Siemens 6ES79538LP310AA0 Mmc Memory Card Plc Storage

Product Description

The SIEMENS 6ES79538LP310AA0 is a MultiMediaCard (MMC) memory module designed for use with Siemens SIMATIC S7-300 series programmable logic controllers. It provides non-volatile program and data storage, allowing the CPU to retain user programs, data blocks, and configuration settings without battery backup. The card slots directly into the CPU module and is recognized as the load memory for the controller. Licensed HVAC controls technicians, industrial electricians, and automation specialists working on PLC-based control systems install and replace this component during commissioning or after a card failure.

This memory card is used in industrial automation environments where SIMATIC S7-300 CPUs require onboard load memory for program storage. Typical applications include building automation controls, industrial process equipment, HVAC unit controllers built around S7-300 hardware, and other machine control panels. The card is inserted during initial PLC setup or as a direct replacement for a failed or corrupted MMC in an existing installation. It supports standard MMC program transfer operations via the CPU front panel slot.

Key Features

• Non-volatile MMC storage retains program data without a battery
• Direct load memory replacement for SIMATIC S7-300 CPU modules
• Compact card form factor fits the standard S7-300 CPU front-panel slot
• Supports user programs, data blocks, and configuration retention
• Lightweight at 0.066 pounds for easy handling during installation

Compatibility

Designed as an OEM-style MMC load memory replacement for Siemens SIMATIC S7-300 series PLC CPU modules that accept a front-panel MMC slot.

Installation Notes

Installation should be performed by a qualified industrial electrician or PLC technician familiar with SIMATIC S7 hardware. Power down the PLC and place the CPU in STOP mode before inserting or removing the memory card to avoid data corruption or hardware faults. Program transfer to the card is typically performed using the SIMATIC Manager or TIA Portal software following Siemens documented procedures. Consult applicable NEC guidelines and the site safety plan before working inside any control panel.

Technical Specifications

• Package Weight: 0.066 pounds
• Package Length: 4.173 inches
• Package Width: 3.661 inches
• Package Height: 0.197 inches
• UPC: 88762144545

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 6ES79538LP310AA0