Siemens 6ES7953-8LF20-0AA0 SIMATIC S7 64KB Micro Memory Card

Overview

SIEMENS SIMATIC S7 MMC

6ES7953-8LF20-0AA0 SIMATIC S7 64KB Micro Memory Card

A 64 KB SIMATIC MMC for compatible controllers and station interfaces, including storage of the PROFINET device name in an IM153-4 PN application.

At a Glance

Brand	Siemens
Model	6ES7953-8LF20-0AA0
Product Type	SIMATIC Micro Memory Card
Core Function	Portable controller and station-data storage
Application	Supported S7-300, C7 and ET 200 applications

Station identity

64 KB is sufficient for the IM153-4 PN device name.

Replacement transfer

Move the card to a replacement interface to carry the stored station name.

Firmware capacity

IM153-4 PN firmware transfer requires at least 2 MB, exceeding this card’s capacity.

Product Overview

6ES7953-8LF20-0AA0 provides 64 KB of 3.3 V NFLASH memory for supported SIMATIC S7-300, C7 and ET 200 equipment.

In an IM153-4 PN installation, the card can retain the PROFINET device name and transfer that identity to a replacement interface, while firmware-update storage requires a larger card.

Ordering focus: Choose the 64 KB card for its intended program or station-data task and distinguish that task from firmware updates that require a higher memory capacity.

Key Functions

Retain a PROFINET station name

The IM153-4 PN can save its assigned device name on the removable memory card, and 64 KB is sufficient for this information.

Transfer identity during interface replacement

Moving the card from the old IM153-4 PN to a replacement interface lets the station recover its saved device name after a supply cycle.

Separate configuration storage from update media

The IM153-4 PN firmware-update workflow requires a card of at least 2 MB rather than a 64 KB device-name card.

Official Specifications

Memory Capacity	64 KB
Nominal Card Voltage	3.3 V
Memory Technology	Nonvolatile NFLASH
Delete/Write Endurance	Up to 100,000 operations at ambient temperatures up to 60 °C
Card Identification	Internal serial number usable for MMC copy protection
Insertion Key	Chamfered corner for orientation in the card receptacle
Service-Life Reference	10 years at ambient temperatures up to 60 °C and no more than 100,000 delete/write operations

Official source:Siemens ET 200M Operating Instructions · Siemens IM151-7 CPU Operating Instructions · Siemens Product Details

Frequently Asked Questions

Is 6ES7953-8LF20-0AA0 large enough to store an IM153-4 PN device name?

A 64 KB SIMATIC Micro Memory Card is sufficient for saving the device name in this interface application.

Can I use 6ES7953-8LF20-0AA0 to transfer firmware to an IM153-4 PN?

The IM153-4 PN firmware-update procedure requires at least 2 MB of card capacity, so a 64 KB card is too small.

How do I carry the station identity to a replacement IM153-4 PN with 6ES7953-8LF20-0AA0?

Move the device-name card from the old interface to the replacement and cycle the supply so the replacement reads the stored name.

Is 6ES7953-8LF20-0AA0 mandatory on every IM153-4 PN hardware revision?

The IM153-4AA00-0XB0 requires the card for the saved device name, while revisions from IM153-4AA01-0XB0 can retain the name inside the interface.

Can I exchange 6ES7953-8LF20-0AA0 live in the IM153-4 PN card slot?

The IM153-4 PN card-handling procedure supports hot-swapping of the SIMATIC Micro Memory Card.

Which shape feature helps orient 6ES7953-8LF20-0AA0 correctly in the slot?

The chamfered corner prevents the card from being inserted in the wrong orientation.

What endurance condition applies to 6ES7953-8LF20-0AA0 in the IM153-4 PN application?

The service-life reference is ten years at ambient temperatures up to 60 °C with no more than 100,000 delete/write operations.

Compatibility & Ordering Notes

Before ordering 6ES7953-8LF20-0AA0: Specify the exact LF20 article and the intended device-name or load-memory task, and use a larger supported card if the planned service operation is a firmware update.

Compatibility Checklist for 6ES7953-8LF20-0AA0

• For an IM153-4 PN application, identify the interface hardware revision because card requirements differ between 4AA00 and later revisions.
• Store and transfer the correct PROFINET device name for the station; the name noname is not permitted in the commissioning workflow.
• Do not use the 64 KB card for the IM153-4 PN firmware-update workflow, which requires at least 2 MB.
• After moving a device-name card to a replacement IM153-4 PN, cycle the interface supply to load the identity.
• Apply hot-swapping only in the documented IM153-4 PN card-handling context; other CPUs have their own removal requirements.

Hot Selling Models