Siemens 6ES5234-1AD11 | Memory Module

The Siemens 6ES5234-1AD11 stores your PLC program in non-volatile memory. This memory module plugs directly into the CPU of a SIMATIC S5 system. It retains all data without any external power source.

Technical specifications of Siemens 6ES5234-1AD11

Parameter	Specification
Brand	Siemens
Model	Siemens 6ES5234-1AD11
Product Family	SIMATIC S5
Category	Memory Module (EEPROM)
Memory Capacity	4 KB
Memory Technology	EEPROM (electrically erasable)
Write Cycles	Minimum 10,000 cycles
Data Retention	Over 10 years without power
Compatible CPUs	S5-100U, S5-101U, S5-102U
Installation	Plugs into CPU memory socket
Number of Components	1 PCB, 1 EEPROM chip, 1 plastic housing
Dimensions (L x W x H)	Approx. 6 cm x 3 cm x 1 cm
Weight	Approx. 0.05 kg (50 grams)
Energy Storage	None (non-volatile EEPROM)
Operating Temperature	0°C to 55°C

Detailed Technical Analysis

The Siemens uses EEPROM technology for permanent program storage. This non-volatile memory retains your code without any battery backup. You can write and erase the module electrically up to 10,000 times. It retains data for more than a decade without any power supply.

Now let us examine its physical design. The Siemens 6ES5234-1AD11 measures only 6 by 3 centimeters. Its compact size occupies minimal space inside the CPU compartment. The module contains a single EEPROM chip on a small PCB. A plastic housing protects the components from dust and static discharge.

Unlike RAM-based memory cards, this module has no battery at all. Therefore, you never need to perform any battery replacement maintenance. The Siemens 6ES5234-1AD11 weighs only 50 grams. This lightweight design places no mechanical stress on the CPU socket.

Installation and Programming Guidelines

You insert the Siemens 6ES5234-1AD11 directly into the CPU memory slot. Align the module correctly with the socket before pressing firmly. The CPU recognizes the memory module automatically at power-up. You can then transfer your program from a programmer to the module.

For programming, you need a Siemens PG or compatible device. The Siemens 6ES5234-1AD11 accepts electrical erasure and rewriting. Unlike UV-EPROM modules, you do not need any special erasing lamp. This convenience makes program updates quick and straightforward.

Practical Applications

Engineers use this module for permanent program storage in small S5 systems. For example, you can store a tested machine program on the Siemens 6ES5234-1AD11. Then install it into multiple identical CPUs without reprogramming. This module also serves as a backup copy of critical production code.

Summary

To conclude, the Siemens 6ES5234-1AD11 provides 4KB of non-volatile EEPROM storage. It weighs only 0.05 kilograms and requires no battery. Choose this memory module for reliable program retention in small S5 systems.