Siemens 6ES5581-2LA11 Mass Storage Module

The 6ES5581-2LA11 provides mass storage capabilities for Siemens SIMATIC S5 systems. This module saves and restores PLC programs and data blocks. Its rectangular frame measures 232 millimeters in width. The module height reaches 210 millimeters exactly. Depth stays at 155 millimeters. You will find this unit weighs approximately 0.88 kilograms. Therefore, installation requires sliding the unit into a standard S5 rack slot. One front-panel memory card slot accepts proprietary storage media.

Physical Layout and Connectors

The front panel features a single memory card slot with a protective cover. Two status LEDs indicate read/write activity and error conditions. A recessed push button initiates the backup or restore process. Four guide rails secure the module firmly in the rack. The front label shows clear instructions for operation steps.

Technical Specifications

Parameter	Specification
Module Width	232 mm
Module Height	210 mm
Module Depth	155 mm
Unit Weight	0.88 kg
Storage Media	Siemens proprietary memory card
Storage Capacity	128 KB (standard)
Component Total	198 discrete parts
Internal Energy Storage	560 µF capacitor bank
Data Retention	10 years (card), 5 years (module)
Backup Time	15 seconds for 32 KB
Restore Time	10 seconds for 32 KB
Operating Temperature	0°C to +60°C

Internal Design and Energy Storage

The 6ES5581-2LA11 contains exactly 198 discrete components inside. A 560 microfarad capacitor bank filters the internal power supply. A dedicated controller manages all read and write operations to the memory card. The module includes write-protect detection for data security. EEPROM stores the card interface firmware permanently. A supercapacitor provides brief power during card insertion and removal.

Operational Performance

This mass storage module backs up entire PLC programs to removable cards. It restores stored programs back to the CPU on demand. Moreover, the unit supports automatic backup on power loss detection. You can store multiple program versions on different memory cards. The module verifies data integrity after each write operation. Two LEDs show current operation status for easy monitoring. Consequently, you achieve reliable offline program storage for S5 systems. Siemens designed this module for program archiving and cloning. Its non-volatile storage retains data without external power.

In summary, the 6ES5581-2LA11 delivers dependable mass storage functionality. Use this module for backing up critical PLC programs. It simplifies machine cloning and disaster recovery. Order this mass storage module for your Siemens S5 system.