inside high-humidity environments where condensation could bridge the exposed gold interface pads.