Siemens 6ES5374-1KG11 | SIMATIC S5 Memory Card

The Siemens 6ES5374-1KG11 delivers reliable non-volatile storage for legacy automation systems. This short-type memory card operates exclusively on a stable 5V DC power supply. It securely holds user programs and essential configuration data without any battery backup. Therefore, you can trust this module for long-term data retention in industrial environments. The card supports fast read operations for seamless system restores and program backups.

Technical Specifications Overview

Parameter	Detailed Specification
Model	Siemens 6ES5374-1KG11
Category	SIMATIC S5 Memory Card (Short Type)
Memory Technology	Flash-EPROM
Storage Capacity	128 KB
Operating Voltage	5V DC (direct from PLC slot)
Data Retention	Non-volatile (no battery required)
Compatibility	SIMATIC S5 series CPUs with short slots
Dimensions (approx.)	88 mm x 56 mm x 6 mm
Weight	0.05 kg (50 grams)
Interface Type	50-pin gold-plated edge connector
Write Cycles	Minimum 10,000 erase/program cycles

Functional Features and Design Advantages

This Flash-EPROM module provides reliable program storage for critical automation tasks. The Siemens 6ES5374-1KG11 uses a simple insertion mechanism for the dedicated slot. You can easily replace or upgrade the memory without special tools. Furthermore, the card maintains data integrity during unexpected power losses or system failures.

The 128 KB capacity holds up to 2,000 logic blocks for medium-sized S5 applications. Meanwhile, the 5V DC operation draws minimal current from the backplane bus. You can reprogram this module multiple times for ongoing system maintenance. The short-type form factor saves valuable space inside crowded control cabinets.

Installation and Operational Guidelines

First, power down your SIMATIC S5 PLC completely before inserting the card. Next, align the Siemens 6ES5374-1KG11 correctly with the slot guides. Then, push firmly until you feel the connector click into place. After powering up, the CPU automatically detects the memory card.

This module excels as a backup solution for legacy machine tools. It also supports firmware updates and parameter storage for older automation cells. You should handle the card by its edges to avoid static damage. Additionally, store spare modules in anti-static bags for long-term protection.